Question 1

The flux of the electric field (24 N/C)   + (30 N/C)   + (16 N/C)   through a 2.0 m2 portion of the yz plane is:

Accepted Answer

A) 32 N . m2/C 
B) 34 N . m2/C 
C) 42 N .m2/C 
D) 48 N . m2/C 
E) 60 N .m2/C 
A) 32 N . m2/C 
B) 34 N . m2/C 
C) 42 N .m2/C 
D) 48 N . m2/C 
E) 60 N .m2/C

Question 2

A conducting sphere of radius 5.0 cm carries a net charge of 7.5 µC.What is the surface charge density on the sphere?

Accepted Answer

A) 2.4 x 10-2 C/m2 
B) 1.4 x 10-2 C/m2 
C) 9.5 x 10-4 C/m2  
D) 2.4 x 10-4 C/m2 
E) 6.0 x 10-5 C/m2 
A) 2.4 x 10-2 C/m2 
B) 1.4 x 10-2 C/m2 
C) 9.5 x 10-4 C/m2  
D) 2.4 x 10-4 C/m2 
E) 6.0 x 10-5 C/m2

Question 3

The outer surface of the cardboard center of a paper towel roll:

Accepted Answer

A) is a possible Gaussian surface 
B) cannot be a Gaussian surface because it encloses no charge 
C) cannot be a Gaussian surface since it is an insulator 
D) cannot be a Gaussian surface since it is not closed 
E) none of the above 
A) is a possible Gaussian surface 
B) cannot be a Gaussian surface because it encloses no charge 
C) cannot be a Gaussian surface since it is an insulator 
D) cannot be a Gaussian surface since it is not closed 
E) none of the above

Question 4

10 C of charge are placed on a spherical conducting shell.A particle with a charge of -3C is placed at the center of the cavity.The net charge on the outer surface of the shell is:

Accepted Answer

A) -7 C 
B) -3 C 
C) 0 C 
D) +3 C 
E) +7 C 
A) -7 C 
B) -3 C 
C) 0 C 
D) +3 C 
E) +7 C

Exam 23: Gauss Law

The flux of the electric field (24 N/C) + (30 N/C) + (16 N/C) through a 2.0 m2 portion of the yz plane is:

A conducting sphere of radius 5.0 cm carries a net charge of 7.5 µC.What is the surface charge density on the sphere?

The outer surface of the cardboard center of a paper towel roll:

10 C of charge are placed on a spherical conducting shell.A particle with a charge of -3C is placed at the center of the cavity.The net charge on the outer surface of the shell is:

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The flux of the electric field (24 N/C) + (30 N/C) + (16 N/C) through a 2.0 m² portion of the yz plane is: