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Name: ____________________________________
Resistance, Current, Voltage, Power and Energy Worksheet
Q = charge (C)
I = current (A)
t = time (s)
E = energy (J)
P = power (W)
V = voltage (V)
R = resistance (Ohm or
))
1) The total amount of charge that passes through a wire's full cross section at any point per
unit of time is referred to as _____________________.
A) voltage
B) current
C) electric potential
D) wattage.
2) The resistance of a wire is defined as ______________________.
A) I x V
B) V/I
C) I/V
D) none of the given answers
3) What is 1 Ω equivalent to?
A) 1 V∙A
B) 1 W/A
C) 1 J/s
D) 1 V/A
4) What is 1 W equivalent to?
A) 1 V/Ω
B) 1 Ω∙A
C) 1 V∙A
D) 1 V/A
5) A kilowatt-hour is equivalent to
A) 3,600,000 J/s
B) 1000 W
C) 3600 s
D) 3,600,000 J.
6) How much charge must pass by a point in 10 s for the current to be 0.50 A?
A) 0.050 C
B) 5.0 C
C) 20 C
D) 2.0 C
7) What potential difference is required to cause 4.00 A to flow through a resistance of 330
Ω?
A) 334 V
B) 12.1 V
C) 1320 V
D) 82.5 V
8) What is the voltage across a 5.0Ω resistor if the current through it is 5.0 A?
A) 25 V
B) 4.0 V
C) 100 V
D) 1.0 V
9) A light bulb operating at 110 V draws 1.40 A of current. What is its resistance?
A) 109 Ω
B) 78.6 Ω
C) 12.7 Ω
D) 154 Ω
10) 5.00 A is flowing through an 10.0 Ω resistor. How much power is being dissipated?
A) 50.0 W
B) 500 W
C) 250 W
D) 2.50 kW
11) A 110-V hair dryer is rated at 1200 W. What current will it draw?
A) 0.090 A
B) 1.0 A
C) 12 A
D) 11 A
12) A lamp uses a 150-W bulb. If it is used at 120 V, what current does it draw?
A) 1.25 A
B) 0.800 A
C) 8 kA
D) 150 A
13) How much does it cost to operate a 25-W soldering iron for 8.0 hours, if energy costs
$0.08/kWh?
A) $0.25
B) $1.50
C) $0.16
D) $0.016
14) A 100-W driveway light bulb is on 10 hours per day. Assuming the power company
charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate
the bulb.
A) $73.00
B) $3.65
C) $7.30
D) $36.50
15) Label which circuit is in series and which is in parallel:
16) Label which circuit is in series and which is in parallel:
17) Draw a series circuit with one 9 Volt battery, 1 resistor and a current of 0.5 A. What is the
resistance of the resistor?
18) Are the circuits below in series or in parallel?
___________________________
_____________________________
19) Use the following terms to label the circuit diagram below: power source, switch, light
bulb, and wire.
20) Use the following terms to label the circuit diagram below: power source, resistors,
ammeter, voltmeter, light bulb, and switch.