Ohms Law Question & AnswersJanuary 31, 2022 By WatElectronics This article lists 100 Ohms Law MCQs for engineering students. All the Ohms Law Questions and Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up their fundamentals on Ohms Law.A law that defines the relationship between physical parameters in electronics such as current, voltage, and resistance is the ohms law. George Ohms a German scientist has experimented using glass tubes to find the value of current before discovering the ohms law. Ohms is represented as a mathematical equation as ‘V=IR’ where ‘V’ stands for voltage, ‘I’ stands for current and ‘R’ stands for resistance. This equation defines that whenever there is an increase in the value of resistance the value of voltage increases. In other words, ohms law is used for measuring the resistance value of the conducting component or a circuit. Ohms law is not applicable for semiconductor and insulating substances. Ohms law is used in DC ammeter, DC shunt devices and determining current in a current.Ohm law benefit in terms of calculating voltage, current, and resistance of a circuit, they are used for power calculation, and voltage drop. They limit in terms of it does not apply for unilateral elements, VI is not constant for elements like capacitance and does not apply for nonlinear elements. 1). A Ohms law defines current flow through _____ substance? Conducting Insulating Non conducting Both a and c HintElectron free movement substances.2). Which of the following is the formula of ohms law? V=IR I=V/R R=V/I All the above Hint3 formulas representation using single formula.3). In ohms law ____ is directly proportional to resistance? Voltage Current Inductance All the above HintVoltmeter measures?4). In ohms law ____ is indirectly proportional to resistance? Voltage Current Inductance All the above HintAmmeter is used to measure?5). Current is expressed in terms of ____ units? Amperes Volts Ohms Watts Hint1.2 A means?6). Voltage is expressed in terms of ____ units? Amperes Volts Ohms Watts Hint2V means?7). Resistance is expressed in terms of ____ units? Amperes Volts Ohms Watts HintΩ ?8). Which of the following scientist discovered ohms law? George Ohms James Ohms Harry Ohms Leon Ohms HintA German scientist.9). Which of the following is the symbol of ohms? α β Ω ک HintThe symbol of ohms is Ω.10). Ohms defines ____ between any 2 points on conductor? Potential gradient Potential difference Voltage difference All the above HintA pressure from an electrical circuit's power source that pushes charged electrons (current) through a conducting loop.11.) Ohms law is applicable to ___ types of circuits? AC DC ADC Both a and b HintA flow of current changes its direction backwards periodically. and flows in a single direction steadily.12). In Ohms law current flows through _____ devices? Conductor Resistor Insulator All the above HintPassive elements.13). Materials that act against ohms law is called ____? Ohmic Non ohmic Bad conductors All the above Hintdiodes, transistors, thyristors, electrolyte, semiconductors, etc.14). Which of the following components disagrees ohms law? Diodes Batteries Switches All the above HintPassive elements. Read more about Diodes.15). A non-ohmic condition is also called ____ condition? Linear Non linear Constant Both a and b HintA system in which the change of the output is not proportional to the change of the input.16). A ohmic condition is also called ____ condition? Linear Non linear Constant Both a and c HintInput = Output.17). Which of the following parameters are non-ohmic? Conductance Resistance Inductance Both a and b HintParameter that opposes current flow and that allows current flow.18). Which of the following is the formula for electromagnetic ohms law? V=IR J= sigma E J= I/E V=I/R HintProduct of terms.19). A electromagnetic vector comprises of ____ number of components? 1 2 3 4 HintEven number. Read more about Ferro Magnet.20). Electric resistivity is also called ____? Specific electrical resistance Volume resistivity Resistivity All the above Hint3 terms.21). Which of the following is the units of electric resistivity? Ohms Ohms meters Ohms Seconds Ohms Kg HintResistance and distance.22). Ohms law can be defined using ____ shape? Triangle Rectangle Circle Square Hint3 corners.23). Which of the following is the power formula of ohms law? P=VI P=V2/R P=I2R All the above HintProduct of terms.24). A power triangle defines ____ parameters? Electric power Current Voltage All the above Hint3 parameters.25.) In formula I=P/V; increase in power _______ the current value? Increases Decreases Zero Constant HintPower and current inversely proportional.Ohms Law Interview Questions and Answers26). In formula I=P/V; increase in power _______ the voltage value? Increases Decreases Zero Constant HintPower and voltage inversely proportional.27). Which of the following is the formula for Energy E, power P and resistance R according to ohms law pie chart? E=sqrt[P*R] E=[P+l] E=I-R All the above HintProduct of terms.28). Which of the following is the formula for resistance with energy E and current I according to ohms law pie chart? R=E/I R=E + I R=E-I All the above HintDivision formula.29). Which of the following is the formula for power with E and I according to ohms law pie