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A circuit contains an ammeter, a battery...

A circuit contains an ammeter, a battery of `30 V` and a resistance `40.8 ohm` all connected in series. If the ammeter has a coil of resistance `480 ohm` and a shunt of `20 ohm`, the reading in the ammeter will be

A

0.041666666666667

B

0.5 A

C

0.2 A

D

none

Text Solution

Verified by Experts

The correct Answer is:
D
`R_eq = 160/3 Omega`
`i = (30 xx 3)/160 = 9/16 , V = 22.5V`
` V_(1) = 7.5V , i_(1) = (7.5)/400 = 3/16`
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