TS EAMCET · Physics · Electromagnetic Induction
Two circular coils \(P\) and \(Q\) are made of two identical wires of the same length. The number of turns in the \(P\) and \(Q\) are 4 and 2, respectively. The magnetic inductions at the centre of \(P\) and \(Q\) are \(B_P\) and \(B_Q\), respectively. The ratio \(\frac{B_P}{B_Q}\) is
- A 0.25
- B 4
- C 0.5
- D 2
Answer & Solution
Correct Answer
(B) 4
Step-by-step Solution
Detailed explanation
Let the two coil \(P\) and \(Q\) having same length and number of turns \(N_P=4\) and \(N_Q=2\) Then, \(l=N_P 2 \pi R_P=N_Q 2 \pi R_Q\) where, \(R_P=\) radius of coil \(P\). and \(\quad R_Q=\) radius of \(\operatorname{coil} Q\). Now,…
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