chart? P=E*I P=E/I P=E2+R All the above HintProduct of terms.30). Which of the following is the formula for Energy E, power P and current I according to ohms law pie chart? E=P/l E=P+I E=P-I E=PI HintDivision formula.31). Which of the following is the formula for Energy E, power P and resistance R according to ohms law pie chart? E=IR E=I-R E=I+R All the above HintProduct of terms.32). Which of the following is the formula for Resistance R, with Energy E, current I according to ohms law pie chart? R=E/I R=E+I R=R-I All the above HintDivision formula.33). Which of the following is the formula for Resistance R, with Energy E, power P according to ohms law pie chart? R=E2/P R=E+P R=E-P R=P/E HintDivision formula.34). Which of the following is the formula for Resistance R, Energy E, power P according to ohms law pie chart? P=E2/R P=E2+R P=E2-R P=E/R HintDivision formula.35). Which of the following is the formula for Power P, with Resistance R, current I according to ohms law pie chart? P=I2R P=I/R P=I+R P=I-R HintProduct of terms.36). Which of the following is the formula for Power P, with Energy E, current I according to ohms law pie chart? P=EI P=E/I P=E+I P=E-I HintProduct of terms.37). Which of the following is the formula for Current I, with Energy E, resistance R according to ohms law pie chart? I=E/R I=E-R I=E+R I=ER HintRatio of terms.38). Which of the following is the formula for Current I, with Energy E, Power P according to ohms law pie chart? I=P/E I=PE I=P-E I=P+E HintSum of terms.39). Which of the following is the formula for Current I, with resistance R, Power P according to ohms law pie chart? I=sqrt[P/R] I=P/R I=P+R I=P-R HintRatio of terms.40). Power is expressed in terms of ____ units? Ohms Volts Watts Amps HintWattmeter measures in terms of?41). A law that defines the relationship between voltage, current, and resistance is called ___? Ohms law Faradays law Newton’s law Maxwell’s law HintA law that measures conducting substance parameters.42). Ohms law is a _____ law? Chemical law Physical law Mathematical law Both b and c HintPractical and theoretical law.43). Ohms law satisfies when physical parameters such as temperature is maintained at ____? Constant Increases Decreases Zero HintInput = Output,44). At certain condition increase in current in ohms law ____ the value of temperature? Constant Increases Decreases Zero HintCurrent and temperature directly proportional.45). In a bulb with filament on applying ohms law the value of current is ____ the temperature raise? Constant Increases Decreases Zero HintCurrent and temperature directly proportional.46). Identify the value of current when voltage of battery is 3V and total resistance is 6 ohms? 0.5A 1A 1.5A 2A HintV=IR.47). Identify the value of current when voltage of battery is 6V and total resistance is 6 ohms? 0.5A 1A 1.5A 2A HintV=IR.48). Identify the value of current when voltage of battery is 9V and total resistance is 6 ohms? 0.5A 1A 1.5A 2A HintV=IR.49). Identify the value of current when voltage of battery is 3V and total resistance is 12 ohms? 0.5A 1A 1.5A 0.25A HintV=IR.50). Identify the value of current when voltage of battery is 6V and total resistance is 12 ohms? 0.5A 1A 1.5A 0.25A HintV=IR.Ohms Law MCQs for Exams51). Identify the value of current when voltage of battery is 9V and total resistance is 12 ohms? 0.5A 1A 1.5A 0.75A HintV=IR.52). In water pipe based ohms law analogy the value of voltage is similar to? Water Water pressure Pipe Both b and c Hint2 components. Read more about Waterpipe.53). Which of the following represents the value of current in water pipe based ohms law analogy? Pipe Pressure applied Size of pipe Direction of water HintComponent.54). Which of the following represents the value of voltage in water pipe based ohms law analogy? Pipe Pressure applied Size of pipe Direction of water HintParameter specific.55). Which of the following represents the value of resistance in water pipe based ohms law analogy? Pipe Pressure applied Size of pipe Direction of water HintPhysical dimension.56). Which of the following are the components of ohms law experiments? Resistor Ammeter Voltmeter All the above Hint3 parameters.57). Which of the following are the application of ohms law? DC ammeter DC shunt devices Determining current in a circuit All the above Hint3 applications.58). Which of the following are limitations of ohms law? Does not applies for unilateral element VI is not constant for elements like capacitance Does not apply for non linear elements All the above Hint3 limitation.59). Ohms law is represented using ____ graph? VI IR VR VRI HintOhms law parameters.60). Which of the following parameter is represented on X-axis of ohms law graph? V I R VI HintExpressed in terms of volts.61). Which of the following parameter is represented on Y-axis of ohms law graph? V I R VI HintMeasured in terms of amperes.62). VI characteristics of ohms law is represented in ____ dimensions? 