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Question 1 of 30
1. Question
Assertion: When a battery is short circuited, the terminal voltage is zero.
Reason: In short circuit, the current is zero.CorrectIncorrect -
Question 2 of 30
2. Question
Assertion: In an open circuit, the current passes from one terminal of the electric cell to another.
Reason: Generally, the metal disc of a cell acts as a positive terminal.CorrectIncorrect -
Question 3 of 30
3. Question
Electrical resistivity of any given metallic wire depends upon
CorrectIncorrect -
Question 4 of 30
4. Question
Two devices are connected between two points say A and B in parallel. The physical quantity that will remain the same between the two points is
CorrectIncorrect -
Question 5 of 30
5. Question
100 J of heat is produced each second in a 4Ω resistor. The potential difference across the resistor will be:
CorrectIncorrect -
Question 6 of 30
6. Question
The resistivity of insulators is of the order of
CorrectIncorrect -
Question 7 of 30
7. Question
An electric bulb is connected to a 220V generator. The current is 0.50 A. What is the power of the bulb?
CorrectIncorrect -
Question 8 of 30
8. Question
The electrical resistance of insulators is
CorrectIncorrect -
Question 9 of 30
9. Question
When electric current is passed, electrons move from:
CorrectIncorrect -
Question 10 of 30
10. Question
The heating element of an electric iron is made up of:
CorrectIncorrect -
Question 11 of 30
11. Question
Coulomb is the SI unit of:
CorrectIncorrect -
Question 12 of 30
12. Question
Work done to move 1coulomb charge from one point to another point on a charged conductor having potential 10volt is
CorrectIncorrect -
Question 13 of 30
13. Question
The effective resistance between A and B is
CorrectIncorrect -
Question 14 of 30
14. Question
A student says that the resistance of two wires of same length and same area of cross section is same. This statement is correct if
CorrectIncorrect -
Question 15 of 30
15. Question
A cooler of 1500 W, 200 volt and a fan of 500 W, 200 volt are to be used from a household supply. The rating of fuse to be used is
CorrectIncorrect -
Question 16 of 30
16. Question
If the current I through a resistor is increased by 100% the increased in power dissipation will be (assume temperature remain unchanged)
CorrectIncorrect -
Question 17 of 30
17. Question
A coil in the heater consume power P on passing current. If it is cut into halves and joined in parallel, it will consume power
CorrectIncorrect -
Question 18 of 30
18. Question
If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then
CorrectIncorrect -
Question 19 of 30
19. Question
A metallic conductor has loosely bound electrons called free electrons. The metallic conductor is
CorrectIncorrect -
Question 20 of 30
20. Question
To get 2 Ω resistance using only 6 Ω resistors, the number of them required is
CorrectIncorrect -
Question 21 of 30
21. Question
Resistivity of a metallic wise depends on
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Question 22 of 30
22. Question
Assertion: Conductors allow the current to flow through themselves.
Reason: They have free charge carriers.CorrectIncorrect -
Question 23 of 30
23. Question
Assertion: Bending of wire decrease the resistance of electric wire.
Reason: The resistance of a conductor depends on length, thickness, nature of material and temperature of the conductor.CorrectIncorrect -
Question 24 of 30
24. Question
What is the commercial unit of electrical energy?
CorrectIncorrect -
Question 25 of 30
25. Question
A boy records that 4000 joule of work is required to transfer 10 coulomb of charge between two points of a resistor of 50 Ω. The current passing through it is
CorrectIncorrect -
Question 26 of 30
26. Question
A fuse wire repeatedly gets burnt when used with a good heater. It is advised to use a fuse wire of
CorrectIncorrect -
Question 27 of 30
27. Question
Three resistors of 1 Ω, 2 ft and 3 Ω are connected in parallel. The combined resistance of the three resistors should be
CorrectIncorrect -
Question 28 of 30
28. Question
Which of the following gases are filled in electric bulbs?
CorrectIncorrect -
Question 29 of 30
29. Question
Electric power is inversely proportional to
CorrectIncorrect -
Question 30 of 30
30. Question
An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be:
CorrectIncorrect