David Lewis

2022-01-03

An electron with an initial speed of $6.00\times {10}^{5}$ m/sm/s is brought to rest by an electric field.

a)Did the electron move into a region of higher potential or lower potential?

b)What was the potential difference that stopped the electron?

c)What was the initial kinetic energy of the electron, in electron volts?

a)Did the electron move into a region of higher potential or lower potential?

b)What was the potential difference that stopped the electron?

c)What was the initial kinetic energy of the electron, in electron volts?

Anzante2m

Beginner2022-01-04Added 34 answers

(a) Electron moves into a region of lower potential because it must moves in the opposite direction of force to get in rest.

(b) The stopping potential difference for the electrons is,

$\frac{m{v}^{2}}{2}=-q\mathrm{\u25b3}V$

$\mathrm{\u25b3}V=\frac{m{v}^{2}}{2e}$

Substitute the values,

Substitute the values,

$\mathrm{\u25b3}V=\frac{(9.11\times {10}^{-31}kg){(6.00\times {10}^{5}\frac{m}{s})}^{2}}{2(1.602\times {10}^{-19}C)}$

$=102.4\times {10}^{-2}$ V

$\approx 1.02$ V

c) The initial kinetic energy of the electrons in electron volt is,

$\mathrm{\u25b3}K=\frac{m{v}^{2}}{2}$

$={\frac{9.11\times {10}^{-31}kg}{6.00\times {10}^{5}\frac{m}{s}}}^{2}\}\left\{2\right\}$

$=1.64\times {10}^{-19}J\left(\frac{1eV}{1.602\times {10}^{-19}J}\right)$

$=1.02eV$

(b) The stopping potential difference for the electrons is,

Substitute the values,

Substitute the values,

c) The initial kinetic energy of the electrons in electron volt is,

Jazz Frenia

Skilled2023-05-14Added 106 answers

Nick Camelot

Skilled2023-05-14Added 164 answers

Andre BalkonE

Skilled2023-05-14Added 110 answers

22+64

When a cold drink is taken from a refrigerator, its temperature is 5 degree C. After 25 minutes in a 20 degree C room its temperature has increased to 10 degree C. What is the temperature of the drink after 50 minutes?

How many minutes are there in $2\frac{3}{5}$ hours?

Find the answer for $64$ power $\frac{1}{6}$.

The following law describes the relationship between gas volume and pressure: ________. A)Boyle's law; B)Henry's law; C)Charles' law; D)Dalton's law

If an electric switch is open then no current flows through the circuit.

A)True;

B)FalseThe price elasticity of supply of a good is 0.8. Its price rises by 50 per cent. Calculate the percentage increase in its supply.

How many quarts are in 10 gallons?

When the net force acting on an object is zero, the total momentum of the system will:

A)remain constant;

B)increase with time;

C)decrease with time;

D)None of theseHow many centimeters are in four meters?

A notebook computer has a mass of 2.25 kilograms. About how many pounds does the notebook weigh?

If the dot product of two non-zero vectors is zero, then the vectors A)are parallel to each other. B)are perpendicular to each other. C)can have any orientation. D)are anti-parallel to each other.

Which is longer 5 miles or 10 kilometers?

9 grams is how many milligrams?

How to write $673.5$ in scientific notation?