142349
If the distance of $100 \mathrm{~W}$ lamp is increased from a photocell, the saturation current $i$ in the photocell varies with the distance $d$ as
1 i $\propto d^{2}$
2 $\mathrm{i} \propto \mathrm{d}$
3 $\mathrm{i} \propto \frac{1}{\mathrm{~d}}$
4 $\mathrm{i} \propto \frac{1}{\mathrm{~d}^{2}}$
Explanation:
D We know that, Intensity $(\mathrm{I})=\mathrm{P} / \mathrm{A}$ $\mathrm{I} \propto \frac{1}{\mathrm{~d}^{2}} \Rightarrow \quad \mathrm{I} \propto\left(\frac{\mathrm{n}}{\mathrm{t}}\right)$ Where, $\mathrm{n}=$ number of photon emitted at the surface.
VITEEE-2014
Dual nature of radiation and Matter
142352
The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon :
1 wavelength
2 frequency
3 intensity
4 work function
Explanation:
C From Einstein's equation of photoelectric effect $\mathrm{KE}_{\max }=\mathrm{h}\left(v-v_{0}\right)$ $\therefore$ The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon intensity of light.
Karnataka CET-2008
Dual nature of radiation and Matter
142336
The material that is not photo sensitive to visible light is
1 caesium
2 sodium
3 rubidium
4 cadmium
5 potassium
Explanation:
D Cadmium is sensitive to ultraviolet light while the rest are sensitive even to visible light. It required low threshold energy.
Kerala CEE 04.07.2022
Dual nature of radiation and Matter
142338
Out of following statements which one is correct?
1 The current in photocell increases with increasing frequency.
2 The stopping potential increases with increase in intensity of incident light.
3 The photocurrent is proportional to the applied voltage.
4 The photocurrent increases with intensity of incident light.
Explanation:
D The photocurrent increases with increase in intensity of incident light.
MHT-CET 2020
Dual nature of radiation and Matter
142340
Photoelectric cell is 'NOT' used in
1 exposure meter
2 burglar alarm
3 sound reproduction from motion pictures
4 brake indicators in vehicles
Explanation:
D Photoelectric cells are used is burglar and smoke alarms. In burglar alarms if the beam of light is being disrupted. Then alarm goes off for fire alarms they detect smoke and heat and indicate if one fire is there.
142349
If the distance of $100 \mathrm{~W}$ lamp is increased from a photocell, the saturation current $i$ in the photocell varies with the distance $d$ as
1 i $\propto d^{2}$
2 $\mathrm{i} \propto \mathrm{d}$
3 $\mathrm{i} \propto \frac{1}{\mathrm{~d}}$
4 $\mathrm{i} \propto \frac{1}{\mathrm{~d}^{2}}$
Explanation:
D We know that, Intensity $(\mathrm{I})=\mathrm{P} / \mathrm{A}$ $\mathrm{I} \propto \frac{1}{\mathrm{~d}^{2}} \Rightarrow \quad \mathrm{I} \propto\left(\frac{\mathrm{n}}{\mathrm{t}}\right)$ Where, $\mathrm{n}=$ number of photon emitted at the surface.
VITEEE-2014
Dual nature of radiation and Matter
142352
The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon :
1 wavelength
2 frequency
3 intensity
4 work function
Explanation:
C From Einstein's equation of photoelectric effect $\mathrm{KE}_{\max }=\mathrm{h}\left(v-v_{0}\right)$ $\therefore$ The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon intensity of light.
Karnataka CET-2008
Dual nature of radiation and Matter
142336
The material that is not photo sensitive to visible light is
1 caesium
2 sodium
3 rubidium
4 cadmium
5 potassium
Explanation:
D Cadmium is sensitive to ultraviolet light while the rest are sensitive even to visible light. It required low threshold energy.
Kerala CEE 04.07.2022
Dual nature of radiation and Matter
142338
Out of following statements which one is correct?
1 The current in photocell increases with increasing frequency.
2 The stopping potential increases with increase in intensity of incident light.
3 The photocurrent is proportional to the applied voltage.
4 The photocurrent increases with intensity of incident light.
Explanation:
D The photocurrent increases with increase in intensity of incident light.
MHT-CET 2020
Dual nature of radiation and Matter
142340
Photoelectric cell is 'NOT' used in
1 exposure meter
2 burglar alarm
3 sound reproduction from motion pictures
4 brake indicators in vehicles
Explanation:
D Photoelectric cells are used is burglar and smoke alarms. In burglar alarms if the beam of light is being disrupted. Then alarm goes off for fire alarms they detect smoke and heat and indicate if one fire is there.
142349
If the distance of $100 \mathrm{~W}$ lamp is increased from a photocell, the saturation current $i$ in the photocell varies with the distance $d$ as
1 i $\propto d^{2}$
2 $\mathrm{i} \propto \mathrm{d}$
3 $\mathrm{i} \propto \frac{1}{\mathrm{~d}}$
4 $\mathrm{i} \propto \frac{1}{\mathrm{~d}^{2}}$
Explanation:
D We know that, Intensity $(\mathrm{I})=\mathrm{P} / \mathrm{A}$ $\mathrm{I} \propto \frac{1}{\mathrm{~d}^{2}} \Rightarrow \quad \mathrm{I} \propto\left(\frac{\mathrm{n}}{\mathrm{t}}\right)$ Where, $\mathrm{n}=$ number of photon emitted at the surface.
VITEEE-2014
Dual nature of radiation and Matter
142352
The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon :
1 wavelength
2 frequency
3 intensity
4 work function
Explanation:
C From Einstein's equation of photoelectric effect $\mathrm{KE}_{\max }=\mathrm{h}\left(v-v_{0}\right)$ $\therefore$ The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon intensity of light.
