Physics [NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension]: Questions 87 - 91 of 136
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Question 87
Question MCQ▾
Eight identical spherical mercury drops charged to a potential of 20 V each are coalesced into a single spherical drop
Choices
Choice (4) | Response | |
---|---|---|
a. | The internal energy of the system remains the same | |
b. | Internal energy of the system decreases | |
c. | The new potential of the drop is 80 V | |
d. | The potential remains the same i.e.. , 20 V |
Question 88
Question MCQ▾
Two masses of 1 g and 4 g are moving with equal kinetic energies. The ratio of the magnitudes of their linear moments is
Choices
Choice (4) | Response | |
---|---|---|
a. | 4: 1 | |
b. | 1: 6 | |
c. | 1: 2 | |
d. | √ 2: 1 |
Question 90
Question MCQ▾
Why the dam of water reservoir is thick at the bottom?
Choices
Choice (4) | Response | |
---|---|---|
a. | Density of water increases with depth | |
b. | Pressure of water increase with depth | |
c. | Temperature of water increase with depth | |
d. | Quantity of water increases with depth |
Question 91
Question MCQ▾
Two pieces of metal when immersed in a liquid have equal upthrust on them, then
Choices
Choice (4) | Response | |
---|---|---|
a. | Two pieces of metal are floating to the same depth | |
b. | Two Pieces must have equal weights | |
c. | Two Pieces must have equal volumes | |
d. | Two Pieces must have equal densities |