Transcript 16 volt

Whack-a-Mole
1. If 20 Joules of work is used to transfer 20
coulombs of charge through a 20-Ohm
resistor, the potential difference across the
resistor is
A.
B.
C.
D.
1V
20 V
0.05 V
400 V
2. What is the maximum amount of work that a
6000. - Watt motor can do in 10 seconds?
A.
B.
C.
D.
6.0 x 101 J
6.0 x 102 J
6.0 x 103 J
6.0 x 104 J
3. Three resistors, 4 ohms, 6 ohms, and 8 ohms,
are connected in parallel in an electric circuit.
The equivalent resistance of the circuit is
A.
B.
C.
D.
Less than 4 W
Between 4 W and 8 W
Between 10. W and 18 W
18 W
4. An electric circuit contains a variable resistor
connected to a source of constant voltage. As
the resistance of the variable resistor is
increased, the power dissipated in the circuit
A. Decreases
B. Increases
C. Remains the same
5. An electron is located in the electric field between two
parallel metal plates as shown in the diagram below.
If the electron is attracted to plate A, then plate A is charged
A.
positively, and the electric field is directed from plate A toward plate B
B.
positively, and the electric field is directed from plate B toward plate A
C.
negatively, and the electric field is directed from plate A toward plate B
D.
negatively, and the electric field is directed from plate B toward plate A
6. A potential difference of 10.0 volts exists
between two points, A and B, within an electric
field. What is the magnitude of charge that
requires 2.0 x 10–2 joule of work to move it
from A to B?
A.
B.
C.
D.
5.0 x 102 C
2.0 x 10-1 C
5.0 x 10-2 C
2.0 x 10-3 C
7. A circuit consists of a resistor and a battery.
Increasing the voltage of the battery while
keeping the temperature of the circuit constant
would result in an increase in
A.
B.
C.
D.
current, only
resistance, only
both current and resistance
neither current nor resistance
8. Charge flowing at the rate of 2.50 x 1016
elementary charges per second is equivalent
to a current of
A.
B.
C.
D.
2.50 x 1013 A
6.25 x 105 A
4.00 x 10-3 A
2.50 x 10-3 A
9. An electric drill operating at 120. volts draws a
current of 3.00 amperes. What is the total
amount of electrical energy used by the drill
during 1.00 minute of operation?
A.
B.
C.
D.
2.16 x 104 J
2.40 x 103 J
3.60 x 102 J
4.00 x 101 J
10. Two small identical metal spheres, A and B, on
insulated stands, are each given a charge of +2.0 ×
10–6 coulomb. The distance between the spheres is
2.0 × 10–1 meter. The magnitude of the electrostatic
force that the charge on sphere A exerts on the charge
on sphere B is
A. 1.80 x 105 N
B. 8.99 x 105 N
C. 1.80 x 10-1 N
D. 8.99 x 10-1 N
11. A 10.0-meter length of copper wire is at 20°C.
The radius of the wire is 1.0 x 10–3 meter. The
cross-sectional area of the wire is
A.
B.
C.
D.
3.14 m2
3.14 x 10-3 m2
3.14 x 10-6 m2
7.85 x 10-7 m2
12. A 10.0-meter length of copper wire is at 20°C.
The radius of the wire is 1.0 x 10–3 meter. The
resistance of the wire is
A.
B.
C.
D.
0W
5.5 x 10-2 W
5.5 x 10-3 W
18.3 W
13. The electrical resistance of a metallic
conductor is inversely proportional to its
A.
B.
C.
D.
Temperature
Length
Cross-sectional area
resistivity
14. In a simple electric circuit, a 24-ohm resistor is
connected across a 6.0-volt battery. What is
the current in the circuit?
A.
B.
C.
D.
1.0 A
0.25 A
140 A
4.0 A
15. An operating 100.-watt lamp is connected to a
120-volt outlet. What is the total electrical
energy used by the lamp in 60. seconds?
A.
B.
C.
D.
0.60 J
1.7 J
6.0 x 103 J
7.2 x 103 J
16. Two oppositely charged parallel metal plates,
1.00 centimeter apart, exert a force with a
magnitude of 3.60 x 10-15 newton on an
electron placed between the plates. The
potential difference between the plates is
A. 2.25 x 102 V
B. 4.44 x 10-3 V
C. 2.25 V
D. 3.60 x 10-17 V
17. A beam of electrons is directed into the electric field
between two oppositely charged parallel plates, as
shown in the diagram below.
The electrostatic force exerted on the electrons by the
electric field is directed
A.
B.
C.
D.
Into the page
Out of the page
Toward the bottom of the page
Toward the top of the page
18. A 15-ohm resistor, R1, and a 30.-ohm resistor, R2, are
to be connected in parallel between points A and B in a
circuit containing a 90.-volt battery.
Which of the following images is correct
19. A 15-ohm resistor, R1, and a 30.-ohm resistor,
R2, are to be connected in parallel between
points A and B in a circuit containing a 90.-volt
battery as seen in the figure below. The
potential difference across R1 is
A.
B.
C.
D.
90 V
90 W
30 V
30 W
R1
R2
20. A 15-ohm resistor, R1, and a 30.-ohm resistor,
R2, are to be connected in parallel between
points A and B in a circuit containing a 90.-volt
battery as seen in the figure below. The current
flowing through R1 is
A. 2.0 A
B. 3.0 A
C. 6.0 A
D. 90. A
R1
R2
21. A constant potential difference is applied
across a variable resistor held at constant
temperature. Which graph best represents the
relationship between the resistance of the
variable resistor and the current through it?
22. A 3.0-ohm resistor and a 6.0-ohm resistor are
connected in series in an operating electric
circuit. If the current through the 3.0-ohm
resistor is 4.0 amperes, what is the potential
difference across the 6.0-ohm resistor?
A. 8.0 V
B. 2.0 V
C. 12. V
D. 24. V
23. Which combination of resistors has the
smallest equivalent resistance.
24. Two oppositely charged parallel metal plates,
1.00 centimeter apart, exert a force with a
magnitude of 3.60 x 10-15 newton on an
electron placed between the plates. The
magnitude of the electric field strength
between the plates is
A.
B.
C.
D.
5.76 x 10-34 N/C
2.25 x 104 N/C
2.25 N/C
4.44 x 10-5 N/C