# A circuit with a resistance of 8 Omega has a fuse with a capacity of 3 A. Can a voltage of 28 V be applied to the circuit without blowing the fuse?

May 13, 2016

No.

#### Explanation:

If the fuse can tolerate a maximum of $3 A$ of current (${I}_{c}$), then the maximum voltage that can be put safely on the circuit is given as:

${V}_{c} = {I}_{c} R$

Hence the maximum voltage, for this circuit with resistance ($R$) of $8 \Omega$ is : ${V}_{c} = 3 A \times 8 \Omega = 24 V$

As $28 V > 24 V$, it will blow the fuse.