Question 1

Heat a copper wire and its electric resistance

Accepted Answer

A)  decreases. 
B)  increases. 
C)  remains unchanged. 
A)  decreases. 
B)  increases. 
C)  remains unchanged.

Question 2

When a single charge q is placed at one corner of a square, the electric field at the center of the square is F/q. If two other equal charges are placed at the adjacent corners of the square, the electric
Field at the center of the square due to these three equal charges is

Accepted Answer

A)  F/(2q). 
B)  4F/q. 
C)  F/q. 
D)  F/(4q). 
E)  None of the above choices are correct. 
A)  F/(2q). 
B)  4F/q. 
C)  F/q. 
D)  F/(4q). 
E)  None of the above choices are correct.

Question 3

The electrical force on a 2-C charge is 60 N. What is the value of the electric field at the place where the charge is located?

Accepted Answer

A)  20 N/C 
B)  120 N/C 
C)  60 N/C 
D)  30 N/C 
E)  240 N/C 
A)  20 N/C 
B)  120 N/C 
C)  60 N/C 
D)  30 N/C 
E)  240 N/C

Question 4

The primary source of electrons in an ordinary electrical circuit is

Accepted Answer

A)  the power station generator. 
B)  a dry cell, wet cell or battery. 
C)  the electrical circuit itself. 
D)  the back emf of motors. 
E)  none of these 
A)  the power station generator. 
B)  a dry cell, wet cell or battery. 
C)  the electrical circuit itself. 
D)  the back emf of motors. 
E)  none of these

Question 5

A capacitor is useful in

Accepted Answer

A)  smoothing pulsed current. 
B)  increasing the current in a resistor. 
C)  increasing or decreasing voltage. 
D)  switching dc to ac in a circuit. 
E)  boosting the energy output of a circuit. 
A)  smoothing pulsed current. 
B)  increasing the current in a resistor. 
C)  increasing or decreasing voltage. 
D)  switching dc to ac in a circuit. 
E)  boosting the energy output of a circuit.

Question 6

Two charged particles attract each other with a force F. If the charges of both particles are doubled, and the distance between them also doubled, then the force of attraction will be

Accepted Answer

A)  F/2. 
B)  2 F. 
C)  F. 
D)  F/4. 
E)  none of these 
A)  F/2. 
B)  2 F. 
C)  F. 
D)  F/4. 
E)  none of these

Question 7

Strip electrons from an atom and the atom becomes a

Accepted Answer

A)  molecule. 
B)  negative ion. 
C)  positive ion. 
D)  different element. 
A)  molecule. 
B)  negative ion. 
C)  positive ion. 
D)  different element.

Question 8

In an electric circuit, the safety fuse is connected to the circuit in

Accepted Answer

A)  series. 
B)  parallel. 
C)  either series or parallel. 
A)  series. 
B)  parallel. 
C)  either series or parallel.

Question 9

Two protons attract each other gravitationally and repel each other electrically. By far the greater force is

Accepted Answer

A)  the gravitational attraction. 
B)  the electrical repulsion. 
C)  neither - the forces are the same. 
A)  the gravitational attraction. 
B)  the electrical repulsion. 
C)  neither - the forces are the same.

Question 10

A 4-ohm resistor is connected in parallel with a 6-ohm resistor. This combination produces an equivalent resistance of

Accepted Answer

A)  10 ohms. 
B)  2.4 ohms. 
C)  4 ohms. 
D)  5.5 ohms. 
E)  5 ohms. 
A)  10 ohms. 
B)  2.4 ohms. 
C)  4 ohms. 
D)  5.5 ohms. 
E)  5 ohms.

