Question

A wire loop of radius 10 cm has a resistance of 2.0
?. The loop is at right angles to a uniform magnetic field B. The
field strength is changing at a rate of ?B/?t = 0.10 T/s. What is
the*magnitude* of the induced current in the
loop?

A. 4.3
mA

B. 0.3 mA

C. 2.9 mA

D. 1.0 mA

E. 1.6 mA

Answer #1

voltage = -0.1*pi*0.1^2

= 3.4159*10^-3

=> induced current = voltage /resistance

= 1.571*10^-3 A

~option E

A circular coil of 312 winds of wire (radius = 7.0 cm,
resistance = 7.4 Ω) is placed in a uniform magnetic field that is
perpendicular to the plane of the loop. The magnitude of the field
changes with time according to ? = 90sin(7?) mT, where ? is
measured in seconds. Determine the magnitude of the current induced
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A circular loop, of radius 15 cm and negligible resistance, is
sitting in a perpendicular magnetic field of 0.1 T. If the magnetic
field strength changes to a value of 0.5 T in 0.5 s, calculate the
induced current in the loop if it is in series with a 20 ohm
resistor.
5.7 × 10–2 A
1.2 × 10–2 A
2.8 × 10–3 A
6.0 × 10–4 A
1.1 A

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A closed square conducting loop is formed from 40.0 [cm] of wire
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two opposite corners of the loop are pulled at a constant speed of
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a) At what time does the area...

A
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1.
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(B) You’re asked to build an LC circuit that
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Problem 1: A closed square conducting loop is formed from 40.0
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0.50 [T] is pointing up, out of the plane of the page. Beginning at
t = 0 [s], two opposite corners of the loop are pulled at a
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A circular wire loop whose radius is 16.0 cm carries a current
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