NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 347 - 350 of 2320

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Question number: 347

» Kinematics » Uniform and Non-Uniform Motion

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MCQ▾

Question

An engine of mass 5 x 10 4 kg pulls a coach of mass 4 x 10 4 kg. Suppose that there is a resistance of 1 N per 100 kg acting on both coach and engine, and that the driving

force of engine is 4500 N. The acceleration of the engine and tension in the coupling will respectively be

Choices

Choice (4)Response

a.

0.04 m/s 2, 2000 N

b.

4 m/s 2, 200 N

c.

0.4 m/s 2, 200 N

d.

0.4 m/s 2, 20 N

Question number: 348

» Electrostatics » Capacitors

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MCQ▾

Question

There is an air filled l pF parallel plate capacitor. When the plate separation is doubled and the space is filled with wax, the capacitance increases to 2pF. The dielectric constant of wax is

Choices

Choice (4)Response

a.

YO

8

b.

6

c.

2

d.

4

Question number: 349

» Laws of Motion » Force and Inertia

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Question

A cricket ball of mass 250 gm moving with a velocity of 25 m/s is hit by a bat so that it acquires a velocity of 30 m/s in the opposite direction. The force acting on the ball, if the contact time is 1/100 of a second, will be -

Choices

Choice (4)Response

a.

632.5 N in the initial direction of ball

b.

130 N in the final direction of ball

c.

1.345 N in the initial direction of ball

d.

1300 N in the final direction of ball

Question number: 350

» Electrostatics » Capacitors

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MCQ▾

Question

In the figure a capacitor is filled with dielectrics K 1, K 2 and K 3. The resultant capacitance is

Capacitor filled with dielectrics

Capacitor Filled with Dielectrics

Choices

Choice (4)Response

a.

b.

c.

d.

None of the above

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