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This question belongs to Electrical Engineering Ohms Law

Ohms Law

?

A 120 V lamp-dimming circuit is controlled by a rheostat and protected from excessive current by a 3 A fuse. To what minimum resistance value can the rheostat be set without blowing the fuse? Assume a lamp resistance of 20 ohms.

A) 40 Ω B) 4 Ω C) 2 Ω D) 20 Ω

Answer & Solution

Correct Answer: Option D

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Question posted by Examveda

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Umer Jalal 3 years ago

explain?

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A 120 V lamp-dimming circuit is controlled by a rheostat and...

A 120 V lamp-dimming circuit is controlled by a rheostat and protected from excessive current by a 3 A fuse. To what minimum resistance value can the rheostat be set without blowing the fuse? Assume a lamp resistance of 20 ohms.

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