# A circuit with a resistance of 8 Omega has a fuse with a capacity of 3 A. Can a voltage of 36 V be applied to the circuit without blowing the fuse?

Jan 12, 2016

No. The fuse will blow.

#### Explanation:

According to Ohm's Law, the total current flowing in a closed circuit is directly proportional to the total potential difference applied across the circuit.

$V = I R$.

So in this case, ${I}_{T} = \frac{{V}_{T}}{{R}_{T}} = \frac{36 V}{8 \Omega} = 4 , 5 A$.

Therefore the $3 A$ fuse will blow since $4 , 5 A > 3 A$.