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- Question
What is the process of conversion of solid state directly to gaseous state called?
Options- A. Evaporation
- B. Condensation
- C. Sublimation
- D. Distillation
- Correct Answer
- Sublimation
- 1. On which principle does the hydraulic lift works?
Options- A. Newton's law
- B. Pascal's law
- C. Archimedes's law
- D. Joule's law Discuss
- 2. Which phenomena shows the particle nature of light?
Options- A. Diffraction
- B. Interference
- C. Photoelectric effect
- D. Polarisation Discuss
- 3. Which one of the following statements with regard to Jet stream, an upper level tropospheric wave, is not correct?
Options- A. It is narrow band of high-velocity wind.
- B. It follows the wave path near the tropopause at elevations of 8 km to 15 km.
- C. Jet streams are typically continuous over long distances.
- D. In summer, the polar front jet achieves its maximum force. Discuss
- 4. A photon of X-ray has energy of 1 keV. A photon of visible radiation has energy of 3 eV. In this context, which one of the following statements is not correct?
Options- A. The wavelength of X-ray photon is less than the wavelength of visible radiation photon.
- B. Both the photons have different energies.
- C. The speeds of both the photons in vacuum are different
- D. The frequency of X-ray photon is higher than the frequency of visible radiation photon. Discuss
- 5. A parallel-plate capacitor of capacitance C1is made using two gold plates. Another parallel-plate capacitor of capacitance C2is made using two aluminium plates with same plate separation, and all the four plates are of same area. If g?and aPare respectively the electrical resistivities of gold and aluminium, then which one of the following relations is correct?
Options- A. C1>C2
- B. C2>C1
- C. C1pa = C2pg
- D. C1 = C2 Discuss
- 6. Supercooling is cooling of liquid _____.
Options- A. below melting point
- B. below freezing point
- C. at melting point
- D. above melting point Discuss
- 7. The angle between the __________and the incident ray is called the angle of incidence.
Options- A. surface
- B. normal
- C. tangent
- D. reflected ray Discuss
- 8. The laws which govern the motion of planets are called ___________________.
Options- A. Newton's Laws
- B. Kepler's Laws
- C. Avogadro's laws
- D. De Morgan's Laws Discuss
- 9. Find the current (in A) when a charge of 500 Coulomb flows in 25 seconds.
Options- A. 12500
- B. 20
- C. 40
- D. 6250 Discuss
- 10. In _____________ motion of a body its velocity varies with time.
Options- A. uniform
- B. linear
- C. equilibrium
- D. non-uniform Discuss
Physics problems
Search Results
Correct Answer: Pascal's law
Correct Answer: Photoelectric effect
Correct Answer: It follows the wave path near the tropopause at elevations of 8 km to 15 km.
Explanation:
All are correct except D, as Jet streams are phenomena of winter. It is believed that jet stream exercises an important influence on the winter weather in India.
Correct Answer: The speeds of both the photons in vacuum are different
Explanation:
The speed of all the electromagnetic radiation are always same and equal to the numerical value 3 x 10^8m/sec.
Correct Answer: C1 = C2
Explanation:
C1= capacitance of gold plates
C2= capacitance of aluminium plates
rg= Gold?s resistivity
ra= Aluminium?s resistivity
As the capacitance depends on the shape, size & geometrical placing of the conductors & the medium between them, hence, the value of capacitance will be independent of resistivity. Therefore, C1= C2
Correct Answer: below freezing point
Correct Answer: normal
Correct Answer: Kepler's Laws
Correct Answer: 20
Correct Answer: non-uniform
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