Identify the relation between charge flow and change in magnetic flux.(a) ∆Q = ∆ΦB×r(b) ∆Q = 2∆Φ;B r(c) ∆Q = \(\frac {\triangle \Phi_B}{r}\)(d) ∆Q = \(\frac {\triangle \Phi_B}{2r}\)I have been asked this question during an online interview.The above asked question is from Energy Consideration: A Quantitative Study topic in division Electromagnetic Induction of Physics – Class 12

Identify the relation between charge flow and change in magnetic flux.

1.	Identify the relation between charge flow and change in magnetic flux.(a) ∆Q = ∆ΦB×r(b) ∆Q = 2∆Φ;B r(c) ∆Q = \(\frac {\triangle \Phi_B}{r}\)(d) ∆Q = \(\frac {\triangle \Phi_B}{2r}\)I have been asked this question during an online interview.The above asked question is from Energy Consideration: A Quantitative Study topic in division Electromagnetic Induction of Physics – Class 12
Answer» Right choice is (c) ∆Q = \(\frac {\triangle \Phi_B}{r}\) EASY explanation: There is a RELATIONSHIP between the charge flow through the CIRCUIT and the change in the magnetic flux. ACCORDING to Faraday’s Law, the induced emf is given by: \|ε\|=\( \frac {\triangle \Phi_B}{\triangle t}\) But, \|ε\|=Ir=\(( \frac {\triangle Q}{\triangle t} ) \)r Therefore, the relation is given by: ∆Q = \(\frac {\triangle \Phi_B}{r}\)

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