NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 742 - 746 of 2142

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Question number: 742

» Experimental Skills » Vernier Callipers

MCQ▾

Question

The center of mass of a triangle shown in figure has coordinates

Triangle with height h and width b

Triangle With Height H and Width B

Here in above figure we shows that center of mass of triangle

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 743

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

MCQ▾

Question

Large transformer, when used for some time, become hot and are cooled by circulating oil. The heating of transformer is due to

(1) Heating effect of current

(2) Hysteresis loss

(3) Chemical effect of current

(4) Magnetic effect of current

Select the correct answers and mark it according to the following

Choices

Choice (4) Response

a.

1,2 and 3 are correct

b.

2 and 4 are correct

c.

1 and 2 are correct

d.

1 and 3 are correct

Question number: 744

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

MCQ▾

Question

An inductive circuit contains resistance of 10Ω and an inductance of 20 H. If an ac voltage of 120 V and frequency 60 Hz is applied to this circuit, the current would be nearly

Choices

Choice (4) Response

a.

0.80 A

b.

0.016 A

c.

0.32 A

d.

0.48 A

Question number: 745

» Laws of Motion » Force and Inertia

MCQ▾

Question

A body of mass 50 kg is pulled by a rope of length 8 m on a surface by a force of 108N applied at the other end. The force that is acting on 50 kg mass, if the linear density of rope is 0.5 kg/m will be –

Choices

Choice (4) Response

a.

108 N

b.

92 N

c.

116 N

d.

100 N

Question number: 746

» Electromagnetic Induction & Alternating Currents » Faraday's Law

MCQ▾

Question

The magnetic flux passing perpendicular to the plane of the coil and directed into the paper is varying according to the relation , where is in milli-weber and t is in second. Then the magnitude of emf induced in the loop when t = 2 second is-

Choices

Choice (4) Response

a.

-6 mV

b.

31 mV

c.

19 mV

d.

-14 mV

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