Question 1

A 2-T uniform magnetic field makes an angle of 30$\degree$ with the z axis. The magnetic flux through a 3-m2 portion of the xy plane is:

Accepted Answer

A)  2.0 Wb 
B)  3.0 Wb 
C)  5.2 Wb 
D)  6 Wb 
E)  12 Wb 
A)  2.0 Wb 
B)  3.0 Wb 
C)  5.2 Wb 
D)  6 Wb 
E)  12 Wb

Question 2

A long straight wire is in the plane of a rectangular conducting loop. The straight wire initially carries a constant current i in the direction shown. While the current i is being shut off, the current in the rectangle is:

Accepted Answer

A)  zero 
B)  clockwise 
C)  counterclockwise 
D)  clockwise in the left side and counterclockwise in the right side 
E)  counterclockwise in the left side and clockwise in the right side 
A)  zero 
B)  clockwise 
C)  counterclockwise 
D)  clockwise in the left side and counterclockwise in the right side 
E)  counterclockwise in the left side and clockwise in the right side

Question 3

The unit "henry" is equivalent to:

Accepted Answer

A)  volt.second/ampere 
B)  volt/second 
C)  ohm 
D)  ampere.volt/second 
E)  ampere.second/volt 
A)  volt.second/ampere 
B)  volt/second 
C)  ohm 
D)  ampere.volt/second 
E)  ampere.second/volt

Question 4

A square loop of wire lies in the plane of the page. A decreasing magnetic field is directed into the page. The induced current in the loop is:

Accepted Answer

A)  counterclockwise 
B)  clockwise 
C)  zero 
D)  up the left edge and from right to left alongthe top edge 
E)  throught the middle of the page 
A)  counterclockwise 
B)  clockwise 
C)  zero 
D)  up the left edge and from right to left alongthe top edge 
E)  throught the middle of the page

Question 5

The emf developed in a coil X due to the current in a neighboring coil Y is proportional to the:

Accepted Answer

A)  magnetic field in X 
B)  rate of change of magnetic field in X 
C)  resistance of X 
D)  thickness of the wire in X 
E)  current in Y 
A)  magnetic field in X 
B)  rate of change of magnetic field in X 
C)  resistance of X 
D)  thickness of the wire in X 
E)  current in Y

Exam 30: Induction and Inductance

A 2-T uniform magnetic field makes an angle of 30 °\degree° with the z axis. The magnetic flux through a 3-m2 portion of the xy plane is:

A long straight wire is in the plane of a rectangular conducting loop. The straight wire initially carries a constant current i in the direction shown. While the current i is being shut off, the current in the rectangle is:

The unit "henry" is equivalent to:

A square loop of wire lies in the plane of the page. A decreasing magnetic field is directed into the page. The induced current in the loop is:

The emf developed in a coil X due to the current in a neighboring coil Y is proportional to the:

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A 2-T uniform magnetic field makes an angle of 30 $\degree$ with the z axis. The magnetic flux through a 3-m² portion of the xy plane is: