Properties of Solids & Liquids [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 173 - 176 of 453

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Question 173

Question MCQ▾

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 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

Edit

Question 174

Question MCQ▾

A spring is stretched by 3 cm when a load of 5.4 × 106 dyne is suspended from it. Work done will be

Choices

Choice (4)Response

a.

8.0 × 106 erg

b.

8 × 106 J

c.

8.1 × 106 J

d.

8.1 × 106 erg

Edit

Question 175

Question 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

Edit

Question 176

Question MCQ▾

The volume of a solid rubber ball when it is carried from the surface to the bottom of a 200 m deep lake decreases by 0.1% . The value for bulk modulus of elasticity for rubber will be

Choices

Choice (4)Response

a.

Pa

b.

Pa

c.

Pa

d.

Pa

Edit