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Practice Questions



This activity contains 25 questions.

Question 1.
Electrons carry a


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Question 2.
The units of Coulomb's constants are


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Question 3.
The units of permittivity are


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Question 4.
The unit of a charge is the

 
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Question 5.
Which of the following are the units of electric field?


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Question 6.
Two charges Q1 and Q2 are separated by a distance D. If the distance is doubled, the force is


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Question 7.
Two charges Q1 and Q2 are separated by a distance D. If Q1 is doubled, the force is


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Question 8.
Two charges Q1 and Q2 are separated by a distance D. If Q1 and Q2 are doubled, the force is


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Question 9.
Two charges Q1 and Q2 are separated by a distance D. If both Q1 and D are doubled, the force is


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Question 10.
Two charges Q1 and Q2 are separated by a distance D. If Q1, Q2 and D are all doubled, the force is


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Question 11.

In the above figure, if Q1 is negative and has magnitude less than Q2 which is positive, where could a positive charge be placed and possibly have a zero net force on it?


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Question 12.

In the above figure, if Q1 and Q2 are positive, where could a negative charge be placed and have a vertically upward net force on it?


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Question 13.

In the above figure, if Q1 and Q2 are positive, where would the electric field be vertically upward ?


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Question 14.

In the above figure, if Q1 and Q2 are positive and the same size, where would the electric field be zero ?


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Question 15.

In the above figure, if Q1 is negative and Q2 is positive and both are the same magnitude, where would the electric field be zero ?


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Question 16.


In the above figure, if Q1 is negative and Q2 is positive and the distance from Q2 to point C is 1/4 the distance between the charges, how many times greater than Q2 in magnitude must Q1 be for the electric field to be zero at C?

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Question 17.


In the above figure if the vertical distance from Point E to B is the same as the horizontal distance from E to either charge and the electric field at B from either charge has magnitude 1.0 x 106, what is the magnitude of the net electric field?

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Question 18.


In the above figure the vertical distance from Point E to B is the same as the horizontal distance from E to either charge and the electric field at B from either charge has magnitude 1.0 x 106. If Q1 is negative and Q2 is positive, what is the direction of the net electric field at B?

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Question 19.


In the above figure the vertical distance from Point E to B is the same as the horizontal distance from E to either charge and the electric field at B from either charge has magnitude 1.0 x 106. If both Q1 and Q2 are positive, what is the direction of the net electric field at B?

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Question 20.

The figure above shows a metal shell surrounding a positive charge. What is the charge on the metal surface at b?


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Question 21.

The figure above shows a metal shell surrounding a positive charge. Which of the following statements is true?


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Question 22.
In Question 20 what would be the charge on the exterior surface (d)?


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Question 23.
Four people tell you they have a negative charge of a certain value. Which one is not telling the truth?


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Question 24.
What must be the charge on each of two 100 kg spherical masses in order for the electrical force to equal the gravitational force?


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Question 25.
How many electrons would it take to make up a charge of minus one millionth of a Coulomb?


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