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1009 available questions

Physics · Question 531

One rpm is equal to ____________0.10472 rad/sec.

  1. 2
  2. 1.5
  3. 2.25
  4. 0.105
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Correct answer: D

0.105

Physics · Question 532

The basic purpose of filter is to

  1. Minimize variation in ac signal
  2. Suppress harmonics in rectifed output
  3. Remove ripples form the rectified output
  4. Stabilize dc output voltage
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Correct answer: C

Remove ripples form the rectified output

Physics · Question 533

One rpm is equal to ____________0.10472 rad/sec.

  1. 2
  2. 1.5
  3. 2.25
  4. 0.105
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Correct answer: D

0.105

Physics · Question 534

If two bodies have same temperature the rate of heat transfer between them is:

  1. infinite
  2. zero
  3. double the temperature
  4. none of these
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Correct answer: B

zero

Physics · Question 535

A full wave redtifier is operating from 50 HZ mains. Fundamental frequency of ripple will be

  1. 100 HZ
  2. 25 HZ
  3. 50 HZ
  4. 200 HZ
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Correct answer: A

100 HZ

Physics · Question 536

Motional emf induced in a coil is dpendent of

  1. Magnetic field
  2. Orientation
  3. Length
  4. All of these
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Correct answer: D

All of these

Physics · Question 537

If the wavelength of a wave is 20cm and its time period is T. What is the disance travelled by a crest on the wave in 1.25T?

  1. 30 cm
  2. 25 cm
  3. 15 cm
  4. 40 cm
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Correct answer: B

25 cm

Physics · Question 538

The longest wavelength observed in balmer series is

  1. 36R/5
  2. 36R/7
  3. 36R/11
  4. 36R/13
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Correct answer: A

36R/5

Physics · Question 539

The black body which is close to perfect body is:

  1. Translucent glass box
  2. Cavity Radiator
  3. Black holes
  4. All of these
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Correct answer: B

Cavity Radiator

Physics · Question 540

A glass block is immersed is a tank which is filled with a liquid of higher refractive index. Light is incident from the liquid on one side of glass block at an angel greater than critical angle. Which of the following statements are true?

  1. light is partially transmitted into the glass block bending towards the normal and partillay reflected
  2. light is partially transmitted into the glass block bending away from the normal and partially reflected
  3. light is completely transmitted into the glass and did not reflect in to liquid
  4. light is completely reflected back into the liquid
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Correct answer: D

light is completely reflected back into the liquid