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Sergio [31]
3 years ago
15

What happens to the potential energy of a stationary charge when it begins to move freely from one point to another under the in

fluence of an electric field?
It increases.
It decreases.
It remains the same.
It becomes zero.
Physics
2 answers:
Ulleksa [173]3 years ago
8 0
It decreases and the decrease in the energy level appear as a kinetic energy of the charge
german3 years ago
8 0

Answer: Option (b) is the correct answer.

Explanation:

Potential energy is the energy obtained by an object due to its position. Whereas kinetic energy is the energy obtained by an object due to its motion.

For example, when a charge moves from one point to another then it means the charge has come to motion.

Thus, we can conclude that potential energy of a stationary charge when it begins to move freely from one point to another under the influence of an electric field decreases.

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The device or instrument that transforms light energy to electrical energy​
WINSTONCH [101]

Answer:

Solar panels

sun light into electricity

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3 years ago
Initial velocity vector vA has a magnitude of 3.00 meters per second and points 20.0o north of east, while final velocity vector
garri49 [273]

Answer:

5.2\ \text{m/s}

70^{\circ} south of east

Explanation:

v_a = 3 m/s

\theta_a = 20^{\circ} north of east

v_b = 6 m/s

\theta_b = 40^{\circ} south of east = 360-40=320^{\circ} north of east

x and y component of v_a

v_{ax}=v_a\cos \theta\\\Rightarrow v_{ax}=3\times \cos 20^{\circ}\\\Rightarrow v_{ax}=2.82\ \text{m/s}

v_{ay}=v_a\sin\theta\\\Rightarrow v_{ay}=3\times \sin20^{\circ}\\\Rightarrow v_{ay}=1.03\ \text{m/s}

x and y component of v_b

v_{bx}=v_b\cos \theta\\\Rightarrow v_{bx}=6\times \cos 320^{\circ}\\\Rightarrow v_{bx}=4.6\ \text{m/s}

v_{by}=v_b\sin\theta\\\Rightarrow v_{by}=6\times \sin320^{\circ}\\\Rightarrow v_{by}=-3.86\ \text{m/s}

\Delta v=v_b-v_a\\\Rightarrow \Delta v=(4.6-2.82)\hat{i}+(-3.86-1.03)\hat{j}\\\Rightarrow \Delta v=1.78\hat[i}-4.89\hat{j}

Magnitude

|\Delta v|=\sqrt{(-4.89)^2+1.78^2}\\\Rightarrow \Delta v=5.2\ \text{m/s}

Direction

\theta=\tan{-1}|\dfrac{-4.89}{1.78}|\\\Rightarrow \theta=70^{\circ}

The magnitude of the change in velocity vector is 5.2\ \text{m/s} and the direction is 70^{\circ} south of east.

6 0
3 years ago
Friction force affects the work done by the applied force.<br><br>T OR F ​
lakkis [162]

Answer:

TRUE.

Explanation:

YES IT EFFECTS.

IT MAY HELP YOU.

7 0
3 years ago
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CONVERT 5 SOLAR DAYS INTO SECOND​
zhannawk [14.2K]

Answer:

5 solar days is 432,000 seconds

Explanation:

One solar day is the time the meridian of the Sun crosses passes through a specified place.

Due to the elliptical orbit of the Earth round the Sun, one average solar day on Earth is equivalent to 24 hours with some days longer and some days shorter each by a few minutes

Therefore, we have;

5 solar days = 5 × 24 hours × 60 minutes/hour × 60 seconds/minute = 432,000 seconds

5 solar days = 432,000 seconds

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Which kind of electromagnetic radiation has a wavelength that is about the size of a person?
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