Starting with only the Balmer series light (visible light), how could we ensure that the solar panels generate a current that Ma
rk can use for his power station? (It may help to look at the electromagnetic spectrum from week 3):
a. By gradually increasing the brightness (amount) of light that we shine on it.
b. By gradually increasing the frequency of the light we shine on it.
c. By gradually increasing the wavelength of the light that we shine on it.
a. By gradually increasing the brightness (amount) of light that we shine on it.
b. By gradually increasing the frequency of the light we shine on it.
c. By gradually increasing the wavelength of the light that we shine on it.
2 answers:
The current in the solar panel generates by increasing the brightness of light that we shine on it. Hence, option (a) is correct.
Further Explanation:
Solar panels generate current using the principles of photoelectric emission. It states that when light of suitable frequency falls on any photosensitive substance, a photon of the incident radiation interacts with an electron of substance and liberates it out from surface of substance
(a)
On increasing the brightness of light, the intensity increases. With the increase in intensity, the number of incident photon increases. With the increase in number of photon, the photon energy increases. With the increase in energy of photon, number of liberated electrons increases because photon energy is required to excite or liberate the electrons. With the increase in number of liberated electrons, the current increase as current is the rate of flow of electrons with time. Hence, current increases with the increase in brightness of incident light.
(b)
On increasing the frequency of light, the energy of photon increases. However, the number of incident photon remains same because intensity remains unchanged. Hence, liberated electrons will have more energy but the number of electrons is unchanged. Therefore, current will not changed with the increase in frequency of light.
(c)
On increasing the wavelength of light, the energy of photon decreases. However, the number of incident photon remains same because intensity is not changed. Hence, liberated electrons will have lesser energy but the number of electrons is unchanged. Therefore, current will not changed with the increase in wavelength of light.
Learn More:
1. Volume of gas after expansion: brainly.com/question/9979757
2. Principle of conservation of momentum: brainly.com/question/9484203
3. Average translational kinetic energy: brainly.com/question/9078768
Answer Details:
Grade: Middle School
Subject: Physics
Chapter: Atoms and nuclei
Keywords:
Balmer, series, light, visible, solar, panels, generate, current, Mark, power, station, electromagnetic, spectrum, week, gradually, increasing, brightness, shine, frequency, wavelength, energy, photon, liberated, electrons, unchanged and incident.
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Explanation:
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Answer:
230
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Ans:
1. τbiceps = +(Positive)
2. τforearm = -(Negative)
3. τball = -(Negative)
Explanation:
The figure is attached down below.
1. T<span>orque about the elbow caused by the biceps, τbiceps:
Since Torque = r x F (where r and F are the vectors)
</span>Where r is the vector from elbow to the biceps.
<span>
We can see in the figure that F(biceps) is in upward direction, and by applying the right hand rule from r to F, we get the counterclockwise direction. The torque in counterclockwise direction is positive(+). Therefore, the sign would be +.
2. </span>Torque about the the weight of the forearm, τforearm:
Since Torque = r x F (where r and F are the vectors)
Where r is the vector from elbow to the forearm.
Also weight is the special kind of Force caused by the gravity.
We can see in the figure that W(forearm) is in downward direction, and by applying the right hand rule from r to F, we get the clockwise direction. The torque in clockwise direction is negative(-). Therefore, the sign would be -.
3. Torque about the the weight of the ball, τball:
Since Torque = r x F (where r and F are the vectors)
Where r is the vector from elbow to the ball.
Also weight is the special kind of Force caused by the gravity.
We can see in the figure that W(ball) is in downward direction, and by applying the right hand rule from r to F, we get the clockwise direction. The torque in clockwise direction is negative(-). Therefore, the sign would be -.
1. τbiceps = +(Positive)
2. τforearm = -(Negative)
3. τball = -(Negative)
Explanation:
The figure is attached down below.
1. T<span>orque about the elbow caused by the biceps, τbiceps:
Since Torque = r x F (where r and F are the vectors)
</span>Where r is the vector from elbow to the biceps.
<span>
We can see in the figure that F(biceps) is in upward direction, and by applying the right hand rule from r to F, we get the counterclockwise direction. The torque in counterclockwise direction is positive(+). Therefore, the sign would be +.
2. </span>Torque about the the weight of the forearm, τforearm:
Since Torque = r x F (where r and F are the vectors)
Where r is the vector from elbow to the forearm.
Also weight is the special kind of Force caused by the gravity.
We can see in the figure that W(forearm) is in downward direction, and by applying the right hand rule from r to F, we get the clockwise direction. The torque in clockwise direction is negative(-). Therefore, the sign would be -.
3. Torque about the the weight of the ball, τball:
Since Torque = r x F (where r and F are the vectors)
Where r is the vector from elbow to the ball.
Also weight is the special kind of Force caused by the gravity.
We can see in the figure that W(ball) is in downward direction, and by applying the right hand rule from r to F, we get the clockwise direction. The torque in clockwise direction is negative(-). Therefore, the sign would be -.