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- Question
The wavelength of a wave is the distance between
Options- A. Crest and Trough
- B. Crest and Crest
- C. Trough and Trough
- D. Both B & C
- Correct Answer
- Both B & C
ExplanationDistance between two Consecutive Crests or two Consecutive Troughs is called Wavelength. But the distance between crest and adjacent trough is half the wavelength.
That is the distance between adjacent crest and trough is called Half the wavelength.
- 1. On the Kelvin scale ,the melting point of ice is
Options- A. 373K
- B. 100K
- C. 273K
- D. 0 K Discuss
- 2. Rolling friction is caused by ____ from the following?
Options- A. Non-elastic effects
- B. Gravity
- C. Power dissipation
- D. Buoyancy Discuss
- 3. Energy is continuously generated in the sun due to
Options- A. Nuclear fusion
- B. Nuclear fission
- C. Radioactivity
- D. Artificial radioactivity Discuss
- 4. When an electric bulb breaks , there is an explosive sound. That is due to
Options- A. the chemical reaction between the gases inside the bulb
- B. the compressed gases inside rushing out suddenly
- C. the air outside rushing in to fill the vacuum inside the bulb
- D. None of these Discuss
- 5. Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines in the emission spectra will be
Options- A. 2
- B. 6
- C. 5
- D. 3 Discuss
- 6. An object at rest may have
Options- A. Momentum
- B. Potential energy
- C. Velocity
- D. Kinetic energy Discuss
- 7. Which of the following is a vector quantity
Options- A. momentum
- B. pressure
- C. Energy
- D. work Discuss
- 8. The Hydraulic Break works on the principle of _____ ?
Options- A. Pascal's Law
- B. Boyle's law
- C. Coulomb's law
- D. Bernouli's law Discuss
- 9. Which liquid is the most viscous?
Options- A. Water
- B. Diesel
- C. Milk
- D. Oil Discuss
- 10. How many laws of physics are there?
Options- A. 5
- B. 4
- C. 3
- D. 2 Discuss
Physics problems
Search Results
Correct Answer: 273K
Correct Answer: Non-elastic effects
Explanation:
Rolling friction or rolling drag is the force resisting the motion when a body rolls on a surface. It is mainly caused by non-elastic effects, that is, not all the energy needed for deformation of the wheel, roadbed, etc... is recovered when the pressure is removed.
Another cause of rolling resistance lies in the slippage between the wheel and the surface, which dissipates energy.
Correct Answer: Nuclear fusion
Correct Answer: the air outside rushing in to fill the vacuum inside the bulb
Explanation:
The inside of the bulb being a vacuum, the outside air rushes in when the bulb is broken. The vibrations of the rushing air molecules produce the sound.
Correct Answer: 6
Explanation:
Number of spectral lines from a state n to ground state is
n(n-1)/2 = 6
Correct Answer: Potential energy
Explanation:
An object at rest may have Potential energy.
Correct Answer: momentum
Correct Answer: Pascal's Law
Correct Answer: Oil
Explanation:
Here Oil is the most viscous liquid.
The liquid with the most intermolecular force is high viscous. viscosity is how smoothly a liquid flows and how hardly the liquid flows it is highly viscous.
Correct Answer: 3
Explanation:
Physics has 5 laws. But the 3 laws of Newton has been clubbed together under one Law. Therefore there are 3 Newtons laws of Physics. They are ::
1. Newtons Laws of Motion
a. First Law of Motion
b. Second Law of Motion
C. Third Law of Motion
2. Newtons Law of Cooling
3. Newtons Law of Gravitation.
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