NEET Physics: Questions 496 - 499 of 2098

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Question number: 496

» Current Electricity » Electric Cell and Its Internal Resistance

Assertion-Reason▾

Assertion (Ꭺ)

voltammeter measures current more accurately than ammeter.

Reason (Ꭱ)

Relative error will be small if measured from voltammeter.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are false

Question number: 497

» 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: 498

» 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: 499

» 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

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