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mel-nik [20]
3 years ago
5

When measuring speed, you will measure the

Physics
1 answer:
qaws [65]3 years ago
5 0

Answer:

Speed is the rate at which an object's position changes, measured in meters per second. The equation for speed is simple: distance divided by time

Explanation:

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An electron is accelerqated in the uniform field betwen two parallel charged oplates. The separation of the plates is 1.20 cm
marysya [2.9K]

Answer:

The speed of electron is 8.7\times10^{6}\ m/s

Explanation:

Given that,

Separation of the plate = 1.20 cm

Suppose the field is E=1.80\times10^{4}\ N/C.

If the electron is accelerated from rest near the negative plate and passes through a tiny hole in the positive plate.

What the speed does it leave the hole?

We need to calculate the acceleration

Using formula of electric force

F = qE

ma=qE

a=\dfrac{qE}{m}

We need to calculate the speed of electron

Using equation of motion

v^2=u^2+2as

v^2=2as

Put the value of acceleration in the formula

v^2=2\times\dfrac{qE}{m}\times s

Put the value into the formula

v^2=2\times\dfrac{1.6\times10^{-19}\times1.80\times10^{4}\times1.20\times10^{-2}}{9.11\times10^{-31}}

v=\sqrt{2\times\dfrac{1.6\times10^{-19}\times1.80\times10^{4}\times1.20\times10^{-2}}{9.11\times10^{-31}}}

v=8.7\times10^{6}\ m/s

Hence, The speed of electron is 8.7\times10^{6}\ m/s

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