Q6 of 52 Page 354

The potential difference across wire is 75V and its electric resistance is 30Ω. Find out the electric current through the wire.

We know that by Ohm’s Law:



Here: V = 75V


and, R = 30Ω




More from this chapter

All 52 →
4

Keeping the potential difference constant, the resistance of a circuit is halved. Then, how much does the current changes?

 5

What is the difference between a good conductor and a poor conductor? Give two example of each.

 7

If the length of a wire is halved and its cross-sectional area is doubled, then what would be the resistance of the wire?

(Given, initially the resistance of the wire is R)

 8

Define the electric resistivity of material and also write its SI unit.