Atransformer connected to a 120-v (rms) ac line is to supply 13,000 v (rms) for a neon sign. to reduce shock hazard, a fuse is to be inserted in the primary circuit; the fuse is to blow when the rms current in the secondary circuit exceeds 8.50 ma. what current rating should the fuse in the primary circuit have?

The current is 0.921 A.

Explanation:

Given that,

Voltage = 120 V

Current = 13000

Current exceeds = 8.50 mA

We need to calculate the current rating

Using relation of current and voltage

.....(I)

Where, = current in primary circuit

= current in secondary circuit

= voltage in primary circuit

= voltage in primary circuit

Put the value into the formula

Hence, The current is 0.921 A.

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