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Moving Charges And Magnetism
Question
A horizontal overhead power line carries a current of 90 A in east to west direction. What is the magnitude and direction of the magnetic field due to the current 1.5 m below the line?
Solution
Given, current, I= 90 A
distance ,r = 1.5 m
Thus,
the magnitude of magnetic field is given by Ampere's circuital law
Applying the right-hand thumb rule, we find that the magnetic field at the observation point is directed towards south.
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.
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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Mock Test Series
Mock Test Series