a) The figure below shows a coil of wire that has 4 turns and an area of 1.6cm². It moves through a magnetic field of 5T, as shown below, and leaves the field over a time interval of 0.25s. Calculate the induced e.m.f within the wire. b) The same coil of wire is now dropped through the magnetic field, as shown below. It leaves the magnetic field within a time interval of 0.25s. Calculate the induced e.m.f in this situation. 100

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Chapter13: Electromagnetic Induction
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Problem 90CP: A rectangular copper loop of mass 100 g and resistance 0.2 is in a region of uniform magnetic field...
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Questions
Faraday's Law
1.
a)
The figure below shows a coil of wire that has 4 turns and an area of 1.6cm2. It moves through a magnetic field
of 5T, as shown below, and leaves the field over a time interval of 0.25s. Calculate the induced e.m.f within the wire.
b)
The same coil of wire is now dropped through the magnetic field, as shown below. It leaves the magnetic field
within a time interval of 0.25s. Calculate the induced e.m.f in this situation.
2.
A search coil of 500 turns and diameter 0.6cm is placed within a uniform magnetic field. The search coil is connected
to a voltmeter, which registers a reading of 0.015V when it is withdrawn from the magnetic field at an angle where the
plane of the coil is at right angles to the magnetic field lines. It is removed from the field over a time interval of 0.35s.
Calculate the magnetic flux density of the uniform magnetic field.
Questions Continued
3.
The unit for flux linkage is:
a)
Tesla
b)
Volt
c)
Weber
d)
Weber per meter squared
The graph below shows the variation of magnetic flux linkage with time for a basic generator.
Magnetic Flux
Linkage (Wb)
2.5t
Time (ms)
3
7
8
-2.5t
-5
a)
Calculate the frequency of rotation of the coil
b)
Calculate the maximum e.m.f induced by the generator
c)
Calculate Vms of the generator
4.
Transcribed Image Text:Questions Faraday's Law 1. a) The figure below shows a coil of wire that has 4 turns and an area of 1.6cm2. It moves through a magnetic field of 5T, as shown below, and leaves the field over a time interval of 0.25s. Calculate the induced e.m.f within the wire. b) The same coil of wire is now dropped through the magnetic field, as shown below. It leaves the magnetic field within a time interval of 0.25s. Calculate the induced e.m.f in this situation. 2. A search coil of 500 turns and diameter 0.6cm is placed within a uniform magnetic field. The search coil is connected to a voltmeter, which registers a reading of 0.015V when it is withdrawn from the magnetic field at an angle where the plane of the coil is at right angles to the magnetic field lines. It is removed from the field over a time interval of 0.35s. Calculate the magnetic flux density of the uniform magnetic field. Questions Continued 3. The unit for flux linkage is: a) Tesla b) Volt c) Weber d) Weber per meter squared The graph below shows the variation of magnetic flux linkage with time for a basic generator. Magnetic Flux Linkage (Wb) 2.5t Time (ms) 3 7 8 -2.5t -5 a) Calculate the frequency of rotation of the coil b) Calculate the maximum e.m.f induced by the generator c) Calculate Vms of the generator 4.
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