NEET Physics: Questions 1390 - 1394 of 2098

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Question number: 1390

» Atoms and Nuclei » Energy Levels

MCQ▾

Question

In nature there may not be an element for which the principal quantum number 4, then the total possible number of electrons will be,

Choices

Choice (4) Response

a.

32

b.

64

c.

4

d.

60

Question number: 1391

» Thermodynamics » Thermal Equilibrium

Assertion-Reason▾

Assertion (Ꭺ)

In adiabatic compression, the internal energy and temperature of the system get increased.

Reason (Ꭱ)

The adiabatic compression is a slow process.

Choices

Choice (4) Response

a.

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

b.

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

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is true but Ꭱ is false

Question number: 1392

» Properties of Solids & Liquids » Young's Modulus

MCQ▾

Question

A stress of 2 kg/mm 2 is applied on a wire. If the modulus of elasticity of the wire is 10 10 dyne/cm 2, then the percentage increase in the length of the wire will be

Choices

Choice (4) Response

a.

0.0098

b.

0.007

c.

0.0028

d.

0.0196

Question number: 1393

» Properties of Solids & Liquids » Elastic Behavior

Assertion-Reason▾

Assertion (Ꭺ)

The bridges declared unsafe after a long use.

Reason (Ꭱ)

Elastic strength of bridges losses with time.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

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

c.

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

d.

Ꭺ is true but Ꭱ is false

Question number: 1394

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

The temperature of equal masses of three different liquids A, B and C are 12°C, 19 0 C and 28°C respectively. The temperature when A and B are mixed is 16°C and who and C are mixed is 23 0 C. The temperature when A and C are mixed is

Choices

Choice (4) Response

a.

25.2°C

b.

22°C

c.

20.2°C

d.

18.2°C

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