Electron Emission, Photo Electric Effect (Threshol Frequency Stopping Potential)
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Dual nature of radiation and Matter

142118 Light of wavelength $0.6 \mu \mathrm{m}$ from a sodium lamp falls on a photocell and causes the emission of photoelectrons for which the stopping potential is $0.5 \mathrm{~V}$. With light of wavelength $0.4 \mu \mathrm{m}$ from a sodium lamp, the stopping potential is $1.5 \mathrm{~V}$. With this data, the value of $h / e$ is

1 $4 \times 10^{-59} \mathrm{~V} \mathrm{~s}$
2 $0.25 \times 10^{+55} \mathrm{~V} \mathrm{~s}$
3 $4 \times 10^{-15} \mathrm{~V} \mathrm{~s}$
4 $4 \times 10^{-8} \mathrm{~V} \mathrm{~s}$
J and K CET- 2000
Dual nature of radiation and Matter

142123 The work function of metals is in the range of 2 $\mathrm{eV}$ to $5 \mathrm{eV}$. Find which of the following wavelength of light cannot be used for photoelectric effect? (Consider, Plank constant $=4 \times 10^{-15} \mathrm{eVs}$, velocity of light $=3 \times 10^{8} \mathrm{~m} / \mathrm{s}$ )

1 $510 \mathrm{~nm}$
2 $650 \mathrm{~nm}$
3 $400 \mathrm{~nm}$
4 $570 \mathrm{~nm}$
WB JEE 2015
Dual nature of radiation and Matter

142124 When a certain metal surface is illuminated with light of frequency $v$, the stopping potential for photoelectric current is $V_{0}$. When the same surface is illuminated by light of frequency $\frac{v}{2}$, the stopping potential is $\frac{v_{0}}{4}$. The threshold frequency for photoelectric, emission is

1 $\frac{v}{6}$
2 $\frac{v}{3}$
3 $\frac{2 v}{3}$
4 $\frac{4 v}{3}$
WB JEE 2012
Dual nature of radiation and Matter

142127 If separation between screen and source is increased by $2 \%$ what would be the effect on the intensity?

1 Increased by $4 \%$
2 Increased by $2 \%$
3 Decreased by $2 \%$
4 Decreased by $4 \%$
UP CPMT-2003
Join With Us for More Updates
Dual nature of radiation and Matter

142118 Light of wavelength $0.6 \mu \mathrm{m}$ from a sodium lamp falls on a photocell and causes the emission of photoelectrons for which the stopping potential is $0.5 \mathrm{~V}$. With light of wavelength $0.4 \mu \mathrm{m}$ from a sodium lamp, the stopping potential is $1.5 \mathrm{~V}$. With this data, the value of $h / e$ is

1 $4 \times 10^{-59} \mathrm{~V} \mathrm{~s}$
2 $0.25 \times 10^{+55} \mathrm{~V} \mathrm{~s}$
3 $4 \times 10^{-15} \mathrm{~V} \mathrm{~s}$
4 $4 \times 10^{-8} \mathrm{~V} \mathrm{~s}$
J and K CET- 2000
Dual nature of radiation and Matter

142123 The work function of metals is in the range of 2 $\mathrm{eV}$ to $5 \mathrm{eV}$. Find which of the following wavelength of light cannot be used for photoelectric effect? (Consider, Plank constant $=4 \times 10^{-15} \mathrm{eVs}$, velocity of light $=3 \times 10^{8} \mathrm{~m} / \mathrm{s}$ )

1 $510 \mathrm{~nm}$
2 $650 \mathrm{~nm}$
3 $400 \mathrm{~nm}$
4 $570 \mathrm{~nm}$
WB JEE 2015
Dual nature of radiation and Matter

142124 When a certain metal surface is illuminated with light of frequency $v$, the stopping potential for photoelectric current is $V_{0}$. When the same surface is illuminated by light of frequency $\frac{v}{2}$, the stopping potential is $\frac{v_{0}}{4}$. The threshold frequency for photoelectric, emission is

1 $\frac{v}{6}$
2 $\frac{v}{3}$
3 $\frac{2 v}{3}$
4 $\frac{4 v}{3}$
WB JEE 2012
Dual nature of radiation and Matter

142127 If separation between screen and source is increased by $2 \%$ what would be the effect on the intensity?

1 Increased by $4 \%$
2 Increased by $2 \%$
3 Decreased by $2 \%$
4 Decreased by $4 \%$
UP CPMT-2003
For More Updates join with Us
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
Dual nature of radiation and Matter

