Question 1

A 5.0-C charge is 10 m from a -2.0-C charge.The electrostatic force is on the positive charge is:

Accepted Answer

A) 9.0*108 N toward the negative charge 
B) 9.0 * 108 N away from the negative charge 
C) 9.0 * 109 N toward the negative charge 
D) 9.0 * 109 N away from the negative charge 
E) none of these 
A) 9.0*108 N toward the negative charge 
B) 9.0 * 108 N away from the negative charge 
C) 9.0 * 109 N toward the negative charge 
D) 9.0 * 109 N away from the negative charge 
E) none of these A

Question 2

Consider the following procedural steps:   To charge an electroscope by induction, use the sequence:

Accepted Answer

A) 1, 4, 5, 2 
B) 4, 1, 2, 5 
C) 3, 1, 2, 5 
D) 4, 1, 5, 2 
E) 3, 5 
A) 1, 4, 5, 2 
B) 4, 1, 2, 5 
C) 3, 1, 2, 5 
D) 4, 1, 5, 2 
E) 3, 5 B

Question 3

If excess charge is put on a spherical conductor,

Accepted Answer

A) it remains where it was placed 
B) it spreads a little from where it was placed but not over the whole sphere 
C) it spreads uniformly over the surface of the sphere if the sphere is small 
D) it spreads uniformly throughout the volume of the conductor 
E) it spreads uniformly over the surface of the sphere 
A) it remains where it was placed 
B) it spreads a little from where it was placed but not over the whole sphere 
C) it spreads uniformly over the surface of the sphere if the sphere is small 
D) it spreads uniformly throughout the volume of the conductor 
E) it spreads uniformly over the surface of the sphere E

Question 4

A coulomb is the same as:

Accepted Answer

A) an ampere/second 
B) half an ampere .second2 
C) an ampere/meter2 
D) an ampere .second 
E) a newton .meter2 
A) an ampere/second 
B) half an ampere .second2 
C) an ampere/meter2 
D) an ampere .second 
E) a newton .meter2

Question 5

A particle with charge Q is on the y axis a distance a from the origin and a particle with charge q is on the x axis a distance d from the origin.The value of d for which the x component of the force on the second particle is the greatest is:

Accepted Answer

A) 0 
B) a 
C)    
D) a/2 
E)    
A) 0 
B) a 
C)    
D) a/2 
E)

Question 6

A positively charged insulating rod is brought close to an object that is suspended by a string.If the object is attracted toward the rod we can conclude:

Accepted Answer

A) the object is positively charged 
B) the object is negatively charged 
C) the object is an insulator 
D) the object is a conductor 
E) none of the above 
A) the object is positively charged 
B) the object is negatively charged 
C) the object is an insulator 
D) the object is a conductor 
E) none of the above

Question 7

When a hard rubber rod is given a negative charge by rubbing it with wool:

Accepted Answer

A) positive charges are transferred from rod to wool 
B) negative charges are transferred from rod to wool 
C) positive charges are transferred from wool to rod 
D) negative charges are transferred from wool to rod 
E) negative charges are created and stored on the rod 
A) positive charges are transferred from rod to wool 
B) negative charges are transferred from rod to wool 
C) positive charges are transferred from wool to rod 
D) negative charges are transferred from wool to rod 
E) negative charges are created and stored on the rod

Question 8

A kiloampere . hour is a unit of:

Accepted Answer

A) current 
B) charge per time 
C) power 
D) charge 
E) energy 
A) current 
B) charge per time 
C) power 
D) charge 
E) energy

Question 9

The leaves of a positively charged electroscope diverge more when an object is brought near the knob of the electroscope.The object must be:

Accepted Answer

A) a conductor 
B) an insulator 
C) positively charged 
D) negatively charged 
E) uncharged 
A) a conductor 
B) an insulator 
C) positively charged 
D) negatively charged 
E) uncharged

Question 10

The magnitude of the charge on an electron is approximately:

Accepted Answer

A) 1023 C 
B) 10-23 C 
C) 1019 C 
D) 10-19 C 
E) 109 C 
A) 1023 C 
B) 10-23 C 
C) 1019 C 
D) 10-19 C 
E) 109 C

Question 11

A positively charged metal sphere A is brought into contact with an uncharged metal sphere B.As a result:

Accepted Answer

A) both spheres are positively charged 
B) A is positively charged and B is neutral 
C) A is positively charged and B is negatively charged 
D) A is neutral and B is positively charged 
E) A is neutral and B is negatively charged 
A) both spheres are positively charged 
B) A is positively charged and B is neutral 
C) A is positively charged and B is negatively charged 
D) A is neutral and B is positively charged 
E) A is neutral and B is negatively charged

Question 12

Two particles have charges Q and -Q (equal magnitude and opposite sign).For a net force of zero to be exerted on a third charge it must be placed:

Accepted Answer

A) midway between Q and -Q 
B) on the perpendicular bisector of the line joining Q and -Q, but not on that line itself 
C) on the line joining Q and -Q, to the side of Q opposite -Q 
D) on the line joining Q and -Q, to the side of -Q opposite Q 
E) at none of these places (there is no place) 
A) midway between Q and -Q 
B) on the perpendicular bisector of the line joining Q and -Q, but not on that line itself 
C) on the line joining Q and -Q, to the side of Q opposite -Q 
D) on the line joining Q and -Q, to the side of -Q opposite Q 
E) at none of these places (there is no place)

