The flux in a closed circuit of resistance `20 Omega` varies with time according to the equation `phi = 6t^(2)-5t+1`. What is the induced current at t

Question

The flux in a closed circuit of resistance `20 Omega` varies with time according to the equation `phi = 6t^(2)-5t+1`. What is the induced current at t

The flux in a closed circuit of resistance `20 Omega` varies with time according to the equation `phi = 6t^(2)-5t+1`. What is the induced current at time `t = 0.25` second?
A. 0.5 A
B. 0.4 A
C. 0.1 A
D. 0.2 A

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 - C
`phi=6t^2-5t+1 e = -(d phi)/(dt)=-[12t-5]`
at time `t = 0.25 s, e = -[12 xx 0.25 - 5] = 2V`
`:. E=e/R=2/20 = 0.1A`.

4 views Answered 2023-02-05 15:29