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Worksheets3.1 Current and Potential Difference
Total questions: 10
Worksheet time: 21mins
A
B
C
D
Which pattern of the distribution for castor powder is formed when the switch is turned on ?
Remains at plate X
Move towards centre and remains at centre
Move towards Y and remains at Y
Move continuously between X and Y
Plate X - positive
Plate Y - negative
Plate X - positive
Plate Y - positive
Plate X - negative
Plate Y - positive
Plate X - negative
Plate Y - negative
When a test charge of 0.25 μC is placed in an electric field, it experiences a force of 0.18 N acting on it. Calculate the strength of the electric field experienced by the electric charge ?
0.72 NC-1
0.72 x 105 NC-1
7.2 x 105 NC-1
7.2 x 10-5 NC-1
The charge flowing in an electric circuit in one minute is 6.0 C. What is the current in this circuit ?
0.1 A
1.0 A
10.0 A
100.0 A
An electric current of 300 mA flows through a resistor in 6 seconds. How many electrons pass through the resistor ?
(Charge per electron = 1.60 x 10 -19 C)
3.750 x 1018
1.125 x 1019
3.750 x 1021
1.125 x 1022
An electric kettle labelled 220 V, 1000 W is used to boil water for 10 minutes. If the flowing current is 4.5 A, calculate the amount of charges that flow in the kettle.
225 C
675 C
1350 C
2700 C
Lightning is an example of electric current. In a typical lightning, the flash takes 0.2 s to transfer 109 J of energy across a voltage of 5 x 107 V. Use the information given, calculate the amount of charge transferred and the current flows in 0.2 s.
Q = 10 C , I = 100 A
Q = 20 C , I = 200 A
Q = 20 C , I = 100 A
Q = 10 C , I = 100 A
An electric kettle is used to boil water, it is found that the current that flows through the heating filament of the kettle is 5 A and the total charge that flows through the filament is 3000 C. What is the time taken to boil the water ?
10 s
15000 s
600 s
500 s