Question 13

One type of medical imaging process is called positron emission tomography.Radioactive material is injected into a patient; during the radioactive decay the material emits a positron, which then interacts with an atomic electron, emitting gamma rays, which are detected by the imager.This gamma ray emission process is called:

Accepted Answer

A) pair production 
B) annihilation 
C) absorption 
D) alpha decay 
E) fission 
A) pair production 
B) annihilation 
C) absorption 
D) alpha decay 
E) fission

Question 14

Two particles, X and Y, are 4 m apart.X has a charge of 2Q and Y has a charge of Q.The force of X on Y:

Accepted Answer

A) has twice the magnitude of the force of Y on X 
B) has half the magnitude of the force of Y on X 
C) has four times the magnitude of the force of Y on X 
D) has one-fourth the magnitude of the force of Y on X 
E) has the same magnitude as the force of Y on X 
A) has twice the magnitude of the force of Y on X 
B) has half the magnitude of the force of Y on X 
C) has four times the magnitude of the force of Y on X 
D) has one-fourth the magnitude of the force of Y on X 
E) has the same magnitude as the force of Y on X

Question 15

The units of 1/4$\pi$  0 are:

Accepted Answer

A) N2/C2 
B) N.m/C 
C) N2.m2/C2  
D) N.m2/C2 
E) m2/C2 
A) N2/C2 
B) N.m/C 
C) N2.m2/C2  
D) N.m2/C2 
E) m2/C2

Question 16

To make an uncharged object have a negative charge we must:

Accepted Answer

A) add some atoms 
B) remove some atoms 
C) add some electrons 
D) remove some electrons 
E) write down a negative sign 
A) add some atoms 
B) remove some atoms 
C) add some electrons 
D) remove some electrons 
E) write down a negative sign

Question 17

Two particles A and B have identical charge Q.For a net force of zero to be exerted on a third charged particle it must be placed:

Accepted Answer

A) midway between A and B 
B) on the perpendicular bisector of the line joining A and B but away from the line 
C) on the line joining A and B, not between the particles 
D) on the line joining A and B, closer to one of them than the other 
E) at none of these places (there is no place) 
A) midway between A and B 
B) on the perpendicular bisector of the line joining A and B but away from the line 
C) on the line joining A and B, not between the particles 
D) on the line joining A and B, closer to one of them than the other 
E) at none of these places (there is no place)

Question 18

A wire contains a steady current of 2 A.The charge that passes a cross section in 2 s is:

Accepted Answer

A) 3.2 * 10-19 C 
B) 6.4 * 10-19 C 
C) 1 C 
D) 2 C 
E) 4 C 
A) 3.2 * 10-19 C 
B) 6.4 * 10-19 C 
C) 1 C 
D) 2 C 
E) 4 C

Question 19

A conductor is distinguished from an insulator with the same number of atoms by the number of:

Accepted Answer

A) nearly free atoms 
B) electrons 
C) nearly free electrons 
D) protons 
E) molecules 
A) nearly free atoms 
B) electrons 
C) nearly free electrons 
D) protons 
E) molecules

Question 20

Which of the following is NOT a possible value for the electric charge on an object?

Accepted Answer

A) 8 x 10-20 C 
B) 8 x 10-19 C 
C) 8 x 10-18 C 
D) 8 x 10-17 C 
E) 8 x 10-16 C 
A) 8 x 10-20 C 
B) 8 x 10-19 C 
C) 8 x 10-18 C 
D) 8 x 10-17 C 
E) 8 x 10-16 C

Exam 21: Coulombs Law

A 5.0-C charge is 10 m from a -2.0-C charge.The electrostatic force is on the positive charge is:

Consider the following procedural steps: To charge an electroscope by induction, use the sequence:

If excess charge is put on a spherical conductor,

A coulomb is the same as:

A particle with charge Q is on the y axis a distance a from the origin and a particle with charge q is on the x axis a distance d from the origin.The value of d for which the x component of the force on the second particle is the greatest is:

A positively charged insulating rod is brought close to an object that is suspended by a string.If the object is attracted toward the rod we can conclude:

When a hard rubber rod is given a negative charge by rubbing it with wool:

A kiloampere . hour is a unit of:

The leaves of a positively charged electroscope diverge more when an object is brought near the knob of the electroscope.The object must be:

The magnitude of the charge on an electron is approximately:

A positively charged metal sphere A is brought into contact with an uncharged metal sphere B.As a result:

Two particles have charges Q and -Q (equal magnitude and opposite sign).For a net force of zero to be exerted on a third charge it must be placed:

Two particles, X and Y, are 4 m apart.X has a charge of 2Q and Y has a charge of Q.The force of X on Y:

The units of 1/4 π\piπ 0 are:

To make an uncharged object have a negative charge we must:

Two particles A and B have identical charge Q.For a net force of zero to be exerted on a third charged particle it must be placed:

A wire contains a steady current of 2 A.The charge that passes a cross section in 2 s is:

A conductor is distinguished from an insulator with the same number of atoms by the number of:

Which of the following is NOT a possible value for the electric charge on an object?

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The units of 1/4 $\pi$ $The units of 1/4 \pi <sub>0</sub> are:$ ₀ are: