NEET Physics: Questions 1471 - 1475 of 2098

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Question number: 1471

» Thermodynamics » Concept of Temperature

MCQ▾

Question

A Carnot engine whose low temperature reservoir is at 7 C has an efficiency of 50%. It is desired to increase the efficiency to 70%. By how many degrees should the temperature of the high temperature reservoir be increased?

Choices

Choice (4) Response

a.

380K

b.

280 K

c.

840K

d.

560 K

Question number: 1472

» Thermodynamics » Laws of Thermodynamics » First Law of Thermodynamics

MCQ▾

Question

A system is given 200 calories of heat and it does 600 joules of work. The internal energy of the system change in this process is (J = 4.18 Joule/cal)

Choices

Choice (4) Response

a.

- 236 Joule

b.

236.5 Joule

c.

-300 Joule

d.

236 Joule

Question number: 1473

» Atoms and Nuclei » Nuclear Fission and Fusion

MCQ▾

Question

Which of the following are not examples of nuclear fusion?

(1) Formation of Ba and Kr from U 235

(2) Formation of Pu 235 from Th 235

(3) Formation of water from hydrogen and oxygen

(4) Formation of He from H

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1 and 2 are correct

b.

1 and 3 are correct

c.

1, 2 and 3 are correct

d.

2 and 4 are correct

Question number: 1474

» Atoms and Nuclei » Composition and Size of Nucleus

MCQ▾

Question

How many electrons, protons and neutrons are there in a 6 gm of 6 C 12?

Choices

Choice (4) Response

a.

36 × 1023, 36 × 1023, 36 × 1023

b.

18 × 1023, 18 × 1023, 18 × 1023

c.

6 × 1023, 6 × 1023, 6 × 1023

d.

12 × 1023, 12 × 1023, 12 × 1023

Question number: 1475

» Atoms and Nuclei » Binding Energy Per Nucleon

MCQ▾

Question

If the binding energy of deuterium is 2.23 MeV, then the mass defect will be- (in a. m. u. )

Choices

Choice (4) Response

a.

- 0.0012

b.

0.0024

c.

-0.0024

d.

0.0012

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