Ohms Law Question & Answers January 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 Hint 2). Which of the following is the formula of ohms law? V=IR I=V/R R=V/I All the above Hint 3). In ohms law ____ is directly proportional to resistance? Voltage Current Inductance All the above Hint 4). In ohms law ____ is indirectly proportional to resistance? Voltage Current Inductance All the above Hint 5). Current is expressed in terms of ____ units? Amperes Volts Ohms Watts Hint 6). Voltage is expressed in terms of ____ units? Amperes Volts Ohms Watts Hint 7). Resistance is expressed in terms of ____ units? Amperes Volts Ohms Watts Hint 8). Which of the following scientist discovered ohms law? George Ohms James Ohms Harry Ohms Leon Ohms Hint 9). Which of the following is the symbol of ohms? α β Ω ک Hint 10). Ohms defines ____ between any 2 points on conductor? Potential gradient Potential difference Voltage difference All the above Hint 11.) Ohms law is applicable to ___ types of circuits? AC DC ADC Both a and b Hint 12). In Ohms law current flows through _____ devices? Conductor Resistor Insulator All the above Hint 13). Materials that act against ohms law is called ____? Ohmic Non ohmic Bad conductors All the above Hint 14). Which of the following components disagrees ohms law? Diodes Batteries Switches All the above Hint Read more about Diodes. 15). A non-ohmic condition is also called ____ condition? Linear Non linear Constant Both a and b Hint 16). A ohmic condition is also called ____ condition? Linear Non linear Constant Both a and c Hint 17). Which of the following parameters are non-ohmic? Conductance Resistance Inductance Both a and b Hint 18). Which of the following is the formula for electromagnetic ohms law? V=IR J= sigma E J= I/E V=I/R Hint 19). A electromagnetic vector comprises of ____ number of components? 1 2 3 4 Hint Read more about Ferro Magnet. 20). Electric resistivity is also called ____? Specific electrical resistance Volume resistivity Resistivity All the above Hint 21). Which of the following is the units of electric resistivity? Ohms Ohms meters Ohms Seconds Ohms Kg Hint 22). Ohms law can be defined using ____ shape? Triangle Rectangle Circle Square Hint 23). Which of the following is the power formula of ohms law? P=VI P=V2/R P=I2R All the above Hint 24). A power triangle defines ____ parameters? Electric power Current Voltage All the above Hint 25.) In formula I=P/V; increase in power _______ the current value? Increases Decreases Zero Constant Hint Ohms Law Interview Questions and Answers 26). In formula I=P/V; increase in power _______ the voltage value? Increases Decreases Zero Constant Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 40). Power is expressed in terms of ____ units? Ohms Volts Watts Amps Hint 41). A law that defines the relationship between voltage, current, and resistance is called ___? Ohms law Faradays law Newton’s law Maxwell’s law Hint 42). Ohms law is a _____ law? Chemical law Physical law Mathematical law Both b and c Hint 43). Ohms law satisfies when physical parameters such as temperature is maintained at ____? Constant Increases Decreases Zero Hint 44). At certain condition increase in current in ohms law ____ the value of temperature? Constant Increases Decreases Zero Hint 45). In a bulb with filament on applying ohms law the value of current is ____ the temperature raise? Constant Increases Decreases Zero Hint 46). Identify the value of current when voltage of battery is 3V and total resistance is 6 ohms? 0.5A 1A 1.5A 2A Hint 47). Identify the value of current when voltage of battery is 6V and total resistance is 6 ohms? 0.5A 1A 1.5A 2A Hint 48). Identify the value of current when voltage of battery is 9V and total resistance is 6 ohms? 0.5A 1A 1.5A 2A Hint 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 Hint 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 Hint Ohms Law MCQs for Exams 51). Identify the value of current when voltage of battery is 9V and total resistance is 12 ohms? 0.5A 1A 1.5A 0.75A Hint 52). In water pipe based ohms law analogy the value of voltage is similar to? Water Water pressure Pipe Both b and c Hint 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 Hint 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 Hint 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 Hint 56). Which of the following are the components of ohms law experiments? Resistor Ammeter Voltmeter All the above Hint 57). Which of the following are the application of ohms law? DC ammeter DC shunt devices Determining current in a circuit All the above Hint 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 Hint 59). Ohms law is represented using ____ graph? VI IR VR VRI Hint 60). Which of the following parameter is represented on X-axis of ohms law graph? V I R VI Hint 61). Which of the following parameter is represented on Y-axis of ohms law graph? V I R VI Hint 62). VI characteristics of ohms law is represented in ____ dimensions? 1D 2D 3D 4D Hint 63). Rate of flowing of charge is called ____ parameter? Current Voltage Resistance Both a and b Hint 64). Which of the following is the formula of “Q”? n*e n/e e/n n+e Hint 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] Hint 66). In non ohmic conductor which of the following parameters are not proportional? Voltage Current Resistance Both a and b Hint 67). Which of the following is the units of electric conductivity? Per ohms per centimeter ohms * centimeter Ohms per seconds Centimeters Hint 68). The value of current ____ when potential difference is doubled and resistance if decreased to half? Same Increases Decreases Zero Hint 69). Ohms law is a universal law? Yes No May be None of the above Hint 70). A resistor comprises of _____ compositions? Clay Carbon Lithium Both a and b Hint 71). Which of the following are the properties of resistors? Good conductors Good insulators Bad conductors Both a and b Hint 72). How many colors band are observed on a resistor? 1 2 3 4 Hint 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 Hint 74). Which of the following band is multiplied while calculating resistor value? 1 st 2 nd 3 rd Both a and b Hint 75). Which of the following band on resistor represents tolerance? 1 st 2 nd 3 rd 4 th Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 81). Which of the following is the inverse of resistance? Conductance Capacitance Inductance Both a and b Hint 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 Hint 83). A resistor has ____ number of terminals? 1 2 3 4 Hint 84). A resistor is a ____ element? Active Passive Source dependent Both b and c Hint 85). A thermistor is a ____ element? Resistor Capacitor Inductor Conductor Hint Read more about Thermistor. 86). In which of the following parameters resistors vary? Construction Power dissipation Tolerance All the above Hint 87). Which of the following are the types of resistors? Thermistor Varistor Light dependent resistor All the above Hint 88). Which of the following are the properties of carbon resistor? Low cost Simple in construction Occupies less area All the above Hint 89). Carbon based resistors are constructed using ____ material? Copper Zinc Iron Aluminum Hint 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 Hint 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 Hint 92). A thermistor resistance depends on ____ parameter? Temperature Pressure Voltage Current Hint 93). Temperature is measured in terms of ____? Farads Degrees centigrade Meters Ohms Hint 94). A thermistor comprises of ____ value of temperature coefficient? Positive Negative Zero Both a and b Hint 95). In thermistor if temperature decreases the resistance value _____? Increases Decreases Zero Constant Hint 96). In thermistor if temperature increases the resistance value _____? Increases Decreases Zero Constant Hint 97). In a wire wound based resistor ____ are wounded around the insulating material? Manganin Constantan Aluminia Both a and b Hint 98). Which of the following materials have free electrons? Silver Copper Aluminum All the above Hint 99). ____ is the reason for voltage rise in a circuit? Improper connection Low conducting material Corrosion property All the above Hint 100). The length of wire should be ____ for sufficient flow of energy? Lengthy Shorter Medium Zero Hint Time's up