Answer: 1. B. The number of electrons emitted from the metal per second increases.
2. The maximum speed of the emitted electrons increases.
The stopping potential increases
Explanation:
Photoelectric effect is simply referred to as the emission of electrons that occurs when there's an electromagnetic radiation. An example of such electromagnetic radiation is when material is being hit by light.
Assuming that the light incident on the metal surface causes electrons to be ejected from the metal, the number of electrons emitted from the metal per second increases if the intensity of the incident light is increased.
Also, if the initial light incident on the metal surface causes electrons to be ejected from the metal, the maximum speed of the emitted electrons increases and the stopping potential increases.
Answer:
16.5 m
Explanation:
Given,
Magnetic field = 0.02 T
radius of electron = 9 mm
speed of electron = speed of proton
radius of proton = ?
We know,
.........(1)
using newton second law
equating Force due to electron and proton
m_ e = 9.1 x 10⁻³¹ Kg and m_p = 1.67 x 10⁻²⁷ Kg
Hence, the radius of proton is equal to 16.5 m.
The answer is C because when the chemicals on the tip of a match are heated up from friction it ignites.
Explanation:
The Doppler effect states that "there is an decrease in frequency of sound, light and other forms of waves as the separation between the source and observer increases".
This leads to low pitch of sound being heard as source of sound moves away.
The Doppler effect also suggests that as a source approaches an observer, there is an increase in frequency of waves.
- This is why the sound heard by a siren fades away as a police vehicle moves away.
- Also, the intensity of light fades when we move away from it.
Learn more:
Frequency brainly.com/question/5354733
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