# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1444 - 1447 of 2184

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## Question number: 1444

» Properties of Solids & Liquids » Heat Transfer » Convection

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MCQ▾

### Question

A cylindrical rod with one end in a steam chamber and its other end in ice results in melting of 0.1 gm of ice per second. If the rod is replaced by another with half the length and double the radius of the first and if the thermal conductivity of material of second rod is ¼ that of firth, the rate at which ice melts in gm/sec will be

### Choices

Choice (4) Response

a.

1.6

b.

3.2

c.

0.1

d.

0.2

## Question number: 1445

» Thermodynamics » Laws of Thermodynamics » Zeroth Law of Thermodynamics

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MCQ▾

### Question

One mole of an ideal gas expands at a constant temperature of 200 K from an initial volume of 10 litres to a final volume of 20 litres. The work done in expanding the gas is

(R = 8.31 J/mole-K)

### Choices

Choice (4) Response

a.

1500 Joules

b.

1728 Joules

c.

3456 Joules

d.

750 Joules

## Question number: 1446

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MCQ▾

### Question

A spring is stretched by 3 cm when a load of 5.4 × 10 6 dyne is suspended from it. Work done will be

### Choices

Choice (4) Response

a.

8.0 × 10 6 erg

b.

8 × 10 6 J

c.

8.1 × 10 6 J

d.

8.1 × 10 6 erg

## Question number: 1447

» Properties of Solids & Liquids » Heat Transfer » Conduction

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Assertion-Reason▾

### Assertion (Ꭺ)

The equivalent thermal conductivity of two plates of same thickness in contact (series) is less than the smaller value of thermal conductivity.

### Reason (Ꭱ)

For two plates of equal thickness in contact (series) the equivalent thermal conductivity is given by

### Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

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