Question 1

For the current in a stationary circuit to induce a current in an independent stationary circuit, it is necessary for the first circuit to have

Accepted Answer

A)  a steady current. 
B)  a large current. 
C)  no current. 
D)  a changing current. 
E)  None of these is correct. 
A)  a steady current. 
B)  a large current. 
C)  no current. 
D)  a changing current. 
E)  None of these is correct.

Question 2

A 0.8-m-long pole rotates about a perpendicular axis at one end. As the pole rotates, it passes through Earth's magnetic field, which has a perpendicular component of 3 *10-5 T to the plane of rotation. If the pole rotates with a frequency of 5 revolutions per second, calculate the induced EMF across the ends of the pole.

Accepted Answer

A)  3.0*0-4 V 
B)  1.2 *10-5 V 
C)  1.0 * 10-4 V 
D)  3.8 *10-4 V 
E)  2.4* 10-4 V 
A)  3.0*0-4 V 
B)  1.2 *10-5 V 
C)  1.0 * 10-4 V 
D)  3.8 *10-4 V 
E)  2.4* 10-4 V

Question 3

A 0.1-m-long rod rotates about a perpendicular axis at one end. As the rod rotates, it passes through a uniform magnetic field that has a perpendicular component of 3 *10-2 T to the plane of rotation. If the induced EMF across the ends of the rod is
0)2 V, then calculate the number of revolutions per second of the rod.

Accepted Answer

A)  6.7 * 101 revs/s 
B)  6.7 *103 revs/s 
C)  4.7*10-3 revs/s 
D)  6.7*102 revs/s 
E)  2.1 *102 revs/s 
A)  6.7 * 101 revs/s 
B)  6.7 *103 revs/s 
C)  4.7*10-3 revs/s 
D)  6.7*102 revs/s 
E)  2.1 *102 revs/s

Question 4

A straight conductor 10 cm long is perpendicular to a uniform magnetic field of flux density 2.0 mT. When the conductor carries a current of 5.0 A, the force exerted on it by the field is

Accepted Answer

A)  0.25 kN 
B)  40 $\mu$N 
C)  1.0 mN 
D)  zero 
E)  5.0 mN 
A)  0.25 kN 
B)  40 $\mu$N 
C)  1.0 mN 
D)  zero 
E)  5.0 mN

For the current in a stationary circuit to induce a current in an independent stationary circuit, it is necessary for the first circuit to have

A straight conductor 10 cm long is perpendicular to a uniform magnetic field of flux density 2.0 mT. When the conductor carries a current of 5.0 A, the force exerted on it by the field is

The Electric Field I: Discrete Charge Distributions

The Electric Field II: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Optical Images

Interference and Diffraction

Wave Particle Duality and Quantum Physics

Applications of the Schrodinger Equation

Atoms

Molecules

Solids and the Theory of Conduction

Relativity

Nuclear Physics

Elementary Particles and the Beginning of the Universe

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Exam 8: Magnetic Induction

For the current in a stationary circuit to induce a current in an independent stationary circuit, it is necessary for the first circuit to have

A straight conductor 10 cm long is perpendicular to a uniform magnetic field of flux density 2.0 mT. When the conductor carries a current of 5.0 A, the force exerted on it by the field is

The Electric Field I: Discrete Charge Distributions

The Electric Field II: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Optical Images

Interference and Diffraction

Wave Particle Duality and Quantum Physics

Applications of the Schrodinger Equation

Atoms

Molecules

Solids and the Theory of Conduction

Relativity

Nuclear Physics

Elementary Particles and the Beginning of the Universe

Filters