Current Electricity (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 43 - 46 of 77

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Question number: 43

» Current Electricity » Potentiometer

MCQ▾

Question

A potentiometer has uniform potential gradient across it. Two cells connected in series (i) to support each other and (ii) to oppose each other are balanced over 6m and 2m respectively on the potentiometer wire. The emf of the cells are in the ratio of

Choices

Choice (4) Response

a.

3: 1

b.

1: 2

c.

2: 1

d.

1: 1

Question number: 44

» Current Electricity » Electrical Resistance

MCQ▾

Question

In the fig below the bulbs are identical, The bulbs, light most brightly are

Circuit diagram with A, B, C, D and F bulbs.

Circuit Diagram With a, B, C, D and F Bulbs.

five bulb connected with battery (E) in figure.

Select the correct answers and mark it according to the following codes:

1. A

2. B

3. F

4. D

5. C

Choices

Choice (4) Response

a.

1 and 2 are correct

b.

1, 2 and 3 are correct

c.

2 and 4 are correct

d.

1 and 3 are correct

Question number: 45

» Current Electricity » Potentiometer

MCQ▾

Question

The resistance of a 10 meter long potentiometer wire is 1 ohm/meter. A cell of emf 2.2 volts and a high resistance box are connected in series with this wire. The value of resistance taken from resistance box for getting potential gradient of 2.2 millivolt/meter will be

Choices

Choice (4) Response

a.

790 Ω

b.

990 Ω

c.

810 Ω

d.

1000 Ω

Question number: 46

» Current Electricity » Wheatstone Bridge

MCQ▾

Question

Five resistors are connected as shown in the diagram. The equivalent resistance between A and B is

Bridge circuit diagram

Bridge Circuit Diagram

A and B five resistors make a balance bridge circuit. Because of balance bridge there will be no current passing through CD arm.

Choices

Choice (4) Response

a.

12 Ω

b.

9 Ω

c.

6 Ω

d.

15 Ω

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