Question

A circuit with a resistance of `4 Omega` has a fuse melts at `6 A`. Can a voltage of `12 V` be applied to the circuit without blowing the fuse?

Answer 1

Yes

Explanation:

Data:-

Resistance`=R=4Omega`

Voltage`=V=12V`

The fuse melts at 6A

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 `12V` across a `4Omega` resistor, therefore, the current flowing is

`I=12/4=3` `implies I=3A`

Since, the fuse melts at `6A` but the current flows only `3A` therefore, the fuse will not melt. Thus, the answer to this question is yes.