The internal resistance of a 2.1 V cell which gives a current of 0.2 A through are sistance of 10 Ω is

A 5–ampere fuse wire can withstand a maximum power of 1 watt in the circuit. The resistance of the fuse wire is

Which of the following in electricity is analogous to momentum mv in dynamics ?

Is it possible that any battery has some constant value of e.m.f but the potential difference between the plates is zero?

A 4 ohm resistance wire is bent through 180º at its mid point and the two halves are twisted together. Then the resistance is