NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 728 - 731 of 2320

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Question number: 728

» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC

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MCQ▾

Question

The frequency of an alternating voltage is 50 cycles/sec and its amplitude is 120 V. Then the r. m. s value of voltage is

Choices

Choice (4)Response

a.

84.8V

b.

101.3V

c.

56.5V

d.

70.7V

Question number: 729

» Experimental Skills » Screw Gauge

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MCQ▾

Question

Four particles of masses m, 2m, 3m and 4m are arranged at the corners of a parallelogram with each side equal to a and one of the angle between two adjacent sides is 60°. The parallelogram lies in the x-y plane with mass-m at the origin and 4m on the x-axis. The center of mass of the arrangement will be located at

Choices

Choice (4)Response

a.

b.

c.

d.

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.

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