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- Question
Which sources produce alternating current (AC)?
Options- A. Solar power plants
- B. Hydro-electric generators
- C. Batteries
- D. All of the above
- Correct Answer
- Hydro-electric generators
ExplanationAlternating Current (AC) is the current in which flow of current is altered periodically whereas in DC current i.e, direct current the flow of current is only in one direction.
Some of the sources of AC current are :
1. Hydro-electric generators
2. Thermal power generators
3. Nuclear power generators...
- 1. A fixture is defined as a device which
Options- A. is used to check the accuracy of workpiece
- B. holds and locates a workpiece and guides and controls one or more cutting tools
- C. holds and locates a workpiece during an inspection or for a manufacturing operation
- D. All of the above Discuss
- 2. After removing two electrons from helium atom it become?
Options- A. UV rays
- B. Alpha particle
- C. Gama particle
- D. X rays Discuss
- 3. If an object moves with constant velocity,
Options- A. it must have constant speed
- B. it must have constant direction
- C. it must have constant speed in constant direction
- D. None of the above Discuss
- 4. The light of distant stars is affected by
Options- A. Interstellar Dust
- B. The Earth's Atmosphere
- C. Both A & B
- D. None of the above Discuss
- 5. The size of gear is usually specified by
Options- A. pitch circle diameter
- B. diametral pitch
- C. pressure angle
- D. circular pitch Discuss
- 6. Gear Lapping is an operation
Options- A. for gear reconditioning
- B. prior to heat treatment
- C. after heat treatment
- D. None of the above Discuss
- 7. One billionth of a second is called
Options- A. microsecond
- B. picoseconds
- C. millisecond
- D. nanosecond Discuss
- That is, 1/1,000,000,000 of a second, or 10^?9 seconds.
- 8. The least penetrating power ray is
Options- A. Gamma rays
- B. Beta rays
- C. Alpha rays
- D. None of the above Discuss
- 9. Graphite is a good conductor of electricity.
Options- A. TRUE
- B. FALSE Discuss
- 10. Siphon will fail to work if
Options- A. The level of the liquid in the two vessels are at the same height
- B. The temperature of the liquids in the two vessels are the same
- C. The densities of the liquid in the two vessels are equal
- D. Both its limbs are of unequal length Discuss
Physics problems
Search Results
Correct Answer: holds and locates a workpiece and guides and controls one or more cutting tools
Correct Answer: Alpha particle
Correct Answer: it must have constant speed in constant direction
Correct Answer: Both A & B
Correct Answer: pitch circle diameter
Explanation:
The size of gear is usually specified by pitch circle diameter.
Correct Answer: after heat treatment
Correct Answer: nanosecond
Explanation:
A nanosecond (ns) is an SI unit of time equal to one thousand-millionth of a second or one billionth of a second.
Correct Answer: Alpha rays
Explanation:
The least penetrating power ray is Alpha rays.
Correct Answer: TRUE
Explanation:
Graphite is a good conductor of electricity as it contains free electrons to move through the structure of the graphite.
Correct Answer: The level of the liquid in the two vessels are at the same height
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