NEET Physics: Questions 800 - 803 of 2098

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Question number: 800

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

Assertion-Reason▾

Assertion (Ꭺ)

The induced e. m. f. and current will be same in two identical loops of copper and aluminum, when rotated with same speed in the same magnetic field.

Reason (Ꭱ)

Induced e. m. f. is proportional to rate of change of magnetic field while induced current depends on resistance of wire.

Choices

Choice (4) Response

a.

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

b.

Ꭺ is true but Ꭱ is false

c.

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

d.

Ꭺ is false but Ꭱ is true

Question number: 801

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

MCQ▾

Question

A current of 5A is flowing at 220 V in the primary coil of a transformer. If the voltage produced in the secondary coil is 2200V and 50 % of power is lost, then the current in the secondary coil will be -

Choices

Choice (4) Response

a.

0.25A

b.

0.025A

c.

5A

d.

2.5A

Question number: 802

» Laws of Motion » Force and Inertia

MCQ▾

Question

What is the tension in a rod of length L and mass M at a distance y from F, when the rod is acted on by two unequal forces F1 and F2 (

Tension in a rod of length L and mass M

Tension in a Rod of Length L and Mass M

Rod is acted on by two unequal forces F1 and F2

Choices

Choice (4) Response

a.

MLY(F1F2M)

b.

F1(1+YL)+F2(YL)

c.

MLY(F1+F2M)

d.

F1(1YL)+F2(YL)

Question number: 803

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

MCQ▾

Question

An alternating current is given by the equation i=i1cosωt+i2sinωt . The r. m. s. current is given by

Choices

Choice (4) Response

a.

12(i1+i2)

b.

12(i1+i2)2

c.

12(i12+i22)12

d.

12(i12+i22)12

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