Current Electricity-Resistances of Different Materials (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 1 - 5 of 6

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Question number: 1

» Current Electricity » Resistances of Different Materials

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MCQ▾

Question

Two wires of same material have length L and 2L and cross-sectional areas 4A and A respectively. The ratio of their specific resistance would be

Choices

Choice (4)Response

a.

1: 8

b.

1: 1

c.

1: 2

d.

8: 1

Question number: 2

» Current Electricity » Resistances of Different Materials

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MCQ▾

Question

The reading of voltmeter in the following circuit will be-

Circuit Diagram of 20Ω and 80Ω resistors, voltmeter and battery

Circuit Diagram of 20Ω and 80Ω Resistors, Voltmeter and Battery

Choices

Choice (4)Response

a.

2 volt

b.

1.33 volt

c.

1.60 volt

d.

0.80 volt

Question number: 3

» Current Electricity » Resistances of Different Materials

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MCQ▾

Question

A voltmeter can measure up to 25 volt and its resistance is 1000 Ω . The resistance required to add with voltmeter to measure up to 250 volt will be

Choices

Choice (4)Response

a.

900 Ω

b.

9000 Ω

c.

2500 Ω

d.

1000 Ω

Question number: 4

» Current Electricity » Resistances of Different Materials

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MCQ▾

Question

The shunt required for 10 % of main current to be sent through the moving coil galvanometer of resistance 99 Ω will be

Choices

Choice (4)Response

a.

11 Ω

b.

9.9 Ω

c.

90 Ω

d.

0.9 Ω

Question number: 5

» Current Electricity » Resistances of Different Materials

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MCQ▾

Question

A heater coil connected to a supply of a 220 F is dissipating some power P 1 . The coil is cut into half and the two halves are connected in parallel. The heater now dissipates a power P 2. The ratio of power P 1 : P 2 is

Choices

Choice (4)Response

a.

4: 1

b.

1: 2

c.

2: 1

d.

1: 4

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