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  1. A black hole is an object whose gravitational field is so strong that even light
  2. Electrons of mass m with de-Broglie wavelength λ fall on the target in an X-ray tube.
  3. A particle is moving with a uniform velocity along a straight line path
  4. MA⁻¹T⁻² is the dimensional formula of
  5. A closely wound solenoid of 2000 turns and area of cross-section 1.5 x 10⁻⁴ m² carries