Hiii
☆Can anyone help me in physics
☆question is in attachment
☆chose the correct answer with reason
Answers
1. C
Explanation:
Wavelength is the distance between two consecutive crest or trough or alternate mean point.
2. C
Explanation :
Sound wave is a longitudinal wave. Due to the movement of air molecule horizontally, the flame will vibrate <----->
3. D. Sound wave
Explanation :
Light , all electromagnetic waves are transverse wave. Water waves are both longitudinal and transverse.
4.B. Repel each other.
Explanation :
Like charges repel each other while alike attracts each other.
5. D
Explanation :
Second sphere has to be neutral and that eliminates option A and B. +ve charge at first sphere would polarise negative charges on the nearer side of second sphere and that is why option D is correct.
6. A
Explanation :
Evaporation causes cooling. Hence, temperature decreases. Now, average energy (1.5RT) is directly proportional to temperature , hence, average energy decreases.
1] C → Distance is the wavelength
2] C → Longitudinal (←—→)
3] D → Longitudinal waves displacement is in the same direction as the direction of the travel of the wave.
4] B → Two Like charges repel each other
5] D → +ve charges will attract -ve charges & also repel +ve charges
6] A → Avg. Energy & Temperature both decreases