142118 Light of wavelength $0.6 \mu \mathrm{m}$ from a sodium lamp falls on a photocell and causes the emission of photoelectrons for which the stopping potential is $0.5 \mathrm{~V}$. With light of wavelength $0.4 \mu \mathrm{m}$ from a sodium lamp, the stopping potential is $1.5 \mathrm{~V}$. With this data, the value of $h / e$ is

1 $4 \times 10^{-59} \mathrm{~V} \mathrm{~s}$
2 $0.25 \times 10^{+55} \mathrm{~V} \mathrm{~s}$
3 $4 \times 10^{-15} \mathrm{~V} \mathrm{~s}$
4 $4 \times 10^{-8} \mathrm{~V} \mathrm{~s}$
J and K CET- 2000
Dual nature of radiation and Matter

142123 The work function of metals is in the range of 2 $\mathrm{eV}$ to $5 \mathrm{eV}$. Find which of the following wavelength of light cannot be used for photoelectric effect? (Consider, Plank constant $=4 \times 10^{-15} \mathrm{eVs}$, velocity of light $=3 \times 10^{8} \mathrm{~m} / \mathrm{s}$ )

1 $510 \mathrm{~nm}$
2 $650 \mathrm{~nm}$
3 $400 \mathrm{~nm}$
4 $570 \mathrm{~nm}$
WB JEE 2015
Dual nature of radiation and Matter

142124 When a certain metal surface is illuminated with light of frequency $v$, the stopping potential for photoelectric current is $V_{0}$. When the same surface is illuminated by light of frequency $\frac{v}{2}$, the stopping potential is $\frac{v_{0}}{4}$. The threshold frequency for photoelectric, emission is

1 $\frac{v}{6}$
2 $\frac{v}{3}$
3 $\frac{2 v}{3}$
4 $\frac{4 v}{3}$
WB JEE 2012
Dual nature of radiation and Matter

142127 If separation between screen and source is increased by $2 \%$ what would be the effect on the intensity?

1 Increased by $4 \%$
2 Increased by $2 \%$
3 Decreased by $2 \%$
4 Decreased by $4 \%$
UP CPMT-2003
NEET DIGITAL LIBRARY
Dual nature of radiation and Matter

142118 Light of wavelength $0.6 \mu \mathrm{m}$ from a sodium lamp falls on a photocell and causes the emission of photoelectrons for which the stopping potential is $0.5 \mathrm{~V}$. With light of wavelength $0.4 \mu \mathrm{m}$ from a sodium lamp, the stopping potential is $1.5 \mathrm{~V}$. With this data, the value of $h / e$ is

1 $4 \times 10^{-59} \mathrm{~V} \mathrm{~s}$
2 $0.25 \times 10^{+55} \mathrm{~V} \mathrm{~s}$
3 $4 \times 10^{-15} \mathrm{~V} \mathrm{~s}$
4 $4 \times 10^{-8} \mathrm{~V} \mathrm{~s}$
J and K CET- 2000
Dual nature of radiation and Matter

142123 The work function of metals is in the range of 2 $\mathrm{eV}$ to $5 \mathrm{eV}$. Find which of the following wavelength of light cannot be used for photoelectric effect? (Consider, Plank constant $=4 \times 10^{-15} \mathrm{eVs}$, velocity of light $=3 \times 10^{8} \mathrm{~m} / \mathrm{s}$ )

1 $510 \mathrm{~nm}$
2 $650 \mathrm{~nm}$
3 $400 \mathrm{~nm}$
4 $570 \mathrm{~nm}$
WB JEE 2015
Dual nature of radiation and Matter

142124 When a certain metal surface is illuminated with light of frequency $v$, the stopping potential for photoelectric current is $V_{0}$. When the same surface is illuminated by light of frequency $\frac{v}{2}$, the stopping potential is $\frac{v_{0}}{4}$. The threshold frequency for photoelectric, emission is

1 $\frac{v}{6}$
2 $\frac{v}{3}$
3 $\frac{2 v}{3}$
4 $\frac{4 v}{3}$
WB JEE 2012
Dual nature of radiation and Matter

142127 If separation between screen and source is increased by $2 \%$ what would be the effect on the intensity?

1 Increased by $4 \%$
2 Increased by $2 \%$
3 Decreased by $2 \%$
4 Decreased by $4 \%$
UP CPMT-2003
Join With Us for More Updates