D Einstein was awarded Nobel Prize for photoelectric effect. Albert Einstein won Nobel Prize in physics in 1921 Photoelectric effect- A Phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation.
Shift-I
Dual nature of radiation and Matter
141998
The study of photoelectric effect is useful in understanding:
1 Quantization of charge
2 Quantization of energy
3 Conservation of energy
4 Conservation of kinetic energy
Explanation:
B Electromagnet radiation is made of different packet of discrete energy called photon.
Shift-I
Dual nature of radiation and Matter
141999
Light of frequency 1.5 times the threshold frequency is incident on photosensitive material. If the frequency is halved and intensity is doubled the photoelectron becomes
1 halved
2 quadrupled
3 zero
4 doubled
Explanation:
C Given that, Threshold frequency $(v)=1.5 v_{0}$ Frequency is made half, $v=\frac{1.5 v_{0}}{2}=0.75 v_{0}$ $0.75 v_{0} \lt v_{0}$ i.e. $v$ is less than threshold frequency zero current will flow.
NEET (Sep.)- 2020
Dual nature of radiation and Matter
142000
Among the following photosensitive substances, the one which emits electrons when it is illuminated by visible light is
1 magnesium
2 zinc
3 sodium
4 cadmium
5 platinum
Explanation:
C Alkali metals such as sodium, potassium cesium and rubidium will responded to visible light. These substances are called photo sensitive surfaces because they will emit electrons when light falls on them. Certain metals, like zinc cadmium magnesium etc respond only to UV light.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
Dual nature of radiation and Matter
141997
Einstein was awarded Nobel Prize for:
1 The theory of relativity
2 General theory of relativity
3 Brownian motion
4 Photoelectric effect
Explanation:
D Einstein was awarded Nobel Prize for photoelectric effect. Albert Einstein won Nobel Prize in physics in 1921 Photoelectric effect- A Phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation.
Shift-I
Dual nature of radiation and Matter
141998
The study of photoelectric effect is useful in understanding:
1 Quantization of charge
2 Quantization of energy
3 Conservation of energy
4 Conservation of kinetic energy
Explanation:
B Electromagnet radiation is made of different packet of discrete energy called photon.
Shift-I
Dual nature of radiation and Matter
141999
Light of frequency 1.5 times the threshold frequency is incident on photosensitive material. If the frequency is halved and intensity is doubled the photoelectron becomes
1 halved
2 quadrupled
3 zero
4 doubled
Explanation:
C Given that, Threshold frequency $(v)=1.5 v_{0}$ Frequency is made half, $v=\frac{1.5 v_{0}}{2}=0.75 v_{0}$ $0.75 v_{0} \lt v_{0}$ i.e. $v$ is less than threshold frequency zero current will flow.
NEET (Sep.)- 2020
Dual nature of radiation and Matter
142000
Among the following photosensitive substances, the one which emits electrons when it is illuminated by visible light is
1 magnesium
2 zinc
3 sodium
4 cadmium
5 platinum
Explanation:
C Alkali metals such as sodium, potassium cesium and rubidium will responded to visible light. These substances are called photo sensitive surfaces because they will emit electrons when light falls on them. Certain metals, like zinc cadmium magnesium etc respond only to UV light.
D Einstein was awarded Nobel Prize for photoelectric effect. Albert Einstein won Nobel Prize in physics in 1921 Photoelectric effect- A Phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation.
Shift-I
Dual nature of radiation and Matter
141998
The study of photoelectric effect is useful in understanding:
1 Quantization of charge
2 Quantization of energy
3 Conservation of energy
4 Conservation of kinetic energy
Explanation:
B Electromagnet radiation is made of different packet of discrete energy called photon.
Shift-I
Dual nature of radiation and Matter
141999
Light of frequency 1.5 times the threshold frequency is incident on photosensitive material. If the frequency is halved and intensity is doubled the photoelectron becomes
1 halved
2 quadrupled
3 zero
4 doubled
Explanation:
C Given that, Threshold frequency $(v)=1.5 v_{0}$ Frequency is made half, $v=\frac{1.5 v_{0}}{2}=0.75 v_{0}$ $0.75 v_{0} \lt v_{0}$ i.e. $v$ is less than threshold frequency zero current will flow.
NEET (Sep.)- 2020
Dual nature of radiation and Matter
142000
Among the following photosensitive substances, the one which emits electrons when it is illuminated by visible light is
1 magnesium
2 zinc
3 sodium
4 cadmium
5 platinum
Explanation:
C Alkali metals such as sodium, potassium cesium and rubidium will responded to visible light. These substances are called photo sensitive surfaces because they will emit electrons when light falls on them. Certain metals, like zinc cadmium magnesium etc respond only to UV light.
D Einstein was awarded Nobel Prize for photoelectric effect. Albert Einstein won Nobel Prize in physics in 1921 Photoelectric effect- A Phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation.
Shift-I
Dual nature of radiation and Matter
141998
The study of photoelectric effect is useful in understanding:
1 Quantization of charge
2 Quantization of energy
3 Conservation of energy
4 Conservation of kinetic energy
Explanation:
B Electromagnet radiation is made of different packet of discrete energy called photon.
Shift-I
Dual nature of radiation and Matter
141999
Light of frequency 1.5 times the threshold frequency is incident on photosensitive material. If the frequency is halved and intensity is doubled the photoelectron becomes
1 halved
2 quadrupled
3 zero
4 doubled
Explanation:
C Given that, Threshold frequency $(v)=1.5 v_{0}$ Frequency is made half, $v=\frac{1.5 v_{0}}{2}=0.75 v_{0}$ $0.75 v_{0} \lt v_{0}$ i.e. $v$ is less than threshold frequency zero current will flow.
NEET (Sep.)- 2020
Dual nature of radiation and Matter
142000
Among the following photosensitive substances, the one which emits electrons when it is illuminated by visible light is
1 magnesium
2 zinc
3 sodium
4 cadmium
5 platinum
Explanation:
C Alkali metals such as sodium, potassium cesium and rubidium will responded to visible light. These substances are called photo sensitive surfaces because they will emit electrons when light falls on them. Certain metals, like zinc cadmium magnesium etc respond only to UV light.
