Ohm’s Law MCQs

21. A light bulb draws 300mA when the voltage across it is 240V. The resistance of the light bulb is

1. 400 ohms 
2. 600 ohms
3. 800 ohms
4. 1000 ohms

22. The curve representing ohm’s law is

1. linear
2. hyperbolic
3. parabolic
4. triangular

23. Joule/Coulomb is the unit of

1. electric field
2. potential
3. charge
4. none of these

24. Point form of ohm’s law is represented by the relation

1. $J=\frac{\sigma}{E}$
2. J = σE
3. $J=\frac{E}{\sigma}$
4. None of these

25. Upon which of the factors does the voltage drop depend?

1. Only upon the resistance of the conductor
2. Only upon the length and the specific resistance of the conductor
3. Upon the cross-section area and the conductivity of the conductor
4. Upon the resistance of the conductor and the current flowing through it