NCERT Science Class 10 Chapter 16 Electricity CBSE Board Sample Problems Multiple Choice Question

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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 Q. The current passing through it is

1. 2A

2. 4A

3. 8A

4. 16A

Question

A battery of 10 volt carriers 20,000 C of charge through a resistance of 20 . The work done In 10 seconds is

Question

The resistance of an electric bulb drawing 1.2 A current at 6 V will be

1. 0.5 ohm

2. 5 ohm

3. 0.2 ohm

4. 2 ohm

Question

The equivalent resistance of a series combination of two resistances is X ohm. If the resistance are of 10 ohm and 40 ohm respectively, the value of X will be

1. 10 ohm

2. 20 ohm

3. 50 ohm

4. 40 ohm

Question

All elements of an electric circuit are connected in series except

1. Voltmeter

2. Ammeter

3. Rheostat

4. Resistor

Question

The resistance of an alloy

1. Increases with increase temperature

2. Decreases with temperature

3. Is constant with rise in temperature

4. Is zero

Question

A resistance wire is stretched so as to double its length. Its new resistivity will have a magnitude

1. 2 times its original value

2. 4 times its original value

3. 8 times its original value

4. Same as its original

Question

SI unit of resistivity is

1. Ohm/metre

2. Ohm-metre

3. Ohm / (metre) 3

4. Ohm / (metre) 2

Question

Electrical resistivity of a given metallic wire depends upon

(a) Its length

(b) Its shape

(d) Nature of the material

(C) Its thickness

Question

In each of the following questions, a statement of Assertion is given by the corresponding of Reason. Of the statements, marks the correct answer as

Assertion: When two ends of a metallic wire are connected across the terminals of a cell, then some potential difference is set up between its ends. The direction of electrons are from positive terminal its lower to negative terminal of the cell.

Reason: Electrons are flowing through the conductors from its higher potential to Potential end.

1. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

2. If both Assertion and Reason are true and Reason is not the correct explanation of Assertion.

3. If Assertion is true, but Reason is false.

4. If Assertion is false, but Reason is true.