Physics Questions Practice Question and Answer
8 Q: When water is heated from 0°C to 4°C, its volume:
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5ee0cf998c4c964f73d9946e- 1first increases then decreasesfalse
- 2remains the samefalse
- 3increasesfalse
- 4decreasestrue
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Answer : 4. "decreases"
Q: Mechanical Energy is:
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5f86a4cdb7ad805e26c17e96- 1The energy release during mechanical work.false
- 2The sum of kinetic energy and the potential energy of an object.true
- 3Equal to the rate of doing work.false
- 4The Energy absorbed during movement of a body.false
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Answer : 2. "The sum of kinetic energy and the potential energy of an object. "
Q: Which scientist suggested that the magnet must exert an equal and opposite force on the current-carrying conductor?
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64c24b4aa919c8488e0dbe6a- 1Michael Faradayfalse
- 2Andre Marie Amperetrue
- 3Joseph Henryfalse
- 4William Gilbertfalse
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Answer : 2. "Andre Marie Ampere "
Explanation :
1. French scientist Andre-Marie Ampère suggested that a magnet should also exert an equal and opposite force on a current-carrying conductor.
2. A current-carrying wire has its own magnetic field.
3. A current-carrying wire attracts a magnetic material like a normal bar magnet.
4. When the current is withdrawn or the switch is closed, there is no magnetic effect in that case.
5. This phenomenon was called the magnetic effect of current.
Q: Farad is unit of ___________.
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62de747c8c996774cb934336- 1Capacitancetrue
- 2Reactancefalse
- 3Electric chargefalse
- 4Electric conductancefalse
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Answer : 1. "Capacitance"
Q: Atomic bomb theory is based on-
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5fa55f0566bdb73670f4420c- 1on nuclear fusionfalse
- 2On nuclear fissiontrue
- 3Both of the abovefalse
- 4None of the abovefalse
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Answer : 2. "On nuclear fission"
Q: The product of force and displacement is called—
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5f86a302b7ad805e26c163d8- 1Accelerationfalse
- 2Worktrue
- 3Momentumfalse
- 4Weightfalse
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Answer : 2. "Work"
Q: The best conductor of heat is?
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6137464a2421ea1e0c7df9fb- 1Silvertrue
- 2goldfalse
- 3copperfalse
- 4Aluminumfalse
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Answer : 1. "Silver"
Q: Principle of fuse is –
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5f1550ae4cff381d16263083- 1Heating effect of electricitytrue
- 2Magnetic effect of electricityfalse
- 3Chemical effect of electricityfalse
- 4Mechanical effect of electricityfalse
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