Karnataka CET-2008
Dual nature of radiation and Matter
142336
The material that is not photo sensitive to visible light is
1 caesium
2 sodium
3 rubidium
4 cadmium
5 potassium
Explanation:
D Cadmium is sensitive to ultraviolet light while the rest are sensitive even to visible light. It required low threshold energy.
Kerala CEE 04.07.2022
Dual nature of radiation and Matter
142338
Out of following statements which one is correct?
1 The current in photocell increases with increasing frequency.
2 The stopping potential increases with increase in intensity of incident light.
3 The photocurrent is proportional to the applied voltage.
4 The photocurrent increases with intensity of incident light.
Explanation:
D The photocurrent increases with increase in intensity of incident light.
MHT-CET 2020
Dual nature of radiation and Matter
142340
Photoelectric cell is 'NOT' used in
1 exposure meter
2 burglar alarm
3 sound reproduction from motion pictures
4 brake indicators in vehicles
Explanation:
D Photoelectric cells are used is burglar and smoke alarms. In burglar alarms if the beam of light is being disrupted. Then alarm goes off for fire alarms they detect smoke and heat and indicate if one fire is there.
142349
If the distance of $100 \mathrm{~W}$ lamp is increased from a photocell, the saturation current $i$ in the photocell varies with the distance $d$ as
1 i $\propto d^{2}$
2 $\mathrm{i} \propto \mathrm{d}$
3 $\mathrm{i} \propto \frac{1}{\mathrm{~d}}$
4 $\mathrm{i} \propto \frac{1}{\mathrm{~d}^{2}}$
Explanation:
D We know that, Intensity $(\mathrm{I})=\mathrm{P} / \mathrm{A}$ $\mathrm{I} \propto \frac{1}{\mathrm{~d}^{2}} \Rightarrow \quad \mathrm{I} \propto\left(\frac{\mathrm{n}}{\mathrm{t}}\right)$ Where, $\mathrm{n}=$ number of photon emitted at the surface.
VITEEE-2014
Dual nature of radiation and Matter
142352
The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon :
1 wavelength
2 frequency
3 intensity
4 work function
Explanation:
C From Einstein's equation of photoelectric effect $\mathrm{KE}_{\max }=\mathrm{h}\left(v-v_{0}\right)$ $\therefore$ The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon intensity of light.
Karnataka CET-2008
Dual nature of radiation and Matter
142336
The material that is not photo sensitive to visible light is
1 caesium
2 sodium
3 rubidium
4 cadmium
5 potassium
Explanation:
D Cadmium is sensitive to ultraviolet light while the rest are sensitive even to visible light. It required low threshold energy.
Kerala CEE 04.07.2022
Dual nature of radiation and Matter
142338
Out of following statements which one is correct?
1 The current in photocell increases with increasing frequency.
2 The stopping potential increases with increase in intensity of incident light.
3 The photocurrent is proportional to the applied voltage.
4 The photocurrent increases with intensity of incident light.
Explanation:
D The photocurrent increases with increase in intensity of incident light.
MHT-CET 2020
Dual nature of radiation and Matter
142340
Photoelectric cell is 'NOT' used in
1 exposure meter
2 burglar alarm
3 sound reproduction from motion pictures
4 brake indicators in vehicles
Explanation:
D Photoelectric cells are used is burglar and smoke alarms. In burglar alarms if the beam of light is being disrupted. Then alarm goes off for fire alarms they detect smoke and heat and indicate if one fire is there.
142349
If the distance of $100 \mathrm{~W}$ lamp is increased from a photocell, the saturation current $i$ in the photocell varies with the distance $d$ as
1 i $\propto d^{2}$
2 $\mathrm{i} \propto \mathrm{d}$
3 $\mathrm{i} \propto \frac{1}{\mathrm{~d}}$
4 $\mathrm{i} \propto \frac{1}{\mathrm{~d}^{2}}$
Explanation:
D We know that, Intensity $(\mathrm{I})=\mathrm{P} / \mathrm{A}$ $\mathrm{I} \propto \frac{1}{\mathrm{~d}^{2}} \Rightarrow \quad \mathrm{I} \propto\left(\frac{\mathrm{n}}{\mathrm{t}}\right)$ Where, $\mathrm{n}=$ number of photon emitted at the surface.
VITEEE-2014
Dual nature of radiation and Matter
142352
The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon :
1 wavelength
2 frequency
3 intensity
4 work function
Explanation:
C From Einstein's equation of photoelectric effect $\mathrm{KE}_{\max }=\mathrm{h}\left(v-v_{0}\right)$ $\therefore$ The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon intensity of light.
Karnataka CET-2008
Dual nature of radiation and Matter
142336
The material that is not photo sensitive to visible light is
1 caesium
2 sodium
3 rubidium
4 cadmium
5 potassium
Explanation:
D Cadmium is sensitive to ultraviolet light while the rest are sensitive even to visible light. It required low threshold energy.
Kerala CEE 04.07.2022
Dual nature of radiation and Matter
142338
Out of following statements which one is correct?
1 The current in photocell increases with increasing frequency.
2 The stopping potential increases with increase in intensity of incident light.
3 The photocurrent is proportional to the applied voltage.
4 The photocurrent increases with intensity of incident light.
Explanation:
D The photocurrent increases with increase in intensity of incident light.
MHT-CET 2020
Dual nature of radiation and Matter
142340
Photoelectric cell is 'NOT' used in
1 exposure meter
2 burglar alarm
3 sound reproduction from motion pictures
4 brake indicators in vehicles
Explanation:
D Photoelectric cells are used is burglar and smoke alarms. In burglar alarms if the beam of light is being disrupted. Then alarm goes off for fire alarms they detect smoke and heat and indicate if one fire is there.
