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When 1A is passed through three coils A,...

When `1A` is passed through three coils `A,B,C` in series the voltage drops are respectively 6,3 and 8 volt on direct current source and 7,5 and 10 volt on Alternating current source
Power factor of coil `B`, will be

A

0.6

B

0.8

C

0.7

D

None

Text Solution

Verified by Experts

The correct Answer is:
A
`R_(B) = 3 Omega , Z_(B) = 5`
`Z_(B) = sqrt(R_(B)^(2) + X_(B)^(2)) implies 4 Omega , p. f = (3)/(5) = 0.6`
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