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- Question
If velocity is constant then acceleration is what?
Options- A. constant
- B. increasing
- C. 0
- D. infinite
- Correct Answer
- 0
ExplanationIf an object moves with some velocity that means the magnitude and direction of the object changes i.e, the object moves with some acceleration. Hence, if the object moves with constant velocity, no change in direction and magnitude of speed i.e, no acceleration = 0 acceleration.
- 1. 1 WH =
Options- A. 360 joules
- B. 36000 joules
- C. 3600 joules
- D. 36 joules Discuss
- 2. Which among the following temperature scale is based upon absolute zero?
Options- A. Rankine
- B. Celsius
- C. Fahrenheit
- D. Kelvin Discuss
- 3. What type of electromagnetic radiation is used in the remote control of a television?
Options- A. Ultraviolet
- B. Visible
- C. Infrared
- D. None of the above Discuss
- 4. The taper on the lathe spindle is
Options- A. 1 in 10
- B. 1 in 20
- C. 1 in 15
- D. 1 in 25 Discuss
- 5. Pitot tube is used to measure
Options- A. static pressure
- B. velocity at stagnation point
- C. stagnation pressure
- D. dynamic pressure Discuss
- 6. Speed regulation of synchronous motor is
Options- A. 1%
- B. 25%
- C. Zero
- D. 0.5% Discuss
- 7. A manometer is used to measure
Options- A. earthquake
- B. pressure
- C. temperature
- D. density Discuss
- 8. Circuit breaker usually operate under
Options- A. after D. C. component has ceased
- B. transient state of short-circuit current
- C. sub-transient state of short-circuit current
- D. steady state of short-circuit current Discuss
- 9. The unit of energy in MKS system is
Options- A. Joule
- B. Ohm
- C. Erg
- D. Volt Discuss
- 10. The energy that generates wind comes from what source?
Options- A. Anemometers
- B. Solar radiation
- C. Ocean currents
- D. None of the above Discuss
Physics problems
Search Results
Correct Answer: 3600 joules
Explanation:
The watt-hour (WH) is a unit of energy equivalent to one watt (1 W) of power expended for one hour (1 h) of time.
1 WH = 3600 joules.
Correct Answer: Kelvin
Explanation:
Kelvin temperature scale is the temperature scale that is based upon absolute zero.
Correct Answer: Infrared
Correct Answer: 1 in 20
Correct Answer: stagnation pressure
Correct Answer: Zero
Correct Answer: pressure
Correct Answer: transient state of short-circuit current
Correct Answer: Joule
Explanation:
The unit of energy in MKS system is Joule.
Correct Answer: Solar radiation
Explanation:
Wind is nothing but the form of moving air. It is caused by the uneven heating of the earth's surface by the sun. Hence, the energy that generates wind comes from solar radiation.
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