Question 11

Two charged particles held close to each other are released. As they move, the force on each particle increases. Therefore, the particles must have

Accepted Answer

A)  the same size. 
B)  opposite signs. 
C)  the same mass. 
D)  the same sign. 
E)  impossible to answer without additional information 
A)  the same size. 
B)  opposite signs. 
C)  the same mass. 
D)  the same sign. 
E)  impossible to answer without additional information

Question 12

What condition must exist between two points in a conductor in order to maintain a flow of charge

Accepted Answer

A)  a switch connected in series. 
B)  a high resistance. 
C)  a steady magnetic field. 
D)  All of the above choices are correct. 
E)  None of the above choices are correct. 
A)  a switch connected in series. 
B)  a high resistance. 
C)  a steady magnetic field. 
D)  All of the above choices are correct. 
E)  None of the above choices are correct.

Question 13

When a light switch is turned on in a dc circuit, the average speed of electrons in the lamp is

Accepted Answer

A)  less than 1 cm/s. 
B)  the speed of sound waves in metal. 
C)  1000 cm/s. 
D)  the speed of light. 
E)  dependent on how quickly each electron bumps into the next electron. 
A)  less than 1 cm/s. 
B)  the speed of sound waves in metal. 
C)  1000 cm/s. 
D)  the speed of light. 
E)  dependent on how quickly each electron bumps into the next electron.

Question 14

When a pair of 1-ohm resistors are connected in series, their combined resistance is

Accepted Answer

A)  2 ohms, and when in parallel, 1 ohm. 
B)  1 ohm, and when connected in parallel, 2 ohms. 
C)  2 ohms, and when in parallel, 1/2 ohm. 
D)  1/2 ohm, and when in parallel, 2 ohms. 
E)  none of these 
A)  2 ohms, and when in parallel, 1 ohm. 
B)  1 ohm, and when connected in parallel, 2 ohms. 
C)  2 ohms, and when in parallel, 1/2 ohm. 
D)  1/2 ohm, and when in parallel, 2 ohms. 
E)  none of these

Question 15

You can touch a 100,000-volt Van de Graaff generator with little harm because although the voltage is high, the relatively small amount of charge means there is a relatively small amount of

Accepted Answer

A)  polarization. 
B)  conduction. 
C)  energy. 
D)  electric field. 
A)  polarization. 
B)  conduction. 
C)  energy. 
D)  electric field.

Question 16

The electrical force between charges is strongest when the charges are

Accepted Answer

A)  far apart. 
B)  close together. 
C)  The electric force is constant everywhere. 
A)  far apart. 
B)  close together. 
C)  The electric force is constant everywhere.

Question 17

A negatively charged rod is held near a metal can that rests on a dry wood table. If you touch the opposite side of the can momentarily with your finger the can is then

Accepted Answer

A)  negatively charged. 
B)  positively charged. 
C)  partially discharged. 
D)  completely discharged. 
E)  discharged only on the side touched. 
A)  negatively charged. 
B)  positively charged. 
C)  partially discharged. 
D)  completely discharged. 
E)  discharged only on the side touched.

Question 18

When a 60-watt light bulb is connected to a 120-volt source the current in the light bulb is

Accepted Answer

A)  0.25 A. 
B)  0.5 A. 
C)  4 A. 
D)  2 A. 
E)  more than 4 A. 
A)  0.25 A. 
B)  0.5 A. 
C)  4 A. 
D)  2 A. 
E)  more than 4 A.

Question 19

Two charges separated by one meter exert 1-N forces on each other. If the charges are pulled to 3-m separation distance, the force on each charge will be

Accepted Answer

A)  0.11 N. 
B)  9 N. 
C)  0 N. 
D)  0.33 N. 
E)  3 N. 
A)  0.11 N. 
B)  9 N. 
C)  0 N. 
D)  0.33 N. 
E)  3 N.

Question 20

An electron is pushed into an electric field where it acquires a 1-V electrical potential. If two electrons are pushed the same distance into the same electric field, the electrical potential of the two
Electrons is

Accepted Answer

A)  0.5 V. 
B)  0.25 V. 
C)  1 V. 
D)  2 V. 
E)  4 V. 
A)  0.5 V. 
B)  0.25 V. 
C)  1 V. 
D)  2 V. 
E)  4 V.

