NEET Physics: Questions 741 - 744 of 2098

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Question number: 741

» Experimental Skills » Vernier Callipers

MCQ▾

Question

A 2 kg body and a 3 kg body are moving along the x-axis. At a particular instant the 2 kg body has a velocity of 3 ms -1 and the 3 kg body has the velocity of 2ms -1. The velocity of the center of mass at that instant is

Choices

Choice (4) Response

a.

0

b.

1 ms -1

c.

5 ms -1

d.

None of the above

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.

x=h3,y=b3

b.

x=h4,y=b2

c.

x=h2,y=b4

d.

x=h2,y=b2

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

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