NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 730 - 735 of 2184

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Question number: 730

» Electromagnetic Induction & Alternating Currents » Electromagnetic Induction

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Assertion-Reason▾

Question

Assertion (Ꭺ)

An aircraft flies along the meridian, the potential at the ends of its wings will be the same.

Reason (Ꭱ)

Whenever there is change in the magnetic flux e. m. f. induces.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

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

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is false but Ꭱ is true

Question number: 731

» Electromagnetic Induction & Alternating Currents » Faraday's Law

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MCQ▾

Question

A copper disc of radius 0.1 m rotates about its center with 10 revolution per second in a uniform magnetic field of 0.1 T. The emf induced across the radius of the disc is –

Choices

Choice (4) Response

a.

b.

c.

d.

Passage

Read the passage given below and answer the questions that follows:

In the figure shown, the rod has a resistance R, the horizontal rails have negligible friction. Magnetic field of intensity B is directed perpendicular into the plane of paper. A cell of e. m. f. E and negligible internal resistance is connected between points a and b. The rod is initially at rest.

Rod of resistance R in magnetic field

Rod of Resistance R in Magnetic Field

The rod of resistance R, the horizontal rails has negligible friction. And magnetic field of intensity B is directed perpendicular into the plan of paper.

Question number: 732 (1 of 3 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

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MCQ▾

Question

The velocity of the rod as a function of time t (where ) is

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 733 (2 of 3 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

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MCQ▾

Question

After some time the rod will approach a terminal speed. The speed is,

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 734 (3 of 3 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

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MCQ▾

Question

The current when the rod attains its terminal speed is

Choices

Choice (4) Response

a.

b.

c.

d.

Zero

Question number: 735

» Kinematics » Uniformly Accelerated Motion

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MCQ▾

Question

A force produces acceleration 1, ½, 1/3, ¼… (All in m/s2), applied separetly to n bodies. If these bodies are combined to form single one, then the acceleration of the system will be, if same force is taken into account.

Choices

Choice (4) Response

a.

b.

c.

d.