1) A is a maximum of 1.53 N when placed between the pole faces of a magnet. Part
ID: 1553402 • Letter: 1
Question
1) A is a maximum of 1.53 N when placed between the pole faces of a magnet. Part A If the pole faces are 69.5 cm in diameter, what is the approximate strength of the magnetic field? Express your answer to three significant figures and include the appropriate units. B = ........T2)If an electric wire is allowed to produce a magnetic field no larger than that of the Earth (0.50×104T) at a distance of 20 cm from the wire, what is the maximum current the wire can carry? Express your answer to two significant figures and include the appropriate units. I = .... (units) ....... (value)
1) A is a maximum of 1.53 N when placed between the pole faces of a magnet. Part A If the pole faces are 69.5 cm in diameter, what is the approximate strength of the magnetic field? Express your answer to three significant figures and include the appropriate units. B = ........T
2)If an electric wire is allowed to produce a magnetic field no larger than that of the Earth (0.50×104T) at a distance of 20 cm from the wire, what is the maximum current the wire can carry? Express your answer to two significant figures and include the appropriate units. I = .... (units) ....... (value)
Part A If the pole faces are 69.5 cm in diameter, what is the approximate strength of the magnetic field? Express your answer to three significant figures and include the appropriate units. B = ........T
2)If an electric wire is allowed to produce a magnetic field no larger than that of the Earth (0.50×104T) at a distance of 20 cm from the wire, what is the maximum current the wire can carry? Express your answer to two significant figures and include the appropriate units. I = .... (units) ....... (value)
Explanation / Answer
Part 2:
Given:
B=0.50*10^-4T
R=20 cm=0.2m
=4*10^-7
B = *I / [2 R]
/[2 ] = 2e-7
B = 2e-7* I / R
I = 5.e+6 * B*R = 5.e+6 * 0.50e-4 *0.20
I = 50A
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