Heat a copper wire and its electric resistance

When a single charge q is placed at one corner of a square, the electric field at the center of the square is F/q. If two other equal charges are placed at the adjacent corners of the square, the electric Field at the center of the square due to these three equal charges is

The electrical force on a 2-C charge is 60 N. What is the value of the electric field at the place where the charge is located?

The primary source of electrons in an ordinary electrical circuit is

A capacitor is useful in

Two charged particles attract each other with a force F. If the charges of both particles are doubled, and the distance between them also doubled, then the force of attraction will be

Strip electrons from an atom and the atom becomes a

In an electric circuit, the safety fuse is connected to the circuit in

Two protons attract each other gravitationally and repel each other electrically. By far the greater force is

A 4-ohm resistor is connected in parallel with a 6-ohm resistor. This combination produces an equivalent resistance of

Two charged particles held close to each other are released. As they move, the force on each particle increases. Therefore, the particles must have

What condition must exist between two points in a conductor in order to maintain a flow of charge

When a light switch is turned on in a dc circuit, the average speed of electrons in the lamp is

When a pair of 1-ohm resistors are connected in series, their combined resistance is

You can touch a 100,000-volt Van de Graaff generator with little harm because although the voltage is high, the relatively small amount of charge means there is a relatively small amount of

The electrical force between charges is strongest when the charges are

A negatively charged rod is held near a metal can that rests on a dry wood table. If you touch the opposite side of the can momentarily with your finger the can is then

When a 60-watt light bulb is connected to a 120-volt source the current in the light bulb is

Two charges separated by one meter exert 1-N forces on each other. If the charges are pulled to 3-m separation distance, the force on each charge will be

An electron is pushed into an electric field where it acquires a 1-V electrical potential. If two electrons are pushed the same distance into the same electric field, the electrical potential of the two Electrons is

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Exam 10: Static and Current Electricity

Heat a copper wire and its electric resistance

When a single charge q is placed at one corner of a square, the electric field at the center of the square is F/q. If two other equal charges are placed at the adjacent corners of the square, the electric Field at the center of the square due to these three equal charges is

The electrical force on a 2-C charge is 60 N. What is the value of the electric field at the place where the charge is located?

The primary source of electrons in an ordinary electrical circuit is

A capacitor is useful in

Two charged particles attract each other with a force F. If the charges of both particles are doubled, and the distance between them also doubled, then the force of attraction will be

Strip electrons from an atom and the atom becomes a

In an electric circuit, the safety fuse is connected to the circuit in

Two protons attract each other gravitationally and repel each other electrically. By far the greater force is

A 4-ohm resistor is connected in parallel with a 6-ohm resistor. This combination produces an equivalent resistance of

Two charged particles held close to each other are released. As they move, the force on each particle increases. Therefore, the particles must have

What condition must exist between two points in a conductor in order to maintain a flow of charge

When a light switch is turned on in a dc circuit, the average speed of electrons in the lamp is

When a pair of 1-ohm resistors are connected in series, their combined resistance is

You can touch a 100,000-volt Van de Graaff generator with little harm because although the voltage is high, the relatively small amount of charge means there is a relatively small amount of

The electrical force between charges is strongest when the charges are

A negatively charged rod is held near a metal can that rests on a dry wood table. If you touch the opposite side of the can momentarily with your finger the can is then

When a 60-watt light bulb is connected to a 120-volt source the current in the light bulb is

Two charges separated by one meter exert 1-N forces on each other. If the charges are pulled to 3-m separation distance, the force on each charge will be

An electron is pushed into an electric field where it acquires a 1-V electrical potential. If two electrons are pushed the same distance into the same electric field, the electrical potential of the two Electrons is

About Science

Atoms

Equilibrium and Linear Motion

Newtons Laws of Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

Fluid Mechanics

Temperature, Heat, and Thermodynamics

Heat Transfer and Change of Phase

Magnetism and Electromagnetic Induction

Waves and Sound

Light Waves

Properties of Light

Quantum Theory

The Atomic Nucleus and Radioactivity

Physics of Rotation and Equilibrium

Filters