Question

A circuit with a resistance of `9 Omega` has a fuse melts at `6 A`. Can a voltage of `45 V` be applied to the circuit without blowing the fuse?

Answer 1

Yes, a voltage of `45\ V` can be applied to the circuit without blowing the fuse

Explanation:

The electric current `I`, flowing through the circuit of resistance `R=9\Omega` when a voltage of `45\ V` is applied, is given by Ohm's law

`I=V/R`

`=45/9`

`=5\ A`

It is given that the fuse melts at current `6\ A` while the electric current through the circle is less i.e. `5\ A`

Hence, a voltage of `45\ V` can be applied to the circuit without blowing the fuse