WorksheetsElectricity calculations (V=IR, P=IV, Q=It)
Total questions: 14
Worksheet time: 1hrs 10mins
Name
Class
Date
1.
what is the power of a lamp whose current is 6 A and the voltage across it is 120 V?
a)
120 W
b)
720 W
c)
16 W
d)
10 W
2.
Which are the Equations for Power?
a)
Power = Energy Transferred / Time (P=E/t)
b)
Power = Work Done / Time (P=W/t)
c)
Power = Energy Transferred x Time (P=Et)
d)
Power = Work Done x Time (P=Wt)
3.
What is the Equation for Charge Flow?
a)
Charge Flow = Current x Time (Q=It)
b)
Charge Flow = Current / Time (Q=I/t)
c)
Charge Flow = Time / Current (Q=t/I)
4.
Potential difference (pd) / voltage equation
a)
V= IR
b)
c)
V = IR
5.
How much charge flows through a wire in 80s if the current is a constant 5.4A?
a)
432C
b)
360C
c)
524C
d)
344C
6.
If the current through a circuit is 2 A and the resistance of a light bulb in the circuit is 10 Ohms, what is the voltage difference across the light bulb?
a)
5 V
b)
12 V
c)
0.2 V
d)
20 V
7.
A correct statement of Ohm’s Law is:
a)
I= V R
b)
V ∝ I
c)
V = IR
d)
both b and c
8.
How many volts are in a circuit with a battery that has a resistance of 10 Ohms and a current of 2 Amps?
a)
.5 Volts
b)
5 Volts
c)
20 Volts
9.
Calculate the power rating of an electric toaster that uses 210 000 J while toasting bread for 140 s
a)
1500 J
b)
1200 W
c)
1500 W
d)
1300 J
10.
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
a)
25 V
b)
10 V
c)
2.5 V
d)
0.4 V
11.
How many Volts would we need to produce a current flow of 8 Amps through a 6 Ohm resistor
a)
12 volts
b)
24 volts
c)
1.3333
d)
48 volts
12.
This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?
a)
3 Amps
b)
192 Amps
c)
2 Amps
d)
4 Amps
13.
How many Volts would it take to push 1 Amp through a resistance of 1 Ohm
a)
10 volts
b)
1 volt
c)
48 volts
d)
5 volts
14.
What size resistor would produce a 3 Amp current flow with a 12 Volt battery
a)
1 Ohm
b)
3 Ohms
c)
4 Ohms
d)
12 Ohms
100 %
