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WorksheetsElectricity Test
Total questions: 23
Worksheet time: 12mins
How much work is done in moving 5.0 coulombs of charge against a potential difference of 12 volts?
2.4 J
12 J
60 J
30 J
A device operating at a potential difference of 1.5 volts draws a current of 0.20 ampere. How much energy is used by the device in 60. seconds?
4.5 J
18 J
12 J
8.0 J
What is the current in an electric circuit if 10. coulombs of charge are transferred through the circuit in 5.0 seconds?
50 A
15 A
2.0 A
0..50 A
A wire carries a current of 2.0 amperes. How many electrons pass a given point in this wire in 1.0 second?
2 x 1019
2 x 1018
1.3 x 1018
1.3 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 6.0-ohm resistor that obeys Ohm's Law is connected to a source of variable potential difference. When the applied voltage is decreased from 12 V to 6.0 V, the current passing through the resistor
is quadrupled
is doubled
is halved
remains the same
In a simple electric circuit, a 110-volt electric heater draws 2.0 amperes of current. The resistance of the heater is
220 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 200. seconds of operation?
3.0 x 103 J
9.0 x 103 J
1.5 x 104 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 15-ohm resistor is connected in parallel with a 30.-ohm resistor, what is the equivalent resistance?
15 ohms
10 ohms
45 ohms
2.0 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 5.0-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
In the diagram above, lamps L1 and L2 are connected to a constant voltage power supply. If lamp L1 burns out, the brightness of L2 will
remain the same
increase
decrease
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?
