Page Number- 5

(1) The phenomenon of increase in amplitude when the driving force is close to the natural frequency of the ascillator is called??

  • A. Resonance
  • B. Frequency
  • C. Simple hormonic
  • D. All of the above
0
(a) Resonance

(2) Dimension formula of frequency.?

  • A. [T‐¹]
  • B. [T]
  • C. [T‐²]
  • D. [T‐³]
0
(a) [T‐¹]

(3) Example of non-periodic motion??

  • A. Orbital motion of planet
  • B. Projectile motion
  • C. Both a and b
  • D. Oscillatory motion
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(b) Projectile motion

(4) Ultrasonic waves in air produced by a vibrating quartz crystal??

  • A. Transverse wave
  • B. Longitudinal wave
  • C. Transverse and longitudinal both
  • D. None of the above
0
(b) Longitudinal wave

(5) The square of the time period of revolution of a planet is a proportional to the cube of semi-major axis of the ellipse traced out by the planet??

  • A. Law of periods
  • B. Law of area
  • C. Law of orbits
  • D. None of these
0
(a) Law of periods

(6) The escape speed from the surface of earth is depend on??

  • A. The height of the location from where the body is launched
  • B. Mass of the body
  • C. Weight of the body
  • D. Direction of the body
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(a) The height of the location from where the body is launched

(7) The radius of first orbit (n=1) be minimum??

  • A. Double ionized Lithium
  • B. Single ionized Helium
  • C. Hydrogen
  • D. None of the above
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(a) Double ionized Lithium

(8) Paschen series of spectral line is nearly??

  • A. 750nm
  • B. 800nm
  • C. 820nm
  • D. 500nm
0
(c) 820nm

(9) At the time of short circuit , the current in the circuit is ??

  • A. Reduce substantially
  • B. Does not change
  • C. Increase heavily
  • D. Very continuously
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(c) Increase heavily

(10) Which safety device we used to protecting the circuit due to short circuating or overloading of circuits??

  • A. Insulator
  • B. Thin wire
  • C. Fuse
  • D. All of the above
0
(c) Fuse
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