# NEET Physics: Questions 347 - 350 of 2142

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## Question number: 347

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.

6

b.

YO

8

c.

4

d.

2

## Question number: 348

MCQ▾

### 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.

1300 N in the final direction of ball

c.

1.345 N in the initial direction of ball

d.

130 N in the final direction of ball

## Question number: 349

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

b.

c.

d.

None of the above

## Question number: 350

MCQ▾

### Question

If the earth is a point mass of 6 x l0 24 kg revolving around the sun at a distance of 1.5xl0 8 km and in time T = 3.14 xl0 7 s. Then the angular momentum of the earth around the sun is

### Choices

Choice (4) Response

a.

1.8 x 10 29 kg m 2 /s

b.

2.7 x 10 40 kg m 2 /s

c.

1.5 x 10 37 kg m 2 /s

d.

1.2 x 10 18 kg m 2 /s

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