Question

A circuit with a resistance of `8 Omega` has a fuse with a capacity of `3 A`. Can a voltage of `45 V` be applied to the circuit without blowing the fuse?

Answer 1

`No`

Explanation:

Data:-

Resistance`=R=8Omega`

Voltage`=V=45V`

The fuse has capacity of 3A

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 `45V` across a `8Omega` resistor, therefore, the current flowing is

`I=45/8=5.625` `implies I=5.625A`

Since, the fuse has capacity of `3A` but the current flowing in the circuit is `5.625A` therefore, the fuse will melt. Thus, the answer to this question is `No`.