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 |
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 |
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 |
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 |