# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1578 - 1582 of 2184

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## Question number: 1578

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MCQ▾

### Question

A Carnot engine whose low temperature reservoir is at 17 C has an efficiency of 50%. It is desired to increase the efficiency to 70%. By how. many degrees should the temperature of the high temperature reservoir be increased

### Choices

Choice (4) Response

a.

560 K

b.

380K

c.

840K

d.

280 K

## Question number: 1579

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MCQ▾

### Question

Two mole of ideal monoatomic gas is mixed with two mole of diatomic gas . What is γ for

### Choices

Choice (4) Response

a.

2

b.

c.

d.

## Question number: 1580

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MCQ▾

### Question

If the mass defect in the formation of helium from hydrogen is 0.5%, then the energy obtained, in kWh, in forming helium from 1 kg of hydrogen will be,

### Choices

Choice (4) Response

a.

1.25 ⨯ 10 6

b.

1.25

c.

125 ⨯ 10 4

d.

1.25 ⨯ 10 8

## Question number: 1581

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MCQ▾

### Question

The composition of two simple harmonic motions of equal periods at right angle to each other and with a phase difference of results in the displacement of the particle along,

### Choices

Choice (4) Response

a.

Circle

b.

Figure of 8

c.

Ellipse

d.

Straight line

## Question number: 1582

» Oscillations and Waves » Simple Harmonic Motion » Force, Velocity, and Acceleration

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MCQ▾

### Question

For a particle executing simple harmonic motion, which of the following statements is correct?

(1) The total energy of the particle always remains the same

(2) The restoring force always directed towards a fixed point

(3) The restoring force is maximum at the extreme positions

(4) The acceleration of the particle is maximum at the equilibrium position

Select the correct answers and mark it according to the following codes:

### Choices

Choice (4) Response

a.

1,2 and 3 are correct

b.

1 and 3 are correct

c.

1 and 2 are correct

d.

2 and 4 are correct