If the potential difference between the ends of a fixed resistor is halved the electric power will become.
(A) Four times
The current passing through an electric kettle has been doubled. The heat produced will become: (a) half (b) double (c) four times (d) one - fourth
Keeping the p.d. constant, the resistance of the circuit is halved. The current will become. (a) One-fourth (b) four times (c) half (d) double
If the diameter of a resistance wire is halved, then its resistance becomes: (a) four times (b) half (c) one - fourth (d) two times