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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:
- 16. Multiple Choice
What is the unit of electric charge?
Volt
Ohm
Coulomb
Watt
- 17. Multiple Choice
In a series circuit, the total resistance is:
the sum of individual resistances
the product of individual resistances
equal to the smallest resistance
equal to the largest resistance
- 18. Multiple Choice
Which of the following is a good conductor of electricity?
Wood
Rubber
Silver
Glass
- 19. Multiple Choice
What is the relationship between current, voltage, and resistance in an electrical circuit?
Current is equal to voltage divided by resistance
Voltage is equal to current divided by resistance
Resistance is equal to current divided by voltage
Current is equal to resistance divided by voltage
- 20. Multiple Choice
Which of the following is a unit of electrical power?
Joule
Watt
Volt
Ohm
- 21. Multiple Choice
In a parallel circuit, the total current is:
the sum of individual currents
the product of individual currents
equal to the smallest current
equal to the largest current
- 22. Multiple Choice
What is the unit of electrical resistance?
Ohm
Watt
Volt
Joule
- 23. Multiple Choice
Which of the following materials is commonly used as an insulator?
Copper
Aluminium
Rubber
Silver
- 24. Multiple Choice
What happens to the total resistance in a series circuit when more resistors are added?
It decreases
It increases
It remains the same
It becomes zero
- 25. Multiple Choice
Which of the following describes the flow of electric current?
It flows from positive to negative
It flows from negative to positive
It flows in both directions
It does not flow at all
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