Electromagnetic Induction & Alternating Currents (NEET Physics): Questions 33 - 37 of 124

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Question number: 33

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

MCQ▾

Question

An alternating voltage Equation is connected to a 1 µF capacitor through an ac ammeter. The reading of the ammeter will be

Choices

Choice (4) Response

a.

40 mA

b.

10 mA

c.

20 mA

d.

80 mA

Question number: 34

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

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.

56.5V

b.

70.7V

c.

84.8V

d.

101.3V

Question number: 35

» Electromagnetic Induction & Alternating Currents » Electromagnetic Induction

Assertion-Reason▾

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.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

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

d.

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

Question number: 36

» Electromagnetic Induction & Alternating Currents » Faraday's Law

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.

Equation

b.

Equation

c.

Equation

d.

Equation

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: 37 (1 of 3 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

MCQ▾

Question

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

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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