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Miscellaneous Physics

122 MCQ questions with answers and explanations · page 3 of 5

Test yourself▶ 25 question test▶ 50 question test

Q51. Rectifier is used for-

  1. ATo convert high voltage to low voltage
  2. BTo convert low voltage to high voltage
  3. CTo convert DC to AC
  4. DTo convert AC to DC
Show answer & explanation

Answer: D) To convert AC to DC

Q52. What is the instrument called that measures the intensity of the sun's rays?

  1. AAstrometer
  2. BCrescograph
  3. CActiometer
  4. Dbarometer
Show answer & explanation

Answer: C) Actiometer

Q53. How is the rotation per second of a flying wheel measured?

  1. Abarometer
  2. BAnemometer
  3. CHygrometer
  4. DStrovoscope
Show answer & explanation

Answer: D) Strovoscope

Q54. Radar is used in-

  1. Adetecting objects using light waves
  2. BDetecting objects by reflecting sound waves
  3. CTo locate objects using radio waves
  4. Dchasing rain clouds
Show answer & explanation

Answer: C) To locate objects using radio waves

Q55. Cyclotron is used to accelerate what?

  1. ANeutron
  2. BProton
  3. Cnuclear
  4. Dions
Show answer & explanation

Answer: B) Proton

Q56. What is the Coolidge tube used to produce?

  1. Aradio waves
  2. Bmicrowaves
  3. CX-rays
  4. Dgamma rays
Show answer & explanation

Answer: C) X-rays

Q57. The device used to record and reproduce recorded dictation is called-

  1. AAudiophone
  2. BDictaphone
  3. Cgramophone
  4. Dmicrophone
Show answer & explanation

Answer: B) Dictaphone

Q58. What is a hygrometer used to measure?

  1. Arelative density of matter
  2. Bpurity of milk
  3. Chumidity in the atmosphere
  4. Ddepth of the sea
Show answer & explanation

Answer: C) humidity in the atmosphere

Q59. Cyclotron is a device which-

  1. AProvides energy to charged particles.
  2. BMeasures the speed of vehicles
  3. Ctakes two-dimensional pictures
  4. DMeasures the amount of water vapor.
Show answer & explanation

Answer: A) Provides energy to charged particles.

Q60. The instrument used to measure the intensity of sound is-

  1. AChronometer
  2. BAnemometer
  3. CAudiophone
  4. Daudiometer
Show answer & explanation

Answer: D) audiometer

Q61. What is a 'fathometer' used to measure?

  1. Aearthquake
  2. BRain
  3. Cdepth of the sea
  4. Dsound intensity
Show answer & explanation

Answer: C) depth of the sea

Q62. What is the purpose of a thermostat?

  1. AMeasuring Temperature
  2. Braising the temperature
  3. CKeeping the temperature stable
  4. Dconverting heat into electricity
Show answer & explanation

Answer: C) Keeping the temperature stable

Q63. What is measured by Wheatstone Bridge?

  1. Aelectric current
  2. Bpotential difference
  3. Cresistance
  4. Dpotential
Show answer & explanation

Answer: C) resistance

Q64. Which of the following is used to measure very small time intervals accurately?

  1. APulsar
  2. BQuartz watches
  3. Catomic clocks
  4. Dwhite dwarf
Show answer & explanation

Answer: C) atomic clocks

Q65. Energy transformation in a dynamo takes place in—

  1. Amechanical energy into electrical energy
  2. Bfrom thermal energy to electrical energy
  3. Cfrom potential energy to kinetic energy
  4. Dnone of these
Show answer & explanation

Answer: A) mechanical energy into electrical energy

Q66. Photoelectric cell converts-

  1. Aelectrical energy into light energy
  2. Blight energy into electrical energy
  3. Clight energy into chemical energy
  4. Delectrical energy into mechanical energy
Show answer & explanation

Answer: B) light energy into electrical energy

Q67. Converts chemical energy into electrical energy-

  1. ADynamo
  2. Bheater
  3. CMotor
  4. DBattery
Show answer & explanation

Answer: D) Battery

Q68. Which instrument is used to measure atmospheric pressure?

  1. AHydrometer
  2. Bbarometer
  3. CManometer
  4. DHygrometer
Show answer & explanation

Answer: B) barometer

Q69. Pyrometer is used for-

  1. Ain measuring depth
  2. Bto measure humidity
  3. Cin measuring temperature
  4. Din measuring height
Show answer & explanation

Answer: C) in measuring temperature

Q70. Which instrument is used to measure pressure?

  1. AAneroid Barometer
  2. BAnemometer
  3. CThermometer
  4. DHygrometer
Show answer & explanation

Answer: A) Aneroid Barometer

Q71. Electric current is measured using which of the following instruments?

  1. AAnemometer
  2. BAmmeter
  3. Cvoltmeter
  4. Dwattmeter
Show answer & explanation

Answer: B) Ammeter

Q72. The lie detector is-

  1. Apyrometer
  2. BSeismograph
  3. CPolygraph
  4. Dphonograph
Show answer & explanation

Answer: C) Polygraph

Q73. Which one of the following pairs is not correctly matched?

  1. AOdometer – A device for measuring the distance traveled by the wheels of a vehicle
  2. BOndometer – an instrument for measuring the frequency of electromagnetic waves
  3. CAudiometer – Sound intensity measuring device
  4. DAmmeter - an instrument for measuring electrical power
Show answer & explanation

Answer: D) Ammeter - an instrument for measuring electrical power

Q74. Which of the following pairs is correctly matched?

  1. ASeismograph – records the intensity of earthquake tremors
  2. BPycnometer – measuring solar radiation
  3. CPyrometer – measuring the density of a liquid
  4. DPyrheliometer – measuring high temperatures
Show answer & explanation

Answer: A) Seismograph – records the intensity of earthquake tremors

Q75. What is a flight recorder technically called?

  1. Aaltimeter
  2. BDark Box
  3. Cblind box
  4. Dblack box
Show answer & explanation

Answer: D) black box

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