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Moving Charges And Magnetism
Question
A long straight wire in the horizontal plane carries a current of 50 A in north to south direction. Give the magnitude and direction of B at a point 2.5 m east of the wire.
Solution
Given,
Current carried by wire, I= 50 A
Distance from the wire, r = 2.5 m
Magnetic field at point r, B = ?
Using ampere's circuital law
The direction of magnetic field can be found out by applying right hand thumb rule. As the direction of current is from north to south represented by thumb, the direction iof magnetic field is vertically upwards in east direction of wire.
Current carried by wire, I= 50 A
Distance from the wire, r = 2.5 m
Magnetic field at point r, B = ?
Using ampere's circuital law
The direction of magnetic field can be found out by applying right hand thumb rule. As the direction of current is from north to south represented by thumb, the direction iof magnetic field is vertically upwards in east direction of wire.
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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