A current of 6A flows through a coil when connected to a 24 volt d.c. supply. To get the same current with a 50 Hz a.c. supply, the voltage required i

Question

A current of 6A flows through a coil when connected to a 24 volt d.c. supply. To get the same current with a 50 Hz a.c. supply, the voltage required i

A current of 6A flows through a coil when connected to a 24 volt d.c. supply. To get the same current with a 50 Hz a.c. supply, the voltage required is 30 V. What is the power factor of the coil?
A. `2/5`
B. `4/5`
C. `5/6`
D. `3/5`

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - B
`R = 24/6 = 4 Omega and Z = 30/6 = 5Omega`
`:.` Power factor = `cos theta = R/Z = 4/5`.

4 views Answered 2023-02-05 15:29