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WorksheetsElectricity 1
Total questions: 15
Worksheet time: 49mins
Name
Class
Date
1.
The electric current supplied by a battery in a digital watch is 3.0 x 10-5 A. What is the quantity of charge that flow in 2 hours ?
a)
0.226 C
b)
0.216 C
c)
6.0 x 10-5 C
d)
3.6 x 10-3 C
2.
The charge flowing in an electric circuit in one minute is 3 C. What is the current in this circuit?
a)
0.05 A
b)
3.0 A
c)
20.0 A
d)
180.0 A
3.
It is observed that the candle flame is split into two different portions when put in an electric field as shown in the diagram above. Which of the following is true about the above observation?
a)
The split is not even because the electric field is weak.
b)
The split is not even because the charge produced is unbalanced.
c)
The split is not even because the positive charge is heavier and larger in size that they drag most of the flame along.
d)
The split is not even because negative charge is greater in mass compared to positive charge.
4.
In a demonstration to show electric fields, sesame seeds are used together with oil as shown in the diagram above. Why sesame seeds are used to show the pattern of electric fields?
a)
Sesame seeds are neutral
b)
Sesame seeds are lighter and smaller.
c)
Sesame seeds are not transparent.
d)
Sesame seeds can produce electric field.
5.
The diagram above shows a bird perched on a high voltage cable. The bird does not experience electrical shock because..
a)
The potential difference across its two legs are high.
b)
The resistance across its two legs are high.
c)
The body of the bird has low resistance.
d)
The current flowing through its body is very small.
6.
Which of the following factors does not influence the resistance of the wire?
a)
Length of wire
b)
Material of wire
c)
Cross sectional area of wire
d)
Hardness of wire
7.
Which of the following is an Ohmic conductor?
a)
Thermistor
b)
Bulb filament
c)
Vacuum diode
d)
Constantan wire
8.
Diagram above shows a fan speed regulator. Which physical quantity varies when the knob is turned?
a)
Power
b)
Voltage
c)
Resistance
d)
Electric current
9.
Diagram above shows an electrical circuit. The voltmeter reading is 8 V. What is the current flow through resistor R?
a)
2.0 A
b)
3.0 A
c)
4.0 A
d)
5.0 A
10.
Diagram above shows electric circuit that contains three similar resistors. Which of the following reading is correct?
a)
A1 = A2
b)
A1 > A2
c)
V1 = V2
d)
V1 > V2
11.
Diagram above shows an electric circuit. What is the reading of ammeter?
a)
14.3 A
b)
2.5 A
c)
1.6 A
d)
0.6 A
12.
Diagram above shows an electrical circuit. The reading of ammeter is
a)
0.30 A
b)
0.90 A
c)
1.20 A
d)
4.80 A
13.
Diagram above shows a series and a parallel circuit. Which statement is correct about the circuits?
a)
The bulbs in series circuit are brighter than the bulbs in parallel circuit.
b)
The effective resistance of the series circuit is larger than the effective resistance of the parallel circuit.
c)
The total voltage in the series circuit is higher than the total voltage in the parallel circuit.
d)
The total current flow in the series circuit is greater than the total current flow in the parallel circuit.
14.
Three different resistors are connected in series. Which statement is correct?
a)
Potential difference across each resistor is the same.
b)
Power dissipated by each resistor is the same.
c)
Effective resistance is smaller than individual.
d)
The current passing through each resistor is the same.
15.
What is the effective resistance of the above circuit?
a)
14.67 Ohm
b)
15.67 Ohm
c)
13 Ohm
d)
6.67 Ohm
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