Physics MCQs for NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc. Part 1
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Question:
Which of the following is not an electromagnetic wave.
- X-rays
- Alpha-rays
- Gamma-rays
- Light rays
Question:
Electromagnetic waves of wave length ranging from come under.
- X-rays
- UV region
- Visible region
- Infra-red region
Question:
Electromagnetic theory suggests that the light consists of
- Magnetic vector alone.
- Electric vector alone.
- Electric and magnetic vectors perpendicular to each other.
- Parallel electric and magnetic vector.
Question:
The frequency of radio waves corresponding to a wave length of 10 m is
Question:
The electromagnetic waves travel with velocity of
- Sound
- Light
- Greater than that of light
- Greater than that of sound
Question:
The existence of EM waves were experimentally confirmed by
- Maxwell
- Faraday
- Hertz
- Tesla
Question:
The back emf in a DC motor is maximum when
- The motor has picked up maximum speed.
- The motor has just started moving.
- The speed of motor is still on increase.
- The motor has just been switched off.
Question
AC measuring instrument measures
- Peak value
- Rms value
- Any value
- Average value
Question:
The Q-factor of a resonant circuit is equal to
- 1CWR
- 1WL
- CWR
- fCW