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4 years ago

If the frequency of the light shining on the metal is increased, will the number of electrons being emitted increase?

Physics

1 answer:

Luden [163]4 years ago

7 0

Answer:

Explanation:

In the photoelectric effect,

The number of the electrons which are being emitted is directly proportional to the intensity of the light and is independent on the frequency of the incident radiation of the light which has the frequency greater than the threshold frequency.

Thus, on increasing the frequency of the light which is being shinned on the metal , there is no change in the electrons which are being emitted.

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3 years ago

A car has a uniform acceleration of 5 m/s2. What distance will it cover in 10 s after start

amm1812

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3 years ago

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3 years ago

A ball was rolling downhill at 2 m/s. After 5s, it was rolling at 90 m/s. What is its acceleration?

olga55 [171]

Answer:

17.6 m/s²

Explanation:

Given:

$v_{f}$ = 90 m/s (final velocity)

$v_{i}$ = 2 m/s (initial velocity)

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The formula for acceleration is:

$a_{avg}$ = Δv / Δt

We can find Δv by doing

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Replace the values

Δv = 90m/s - 2m/s

Δv= 88m/s

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$a_{avg}$ = Δv / Δt

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3 years ago

What length of a certain metal wire of diameter 0.15 mm is needed for the wire to have a resistance of 15 ω? the resistivity of

Murljashka [212]

The resistance of the cylindrical wire is $R=\frac{\rho l}{A}$ .

Here $R$ is the resistance, $l$ is the length of the wire and $A$ is the area of cross section. Since the wire is cylindrical $A=\frac{\pi d^2}{4}$ . Rearranging the above equation,