# Physics [NSTSE (National Science Talent Search Exam- Unified Council) Class 7]: Questions 84 - 91 of 191

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## Question number: 84

Physics
Edit

### Question

MCQ▾

Joule is a unit of:

### Choices

Choice (4)Response

a.

S I unit of force

b.

C G S unit of force

c.

S I unit of heat

d.

C G S unit of heat

## Question number: 85

Edit

### Question

MCQ▾

The unit of velocity is same as:

### Choices

Choice (4)Response

a.

Time

b.

Speed

c.

Distance

d.

Acceleration

## Question number: 86

Edit

### Question

MCQ▾

cm/s is a C. G. S unit of what?

### Choices

Choice (4)Response

a.

Time

b.

Displacement

c.

Distance

d.

Speed

## Question number: 87

Physics
Edit

### Question

MCQ▾

Why pendulum of a clock is made of invar steel?

### Choices

Choice (4)Response

a.

It has high coefficient of thermal expansion

b.

It has low coefficient of thermal expansion

c.

Invar steel is very cheap and found easily.

d.

Question does not provide sufficient data or is vague

## Question number: 88

Physics
Edit

MCQ▾

What is energy?

### Choices

Choice (4)Response

a.

Change of position with respect to time.

b.

How powerful you are.

c.

The capacity to do work.

d.

None of the above

## Passage

Answer the following questions based on the following graph.

## Question number: 89 (1 of 2 Based on Passage) Show Passage

Edit

### Question

MCQ▾

From the above graph which part is shown as constant speed?

### Choices

Choice (4)Response

a.

OA

b.

BC

c.

AB

d.

None of the above

## Question number: 90 (2 of 2 Based on Passage) Show Passage

Edit

### Question

MCQ▾

From the above graph where deceleration can be seen?

### Choices

Choice (4)Response

a.

AB

b.

OA

c.

BC

d.

None of the above

## Question number: 91

Physics
Edit

### Question

MCQ▾

Microwave is a modern equipment for cooking food now a days. Which technique is used in microwave to cook food?

### Choices

Choice (4)Response

a.

Conduction

b.

Insulation

c.