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?

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Answer 1 · 2016-05-13T12:51:18

No.

If the fuse can tolerate a maximum of $3A$ 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 $8Omega$ is : $V_c = 3Axx8Omega = 24V$

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

A circuit with a resistance of 8 Omega8 Omega has a fuse with a capacity of 3 A3 A. Can a voltage of 28 V28 V be applied to the circuit without blowing the fuse?