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A circuit with a resistance of #6 Omega# has a fuse that melts at #8 A#. Can a voltage of #45 V# be applied to the circuit without blowing the fuse?

Answer 1

Carson Alexander

Yes, a voltage of 45 V can be applied to the circuit without blowing the fuse.

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Answer 2

Sebastian Acosta

Current in circuit= voltage divided by Resistance
Voltage =45 resistance=6 ohms. So current is 45/6=7.5 amperes..

The fuse is safe because it has an 8 amp rating and an actual current of only 7.5 amps. It won't blow off.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.