Discussion
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- Question
Nuclear sizes are expressed in a unit named
Options- A. Fermi
- B. angstrom
- C. newton
- D. tesla
- Correct Answer
- Fermi
ExplanationFermi - A unit of length equal to 10-15 meter (one femtometer), used in nuclear physics. It is similar to the diameter of a proton.
Physics problems
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- 1. It is more difficult to walk on a sandy road than on a concrete road because
Options- A. sand is soft and concreter is hard
- B. the friction between sand and feet is less than that between concrete and feet
- C. the friction between sand and feet is more than that between concrete and feet
- D. the sand is grainy but concrete is smooth Discuss
Correct Answer: the friction between sand and feet is less than that between concrete and feet
- 2. Of the following properties of a wave, the one that is independent of the other is its
Options- A. amplitude
- B. velocity
- C. wavelength
- D. frequency Discuss
Correct Answer: amplitude
- 3. Magnetism at the centre of a bar magnet is
Options- A. minimum
- B. maximum
- C. zero
- D. minimum or maximum Discuss
Correct Answer: zero
- 4. Sound waves in air are
Options- A. transverse
- B. longitudinal
- C. electromagnetic
- D. polarised Discuss
Correct Answer: longitudinal
- 5. The absorption of ink by blotting paper involves
Options- A. viscosity of ink
- B. capillary action phenomenon
- C. diffusion of ink through the blotting
- D. siphon action Discuss
Correct Answer: capillary action phenomenon
- 6. Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open
Options- A. at sea level
- B. at the top of Mt. Everest
- C. at a place in a valley below sea level
- D. in an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level Discuss
Correct Answer: at a place in a valley below sea level
- 7. Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?
Options- A. Scattering
- B. Diffraction
- C. Interference
- D. Polarization Discuss
Correct Answer: Scattering
- 8. Stars which appear single to the naked eye but are double when seen through a telescope are
Options- A. novas and supernovas
- B. binaries
- C. asteroids
- D. quasars Discuss
Correct Answer: binaries
- 9. out of the following, which is not emitted by radioactive substance?
Options- A. Electrons
- B. Electromagnetic radiations
- C. Alpha particles
- D. Neutrons Discuss
Correct Answer: Neutrons
- 10. Identify the vector quantity from the following
Options- A. Heat
- B. Angular momentum
- C. Time
- D. Work Discuss
Correct Answer: Angular momentum
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