WorksheetsPower Triangles - Ohms Law
Total questions: 10
Worksheet time: 20mins
Name
Class
Date
1.
What unit is used to measure current?
a)
Ohms
b)
Omega
c)
Volts
d)
Amps
2.
What unit is used to measure resistance?
a)
Ohms
b)
Omega
c)
Volts
d)
Amps
3.
What is the voltage of a circuit with 4 ohms of resistance and 3 amps of current?
a)
12 V
b)
21 V
c)
4/3 V
d)
3/4 V
4.
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
5.
How do you calculate voltage?
a)
Current X Resistance
b)
Resistance ÷ Current
c)
Current ÷ Resistance
d)
Measure it with a ruler
6.
What unit is used to measure the voltage?
a)
Ohms
b)
Omega
c)
Volts
d)
Amps
7.
An alarm clock draws 0.5 A of current when connected to a 120 volt circuit. Calculate its resistance.
a)
60Ω
b)
120Ω
c)
180Ω
d)
240Ω
8.
A circuit contains a 1.5 volt battery and a bulb with a resistance of 3 ohms. Calculate the current.
a)
0.5A
b)
1A
c)
1.5A
d)
2A
9.
Screwfix are selling showers rated at 8.5kw. What
would be the design current for a 230v domestic installation?
a)
40A
b)
29.62A
c)
42.31A
d)
36.95A
10.
I have three 1.8Kw heaters plugged in to a 230v circuit.
What would be the expected load be?
a)
32.43A
b)
23.47A
c)
38.6A
d)
10A
100 %
