NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 500 - 504 of 2320

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Question number: 500

» Current Electricity » Potentiometer

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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.

810 Ω

b.

790 Ω

c.

1000 Ω

d.

990 Ω

Question number: 501

» Current Electricity » Wheatstone Bridge

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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

Choices

Choice (4)Response

a.

12 Ω

b.

6 Ω

c.

15 Ω

d.

9 Ω

Question number: 502

» Current Electricity » Potential Difference and EMF of Cell

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MCQ▾

Question

In the figure,

Circuit diagram with battery and resistor

Circuit Diagram with Battery and Resistor

  1. Current may flow from X to Y
  2. Current may flow from Y to X
  3. Direction of current depends on E
  4. Direction of current depends on r

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

Choices

Choice (4)Response

a.

1 and 2

b.

1,2 and 3

c.

2 and 4

d.

1 and 3

Passage

A 6V battery of negligible internal resistance is connected across a uniform wire AB of length 100cm. The positive terminal of another battery of emf 4V and internal resistance 1Q is joined to the point A as shown in figure. Take the potential at D to be zero.

Circuit diagram consist of uniform wire AB, two batteries.

Circuit Diagram Consist of Uniform Wire AB, Two Batteries

Question number: 503 (1 of 2 Based on Passage) Show Passage

» Current Electricity » Potentiometer

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MCQ▾

Question

What is the potential at points A and C?

Choices

Choice (4)Response

a.

6V, 2V

b.

8V, 3V

c.

6V, 4V

d.

8V, 4V

Question number: 504 (2 of 2 Based on Passage) Show Passage

» Current Electricity » Potentiometer

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MCQ▾

Question

If the points C and D are connected by a wire, what will be the current through it?

Choices

Choice (4)Response

a.

3A

b.

1A

c.

2A

d.

Zero

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