Question 1

A system of a proton and a neutron has a net charge of

Accepted Answer

A)  +1.6 × 10-19 C. 
B)  -1.6 × 10-19 C. 
C)  3.2 × 10-19 C. 
D)  zero. 
A)  +1.6 × 10-19 C. 
B)  -1.6 × 10-19 C. 
C)  3.2 × 10-19 C. 
D)  zero.

Question 2

The angle between true north and the direction in which a compass needle points is called the angle of

Accepted Answer

A)  attack. 
B)  inclination. 
C)  declination. 
D)  dip. 
A)  attack. 
B)  inclination. 
C)  declination. 
D)  dip.

Question 3

The expression that mathematically describes the force between two static electric charges is called ______________.

Accepted Answer

The answer of The expression that mathematically describes the force...

Question 4

A moving electric charge or a current in a magnetic field may experience a(n)______________.

Accepted Answer

The answer of A moving electric charge or a current...

Question 5

An object that is positively charged will

Accepted Answer

A)  repel a rubber rod stroked with fur. 
B)  repel a glass rod stroked with silk. 
C)  be polarized. 
D)  none of these 
A)  repel a rubber rod stroked with fur. 
B)  repel a glass rod stroked with silk. 
C)  be polarized. 
D)  none of these

Question 6

A transformer with 800 turns on the primary coil is used to decrease the voltage from 2000 V to 120 V for home use.How many turns should be in the secondary coil?

Accepted Answer

The answer of A transformer with 800 turns on the...

Question 7

A doorbell has an input voltage of 120 V.A transformer that steps the voltage down to 12 V has 500 turns on its primary.What is the number of turns on the secondary?

Accepted Answer

The answer of A doorbell has an input voltage of...

Question 8

A(n)______________ converts electrical energy into mechanical energy.

Accepted Answer

The answer of A(n)______________ converts electrical energy into mechanical energy....

Question 9

One ampere × one second is a unit of

Accepted Answer

A)  power. 
B)  current. 
C)  voltage. 
D)  electric charge. 
E)  resistance. 
A)  power. 
B)  current. 
C)  voltage. 
D)  electric charge. 
E)  resistance.

Question 10

Consider a wire in a magnetic field,as shown in the following figure,with a current flowing downward through it.What will happen to the wire?

Accepted Answer

A)  The wire will be forced toward the north pole. 
B)  The wire will be forced perpendicular to the plane of the magnetic field, into the page. 
C)  The wire will be forced perpendicular to the plane of the magnetic field, out of the page. 
D)  The current will cease flowing. 
E)  The wire will be forced toward the south pole. 
A)  The wire will be forced toward the north pole. 
B)  The wire will be forced perpendicular to the plane of the magnetic field, into the page. 
C)  The wire will be forced perpendicular to the plane of the magnetic field, out of the page. 
D)  The current will cease flowing. 
E)  The wire will be forced toward the south pole.

Question 11

If the voltage across a resistor is tripled,the current will

Accepted Answer

A)  remain the same. 
B)  be cut to one-third. 
C)  be cut by one-third. 
D)  be tripled. 
E)  be multiplied by nine. 
A)  remain the same. 
B)  be cut to one-third. 
C)  be cut by one-third. 
D)  be tripled. 
E)  be multiplied by nine.

Question 12

Consider a wire in a magnetic field,as shown in the following figure,with a current flowing through it.What will happen to the wire?

Accepted Answer

A)  The wire will be forced toward the north pole. 
B)  The wire will be forced perpendicular to the plane of the magnetic field. 
C)  The current will cease flowing. 
D)  Nothing will happen. 
A)  The wire will be forced toward the north pole. 
B)  The wire will be forced perpendicular to the plane of the magnetic field. 
C)  The current will cease flowing. 
D)  Nothing will happen.

Question 13

The maximum current would flow in a set of resistors connected in ______________.

Accepted Answer

The answer of The maximum current would flow in a...

