# GATE (Graduate Aptitude Test in Engineering) Physics: Questions 481 - 486 of 659

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### Passage

The following circuit contains three operational amplifiers and resistors.

## Question 481 (1 of 2 Based on Passage)

Appeared in Year: 2008

### Question

MCQ▾

The output voltage at the end of second operational amplifier is –

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 482 (2 of 2 Based on Passage)

Appeared in Year: 2008

### Question

MCQ▾

The output (at the end of third op amp) of the above circuit is –

### Choices

Choice (4)Response

a.

b.

c.

Zero

d.

## Question 483

Appeared in Year: 2008

### Question

MCQ▾

A rigid body is rotating about its centre of mass, fixed at the origin, with an angular velocity and angular acceleration . If the torque acting on it is and its angular momentum is , the rate of change of its kinetic energy is –

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 484

Appeared in Year: 2007

### Question

MCQ▾

The free energy for a photon gas is given by , where is a constant. The entropy and the pressure of the photon gas are –

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 485

Appeared in Year: 2007

### Question

MCQ▾

In the circuit shown, the voltage at test point is and the voltage between gate and source is . The value of is –

### Choices

Choice (4)Response

a.

70

b.

56

c.

48

d.

42

## Question 486

Covariant and Contravariant Tensor

Appeared in Year: 2008

### Question

MCQ▾

Under a certain rotation of coordinate axes, a rank – 1 tensor transforms according to the orthogonal transformation defined by the relations . Under the same rotation a rank – 2 tensor would transform such that –

### Choices

Choice (4)Response

a.

b.

c.

d.

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