Question

A circuit with a resistance of `6 Omega` has a fuse that melts at `8 A`. Can a voltage of `18 V` be applied to the circuit without blowing the fuse?

Answer 1

`Yes`

Explanation:

Data:-

Resistance`=R=6Omega`

Voltage`=V=18V`

The fuse has capacity of 8A

Sol:-

If we apply voltage `V` across a resistor whose resistance is `R` then the current `I` flowing across it can be calculated by

`I=V/R`

Here we are applying voltage of `18V` across a `6Omega` resistor, therefore, the current flowing is

`I=18/6=3` `implies I=3A`

Since, the fuse has capacity of `8A` but the current flowing in the circuit is `3A` therefore, the fuse will not melt. Thus, the answer to this question is `Yes`.