Class X Science
Subject: Physics
Electricity
Q. 1. 30 electrons are flo wing through a electric wire in a time of 3sec. Then the amount of current flowing through the wire is(A) 1.6 X 10-18A
(B) 9 X 10-18A
(C) 4.8 X 10-19 A
(D) 9 X 10-19 A
Q. 2. A current of 0.5A is drawn by a filament of an electric bulb for 10 minutes. The amount of electric charge flowing through the bulb is
(A) 400C
(B) 500C
(C) 300C
(D) 600C
Q. 3. Current flows through a wire only when there is ___________between the ends of the wire
(A) Potential difference
(B) Potential difference at one end is more than at the other end
(C) Work is done in moving
(D) All of the above
Q. 4. The SI unit of Potential difference is
(A) Volt
(B) JA-1s-1
(C) JC-1
(D) All of the above
Q. 5. The amount of work done in moving a charge of 2C across two points having a potential difference of 24 V is
(A) 50J
(B) 24J
(C) 48J
(D) 54J
Q. 6. The resistance of the wire when the length of the wire increases two times
(A) Becomes 2 times
(B) Becomes 3 times
(C) Becomes 6 times
(D) Becomes 4 times
Q. 7. Resistance of the wire is given by
(A) R= V/I
(B) R= IV
(C) R= I/V
(D) R= I2V
Q. 8. The resultant resistance when three resistances 2ohms, 4ohms, 5ohms , when connected in series is
(A) 12 ohms
(B) 13 ohms
(C) 11 ohms
(D) 15 ohms
Q. 9. Electric fuse is connected with:
(A) Live wire
(B) Neutral wire
(C) Earthing
(D) Parallel to the line wire
Q. 10. In a voltmeter there are 20 divisions between 0 to 0.5 the least count of voltmeter is
(A) 0.0020
(B) 0.025
(C) 0.050
(D) 0.250
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