Question

A circuit with a resistance of `3 Omega` has a fuse melts at `4 A`. Can a voltage of `26 V` be applied to the circuit without blowing the fuse?

Answer 1

`No`

Explanation:

Data:-

Resistance`=R=3Omega`

Voltage`=V=26V`

The fuse has capacity of 4A

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 `26V` across a `3Omega` resistor, therefore, the current flowing is

`I=26/3=8.667` `implies I=8.667A`

Since, the fuse has capacity of `4A` but the current flowing in the circuit is `8.667A` therefore, the fuse will melt. Thus, the answer to this question is `No`.