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WorksheetsElectricity and Magnetism Regents Review
Total questions: 40
Worksheet time: 20mins
How much work is done in moving 5.0 coulombs of charge against a potential difference of 10 volts?
2 J
12 J
50 J
0.5 J
A device operating at a potential difference of 1.5 volts draws a current of 0.10 ampere. How much energy is used by the device in 60. seconds?
4 J
9 J
0.15 J
6 J
What is the current in an electric circuit if 20. coulombs of charge are transferred through the circuit in 5.0 seconds?
100 A
25 A
4.0 A
0.50 A
A wire carries a current of 2.0 amperes. How many electrons pass a given point in this wire in 2.0 second?
2 x 1019
2 x 1018
1.3 x 1018
2.5 x 1019
A complete circuit is left on for several minutes, causing the connecting copper wire to become hot. As the temperature of the wire increases, the electrical resistance of the wire
remains the same
decreases
increases
A manufacturer recommends that the longer the extension cord used with an electric drill, the thicker (heavier gauge) the extension cord should be. This recommendation is made because the resistance of a wire varies
inversely with both length and cross-sectional area
directly with both length and cross-sectional area
directly with length and inversely with cross-sectional area
inversely with length and directly with cross-sectional area
A 0.500-meter length of wire with a cross-sectional area of 3.14 x 10-6 meters squared is found to have a resistance of 2.53 x 10-3 ohms. According to the resistivity chart, the wire could be made of
copper
nichrome
silver
aluminum
What must be inserted between points A and B to establish a steady electric current in the incomplete circuit represented in the diagram above?
magnetic field source
voltmeter
switch
source of potential difference
A 16.0-ohm resistor that obeys Ohm's Law is connected to a source of variable potential difference. When the applied voltage is decreased from 24 V to 12.0 V, the current passing through the resistor
is quadrupled
is doubled
is halved
remains the same
In a simple electric circuit, a 240-volt electric heater draws 2.0 amperes of current. The resistance of the heater is
120 ohms
28 ohms
55 ohms
0.018 ohms
An immersion heater has a resistance of 5.0 ohms while drawing a current of 3.0 amperes. How much electrical energy is delivered to the heater during 100. seconds of operation?
3.0 x 103 J
9.0 x 103 J
4.5 x 103 J
6.0 x 103 J
Which graph best represents the relationship between the potential difference across a conductor and the current through the conductor at constant temperature?
The potential difference applied to a circuit element remains constant as the resistance of the element is varied. Which graph best represents the relationship between power (P) and resistance (R) of this element?
A 30.-ohm resistor and a 60.-ohm resistor are connected in an electric circuit as shown above. Compared to the electric current through the 30.-ohm resistor, the electric current through the 60.-ohm resistor is
the same
larger
smaller
If a 20-ohm resistor is connected in parallel with a 40.-ohm resistor, what is the equivalent resistance?
15 ohms
10 ohms
45 ohms
13.3 ohms
A 9.0-volt battery is connected to a 4.0-ohm resistor and a 5.0-ohm resistor as shown in the diagram above. What is the current in the 4.0-ohm resistor?
4.0 A
1.8 A
2.3 A
1.0 A
The diagram above shows a circuit with two resistors.
What is the reading on ammeter A?
1.3 A
0.75 A
1.5 A
3.0 A
In the circuit shown above, voltmeter V2 reads 80. volts.
What is the reading of voltmeter V1?
40 V
20 V
160 V
80 V
While operating at 120 volts, an electric toaster has a resistance of 15 ohms. What is the power used by the toaster?
1.0 W
960 W
1,800 W
120 W
The diagram above shows two resistors and three ammeters connected to a voltage source. What is the potential difference across the source in the circuit shown?
60 V
220 V
120 V
440 V
The diagram above shows two resistors and three ammeters connected to a voltage source. What is the current reading of ammeter A1 in the circuit shown?
4.0 A
3.0 A
10.0 A
6.0 A
Which circuit diagram shows voltmeter V and ammeter A correctly positioned to measure the total potential difference of the circuit and the current through each resistor?
During a physics lab, a plastic strip was rubbed with cotton and became positively charged. The correct explanation for why the plastic strip becomes positively charged is that ...
the plastic strip acquired extra protons from the cotton.
the plastic strip acquired extra protons from the charging process
protons were created as the result of the charging process
the plastic strip lost electrons to the cotton during the charging process
Two electrically charged identical-sized metal spheres, A (charge of -4) and B (charge of +8). If the spheres are brought into contact, which sphere will have a net gain of electrons?
both A and B
neither
only A
only B
A positively charged rod is held near the knob of a neutral electroscope. What best describes what will happen to the leaves?
the leaves will spread apart and be positive
the leaves will spread apart and be negative
the leaves will stay closed and be positive
the leaves will stay closed and be negative
Which net charge could be found on an object?
4.8 x 10-19 C
1.8 x 10-19 C
3.0 x 10-19 C
2.8 x 10-19 C
Metal sphere A has a charge of +12 elementary charges and identical sphere B has a charge of +16 elementary charges. After the two spheres are brought into contact and separated, the charge on sphere A is
+14 elementary charges
+28 elementary charges
+2 elementary charges
-2 elementary charges
Electrostatic force F exists between two point charges. If the both charges are doubled, the force between the charges will be
F
4F
2F
F/4
Two similar metal spheres, A and B, have charges of +2.0 x 10-6 coulomb and +1.0 x 10-6 coulomb, respectively. The magnitude of the electrostatic force on A due to B is 4.0N newtons. What is the magnitude of the electrostatic force on B due to A?
2.0N
4.0N
8.0N
1.0N
Which graph best represents the relationship between the magnitude of the electrostatic force and the distance between two oppositely charged particles?
Two positively charged masses are separated by a distance, r. Which statement best describes the gravitational and electrostatic forces between the two masses?
The gravitational force is attractive and the electrostatic force is
repulsive.
The gravitational force is repulsive and the electrostatic force is
attractive.
Both forces are attractive.
Both forces are repulsive.
What is the approximate electrostatic force between two protons separated by a distance of 1.0 x 10-6 meter?
9.0 x 1021 N and attractive
9.0 x 1021 N and repulsive
2.3 x 10-16 N and attractive
2.3 x 10-16 N and repulsive
Consider the electric field lines shown in the diagram below. From the diagram, it is apparent that object A is ____ and object B is ____.
+,+
+,-
-,+
-,-
Which of the following is a true statement about the electric field between the two plates?
The field is attractive between the plates and uniform in strength
The field is repulsive between the plates and uniform in strength
The field is attractive between the plates and strongest near the positive
The field is repulsive between the plates and strongest near the positive
At which point is the electric field the strongest
A
B
C
D
What is the magnitude of the electric field intensity at a point where a proton experiences an electrostatic force of magnitude 2.30 x 10-25 newton?
1.44 x 10-6 N/C
1.44 x 1044 N/C
3.68 x 10-44 N/C
3.68 x 106 N/C
Which particle would produce a magnetic field?
a neutral particle moving in a straight line
a stationary charged particle
a moving charged particle
a neutral particle moving in a circle
Which diagram best represents magnetic flux lines around a bar magnet?
A student sprinkled iron filings around a bar magnet and observed that the filings formed the pattern shown above. The magnetic field is strongest at point
A
B
C
D
Which diagram best represents a magnetic field between two magnetic poles?