1D 2D 3D 4D HintX and Y plane.63). Rate of flowing of charge is called ____ parameter? Current Voltage Resistance Both a and b HintAmmeter measures?64). Which of the following is the formula of “Q”? n*e n/e e/n n+e HintProduct of terms.65). When length “l”, area “A” and resistivity “p” is give the value of resistance is ____? p[l/A] p[lA] p[l-A] p[l+A] HintRatio of terms.66). In non ohmic conductor which of the following parameters are not proportional? Voltage Current Resistance Both a and b Hint2 parameters.67). Which of the following is the units of electric conductivity? Per ohms per centimeter ohms * centimeter Ohms per seconds Centimeters HintResistance and distance parameter.68). The value of current ____ when potential difference is doubled and resistance if decreased to half? Same Increases Decreases Zero HintConstant output.69). Ohms law is a universal law? Yes No May be None of the above HintInvalid.70). A resistor comprises of _____ compositions? Clay Carbon Lithium Both a and b Hint2 substance.71). Which of the following are the properties of resistors? Good conductors Good insulators Bad conductors Both a and b Hint2 properties.72). How many colors band are observed on a resistor? 1 2 3 4 HintEven number.73). Which of the following band on resistor defines 1 st and 2 nd digits of resistor value? 1 st 2 nd 3 rd Both a and b Hint2 bands.74). Which of the following band is multiplied while calculating resistor value? 1 st 2 nd 3 rd Both a and b HintOdd number.75). Which of the following band on resistor represents tolerance? 1 st 2 nd 3 rd 4 th HintEven number.Ohms Law Quiz Questions and Answers.76). Which of the following is the first law of series circuits? Overall circuit resistance is developed using individual resistance Total voltage is sum of circuits voltage Equal quantity if current exists in circuit Both a and b HintGenerates to oppose current flow.77). Which of the following is the 2 nd law of series circuits? Overall circuit resistance is developed using individual resistance Total voltage is sum of circuits voltage Equal quantity if current exists in circuit Both a and b HintMeasured in volts.78). Which of the following is the 3 rd law of series circuits? Overall circuit resistance is developed using individual resistance Total voltage is sum of circuits voltage Equal quantity if current flows in circuit Both a and b HintMeasures in amperes.79). Which of the following is the first law of parallel circuits? Resistance values is calculated with reciprocal value Total current is sum of individual current Equal voltage is present in circuit Both a and c HintInverse value calculation.80). Which of the following is the 2 nd law of parallel circuits? Resistance values is calculated with reciprocal value Total current is sum of individual current Equal voltage is present in circuit Both a and c HintMeasures in amperes.81). Which of the following is the inverse of resistance? Conductance Capacitance Inductance Both a and b HintMeasured in siemens.82). Which of the following is the 3 rd law of parallel circuits? Resistance values is calculated with reciprocal value Total current is sum of individual current Equal voltage is present in circuit Both a and c HintMeasures in terms of volts.83). A resistor has ____ number of terminals? 1 2 3 4 HintEven number.84). A resistor is a ____ element? Active Passive Source dependent Both b and c HintComponents that depends on source.85). A thermistor is a ____ element? Resistor Capacitor Inductor Conductor HintMeasures in ohms. Read more about Thermistor.86). In which of the following parameters resistors vary? Construction Power dissipation Tolerance All the above Hint3 terms.87). Which of the following are the types of resistors? Thermistor Varistor Light dependent resistor All the above Hint3 types.88). Which of the following are the properties of carbon resistor? Low cost Simple in construction Occupies less area All the above Hint3 Properties.89). Carbon based resistors are constructed using ____ material? Copper Zinc Iron Aluminum HintAtomic number 29.90). Which of the following are the ranges of carbon based resistors? 1ohms to 22Mega ohms 2Ohms to 20Mega ohms 3Ohms to 20Ohms 30Ohms to 40Megaohms HintMinimum range.91). Which of the following is the disadvantage of a carbon resistor? High temperature sensitive High tolerance range Not compatible in most of the electronic devices All the above Hint3 disadvantages.92). A thermistor resistance depends on ____ parameter? Temperature Pressure Voltage Current HintMeasured in degree centigrade.93). Temperature is measured in terms of ____? Farads Degrees centigrade Meters Ohms Hint°C94). A thermistor comprises of ____ value of temperature coefficient? Positive Negative Zero Both a and b HintInverting terminal.95). In thermistor if temperature decreases the resistance value _____? Increases Decreases Zero Constant HintInversely proportional.96). In thermistor if temperature increases the resistance value _____? Increases Decreases Zero Constant HintInversely proportional.97). In a wire wound based resistor ____ are wounded around the insulating material? Manganin Constantan Aluminia Both a and b HintAlloy of typically 84.2% copper, 12.1% manganese, and 3.7% nickel.98). Which of the following materials have free electrons? Silver Copper Aluminum All the above Hint3 elements.99). ____ is the reason for voltage rise in a circuit? Improper connection Low conducting material Corrosion property All the above Hint3 reasons.100). The length of wire should be ____ for sufficient flow of energy? Lengthy Shorter Medium Zero HintLong. Time is Up! Time's up
