BITSAT (Birla Institute of Technology & Science Admission Test) Physics: Questions 315 - 319 of 382

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Question 315

Question

MCQ▾

A body radiated energy at a temperature of . If the temperature is increased to , then it radiates energy at the rate of –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 316

Question

MCQ▾

The resistance of a long wire is . The wire is stretched to form a uniform wire of length. The resistance now will be –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 317

Question

MCQ▾

A metallic wire bent in form of a semi-circle of radius is moved in a direction parallel to its plane, but perpendicular to a magnetic field with a velocity of . What is the induced emf in wire?

Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

Question 318

Question

MCQ▾

Three rods made of the same material and having the same cross-section have been joined as shown in the figure. Each rod is of the same length. The left and right ends are kept at and respectively. The temperature of the junction of the three rods will be –

Three Rods Joined from One Ends

Choices

Choice (4)Response

a.

b.

c.

d.

Question 319

Question

MCQ▾

A liquid drops at temperature , isolated from its surroundings, breaks into a number of droplets. The temperature of the droplets will be –

Choices

Choice (4)Response

a.

Greater than

b.

Equal to

c.

Less than

d.

All of the above

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