1.
Electric power is the rate of:
A
Charge flow
B
Energy consumption
C
Voltage change
D
Resistance increase
2.
Which graph is used to verify Ohm’s Law experimentally?
A
I versus R
B
V versus R
C
V versus I
D
R versus T
3.
The internal resistance of a cell causes:
A
Increase in terminal voltage
B
Decrease in terminal voltage
C
No effect
D
Infinite current
4.
Ohm’s law states that current is directly proportional to:
A
Resistance
B
Voltage
C
Power
D
Energy
5.
Electric energy consumed is usually measured in:
A
Joule
B
Watt
C
Kilowatt-hour
D
Volt
6.
Which instrument is used to measure potential difference?
A
Ammeter
B
Voltmeter
C
Ohmmeter
D
Galvanometer
7.
Which component is used to control the flow of electric current in a circuit?
A
Switch
B
Resistor
C
Battery
D
Bulb
8.
The main source of electricity in homes is:
A
Battery
B
Generator
C
Power station
D
Solar cell only
9.
When identical cells are connected in parallel, the total EMF is:
A
Zero
B
Equal to one cell
C
Double
D
Half
10.
The main advantage of AC over DC is that it can be:
A
Stored easily
B
Transmitted over long distances easily
C
Produced only by batteries
D
Measured easily
11.
The resistance of an ideal ammeter is:
A
Very high
B
Zero
C
Infinite
D
Equal to voltmeter
12.
Which appliance uses maximum power?
A
Electric bulb
B
Electric iron
C
Electric bell
D
Radio
13.
Which quantity remains constant in an ohmic conductor at constant temperature?
A
Current
B
Voltage
C
Resistance
D
Charge
14.
One kilowatt-hour is equal to:
A
1000 joules
B
3600 joules
C
3.6 × 10^6 joules
D
3.6 × 10^3 joules
15.
Electromotive force (EMF) of a source is the energy supplied per unit:
A
Current
B
Charge
C
Resistance
D
Time
16.
The SI unit of electric current is:
A
Volt
B
Ohm
C
Ampere
D
Coulomb
17.
In Ohm’s Law experiment, the graph between V and I is:
A
A straight line
B
A curve
C
A circle
D
A parabola
18.
Which of the following reduces the risk of electric shock?
A
Wet floor
B
Insulated wires
C
Broken plug
D
Overloading
19.
The SI unit of EMF is:
A
Ampere
B
Coulomb
C
Volt
D
Ohm
20.
Household electric supply is usually:
A
DC
B
AC
C
Both AC and DC
D
Neither AC nor DC