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Moving Charges And Magnetism

Question
CBSEENPH12037651
Wired Faculty App

The magnetic field of given length of wire for single turn coil at its centre is B, then its value for two turns coil for the same wire is
  • B/4 
  • B/2
  • 4B
  • 2B

Solution

C.

4B

Some More Questions From Moving Charges And Magnetism Chapter

Two moving coil meters, M1 and M2 have the following particulars:
R1 = 10 Ω   N1 = 30,
A1 = 3.6 x 10–3 m2,  B1 = 0.25 T
R2 = 14 Ω;  N2 = 42,
A2 = 1.8 x 10–3 m2, B2 = 0.50 T
(The spring constants k are identical for the two meters).
Determine the ratio of (a) current sensitivity and (b) voltage sensitivity of M2 and M1.

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