Properties of Solids & Liquids (NEET Physics): Questions 179 - 182 of 188

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Question number: 179

» Properties of Solids & Liquids » Heat Transfer » Conduction

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. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
b. Ꭺ is true but Ꭱ is false
c. Both Ꭺ and Ꭱ are false
d. Ꭺ is false but Ꭱ is true

Question number: 180

» Properties of Solids & Liquids » Elastic Behavior

MCQ▾

Question

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.

2 × l0 6 Pa

b.

2 × 10 -4 Pa

c.

2 × l0 4 Pa

d.

2 × l0 9 Pa

Question number: 181

» Properties of Solids & Liquids » Specific Heat Capacity

MCQ▾

Question

A student takes 50 gm wax (specific heat = 0.6 kcal/kg °C) and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are respectively.

Temperature vs time graph - 50gm wax

Temperature vs Time Graph - 50gm Wax

In above figure we can show that effect of temperature on wax

Choices

Choice (4) Response
a.

500 cal, 50°C

b.

1000 cal, 100°C

c.

1500 cal, 200°C

d.

1000 cal, 200°C

Question number: 182

» Properties of Solids & Liquids » Terminal Velocity

MCQ▾

Question

A large open tank has two holes in the wall. One is a square hole of side L at a depth y from the top and the other is a circular hole of radius if at a depth 4y from the top. When the tank is completely filled with water the quantities of water flowing out per second from both the holes are the same. Then R is equal to

Choices

Choice (4) Response
a.

2πL

b.

L

c.

L2π

d.

L2π

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