Question 14

If the voltage across a resistor is doubled,the current will

Accepted Answer

A)  remain the same. 
B)  be cut to one-fourth. 
C)  be cut in half. 
D)  be doubled. 
E)  be quadrupled. 
A)  remain the same. 
B)  be cut to one-fourth. 
C)  be cut in half. 
D)  be doubled. 
E)  be quadrupled.

Question 15

In a conductor,what moves?

Accepted Answer

A)  Electrons 
B)  Neutrons 
C)  Quarks 
D)  Protons 
A)  Electrons 
B)  Neutrons 
C)  Quarks 
D)  Protons

Question 16

In a 12-V battery circuit,a 10-Ω resistor and a 30-Ω resistor are connected in series.How much current does the battery supply to the circuit?

Accepted Answer

The answer of In a 12-V battery circuit,a 10-Ω resistor...

Question 17

A system of an electron,a proton,and a neutron has a net charge of

Accepted Answer

A)  +1.6 × 10-19 C. 
B)  -1.6 × 10-19 C. 
C)  3.2 × 10-19 C. 
D)  zero. 
A)  +1.6 × 10-19 C. 
B)  -1.6 × 10-19 C. 
C)  3.2 × 10-19 C. 
D)  zero.

Question 18

A 20-Ω resistor and a 30-Ω resistor are wired in parallel and connected to a 9.0-V battery.
a. How much current is drawn from the battery?
b. How much power is dissipated in the circuit?

Accepted Answer

The answer of A 20-Ω resistor and a 30-Ω resistor...

Question 19

A(n)______________ is an elementary particle with a charge of -1.6 × 10-19 C.

Accepted Answer

A)  electron 
B)  neutron 
C)  proton 
D)  atom 
A)  electron 
B)  neutron 
C)  proton 
D)  atom

Question 20

A system of an electron and a neutron has a net charge of

Accepted Answer

A)  +1.6 × 10-19 C. 
B)  -1.6 × 10-19 C. 
C)  3.2 × 10-19 C. 
D)  zero. 
A)  +1.6 × 10-19 C. 
B)  -1.6 × 10-19 C. 
C)  3.2 × 10-19 C. 
D)  zero.

Exam 8: Electricity and Magnetism

A system of a proton and a neutron has a net charge of

The angle between true north and the direction in which a compass needle points is called the angle of

The expression that mathematically describes the force between two static electric charges is called ______________.

A moving electric charge or a current in a magnetic field may experience a(n)______________.

An object that is positively charged will

A transformer with 800 turns on the primary coil is used to decrease the voltage from 2000 V to 120 V for home use.How many turns should be in the secondary coil?

A doorbell has an input voltage of 120 V.A transformer that steps the voltage down to 12 V has 500 turns on its primary.What is the number of turns on the secondary?

A(n)______________ converts electrical energy into mechanical energy.

One ampere × one second is a unit of

Consider a wire in a magnetic field,as shown in the following figure,with a current flowing downward through it.What will happen to the wire?

If the voltage across a resistor is tripled,the current will

Consider a wire in a magnetic field,as shown in the following figure,with a current flowing through it.What will happen to the wire?

The maximum current would flow in a set of resistors connected in ______________.

If the voltage across a resistor is doubled,the current will

In a conductor,what moves?

In a 12-V battery circuit,a 10-Ω resistor and a 30-Ω resistor are connected in series.How much current does the battery supply to the circuit?

A system of an electron,a proton,and a neutron has a net charge of

A 20-Ω resistor and a 30-Ω resistor are wired in parallel and connected to a 9.0-V battery. a. How much current is drawn from the battery? b. How much power is dissipated in the circuit?

A(n)______________ is an elementary particle with a charge of -1.6 × 10-19 C.

A system of an electron and a neutron has a net charge of

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A(n)______________ is an elementary particle with a charge of -1.6 × 10^-19 C.