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- Question
One billionth of a second is called
Options- A. microsecond
- B. picoseconds
- C. millisecond
- D. nanosecond
- Correct Answer
- nanosecond
ExplanationA nanosecond (ns) is an SI unit of time equal to one thousand-millionth of a second or one billionth of a second.
- That is, 1/1,000,000,000 of a second, or 10^?9 seconds.
- 1. 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
- 2. Which sources produce alternating current (AC)?
Options- A. Solar power plants
- B. Hydro-electric generators
- C. Batteries
- D. All of the above Discuss
- 3. 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
- 4. After removing two electrons from helium atom it become?
Options- A. UV rays
- B. Alpha particle
- C. Gama particle
- D. X rays Discuss
- 5. 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
- 6. The least penetrating power ray is
Options- A. Gamma rays
- B. Beta rays
- C. Alpha rays
- D. None of the above Discuss
- 7. Graphite is a good conductor of electricity.
Options- A. TRUE
- B. FALSE Discuss
- 8. 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
- 9. A wave with high amplitude have
Options- A. high pitch
- B. low energy
- C. high energy
- D. low pitch Discuss
- 10. An electric fuse is based on
Options- A. the chemical effect of the current
- B. the magnetic effect of the current
- C. the heating effect of the current
- D. All of the above Discuss
Physics problems
Search Results
Correct Answer: after heat treatment
Correct Answer: Hydro-electric generators
Explanation:
Alternating 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...
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: 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
Correct Answer: high energy
Explanation:
The amplitude of a wave is a measure of the displacement of the wave from its rest position i.e, half the distance from its highest point to its lowest point.
Amplitude is proportional to the energy of a wave.
Correct Answer: the heating effect of the current
Explanation:
An electric fuse is based on the heating effect of the current.
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