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- 1. Multiple Choice
According to Ohm's Law, the potential difference across the ends of a resistor is directly proportional to the ……… through it, provided its ............ remains constant.
current, temperature
temperature, current
physical condition, temperature
physical condition, current
- 2. Multiple Choice
If the potential difference across the ends of a conductor is doubled, the current flowing through it, ……….
remain same
is zero
gets half
gets doubled
- 3. Multiple Choice
The SI unit of current is ………
volt
watt
ampere
joule
- 4. Multiple Choice
Coulomb is the SI unit of:
charge
current
potential difference
resistance
- 5. Multiple Choice
Electric potential is a:
sometimes scalar and sometimes vector
neither scalar nor vector
scalar quantity
vector quantity
- 6. Multiple Choice
Which of the following gases are filled in electric bulbs?
Helium and Neon
Argon and Nitrogen
Neon and Argon
Argon and Hydrogen
- 7. Multiple Choice
Three resistors of 1 Ω, 2 Ω and 3 Ω are connected in parallel. The combined resistance of the three resistors should be
greater than 3 Ω
less than 1 Ω
equal to 2 Ω
between 1 Ω and 3 Ω
- 8. Multiple Choice
Electric power is inversely proportional to
voltage
current
temperature
resistance
- 9. Multiple Choice
Electrical resistivity of any given metallic wire depends upon
nature of the material
its thickness
its shape
its length
- 10. Multiple Choice
The heating element of an electric iron is made up of:
copper
nichrome
iron
aluminium
- 11. Multiple Choice
When electric current is passed, electrons move from:
high potential to low potential.
low potential to high potential.
in the direction of the current.
against the direction of the current.
- 12. Multiple Choice
The electrical resistance of insulators is
zero
low
high
infinitely high
- 13. Multiple Choice
What is the commercial unit of electrical energy?
Joules
Kilojoules
Watt-hour
Kilowatt-hour
- 14. Multiple Choice
An electric bulb is connected to a 220V generator. The current is 0.50 A. What is the power of the bulb?
0.0023 W
55 W
110 W
440 W
- 15. Multiple Choice
1 mV is equal to:
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