# NEET Physics: Questions 1294 - 1298 of 2142

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## Question number: 1294

MCQ▾

### Question

Length of a wire is doubled, when 20 × 10 8 N/m 2 stress is applied on it. Its Young’s modulus of elasticity in N/m 2 will be

### Choices

Choice (4) Response

a.

10 × 10 8

b.

20 × 10 10

c.

20 × 10 9

d.

20 × 10 8

## Question number: 1295

» Properties of Solids & Liquids » Heat Transfer » Radiation

Assertion-Reason▾

### Assertion (Ꭺ)

As temperature of a black body is raised, wavelength corresponding to maximum energy reduces.

### Reason (Ꭱ)

Higher temperature would mean higher energy and hence higher wavelength.

### Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

## Question number: 1296

MCQ▾

### Question

The amount of work done in blowing a soap bubble such that its diameter increases from d to D is (T = surface tension of the solution)

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 1297

MCQ▾

### Question

Two soap bubbles of radii r 1 and r 2 equal to 2.5 cm and 3.9 cm are touching each other over a common surface S 1 S 2. Its radius will be

### Choices

Choice (4) Response

a.

6.96 cm

b.

4.45 cm

c.

6.90 cm

d.

4.20 cm

## Question number: 1298

MCQ▾

### Question

A glass flask of volume one liter at 0 0 C is filled, level full of mercury at this temperature. The flask and mercury are now heated to 100 0 C. How much mercury will spill out, if coefficient of volume expansion of mercury is 1.82 × 10 -4 /°C and linear expansion of glass is 0.2 × l0 -4 /ºC?

### Choices

Choice (4) Response

a.

151 cc

b.

212 cc

c.

152 cc

d.

176 cc

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