Photoelectric Effect
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357708 Radiation of wavelength \(6561\) \( \mathop A^{~~\circ} \) falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of \({3 \times 10^{-4} {~T}}\). If the radius of the largest circular path followed by the electrons is \(10\,mm,\) the work function of the metal is close to

1 \(1.8\,eV\)
2 \(1.1\,eV\)
3 \(0.8\,eV\)
4 \(1.6\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357709 A photon of energy \(E\) ejects a photoelectron from a metal surface whose work function is \(W_{0}\). If this electron enters into a uniform magnetic field of induction \(B\) in a direction perpendicular to the field and describes a circular path of radius \(r\), then the radius \(r\) is given by

1 \(\frac{{\sqrt {2e\left( {E - {W_0}} \right)} }}{{mB}}\)
2 \(\frac{{\sqrt {2e\left( {{W_0} - E} \right)} }}{{eB}}\)
3 \(\sqrt{\dfrac{2 m W_{0}}{e B}}\)
4 \(\dfrac{\sqrt{2 m\left(E-W_{0}\right)}}{e B}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357710 \(U V\) light of \(4.13\,eV\) is incident on a photosensitive metal surface having work function \(3.13\,eV.\) The maximum kinetic energy of ejected photoelectrons will be

1 \(4.13\,eV\)
2 \(1\,eV\)
3 \(3.13\,eV\)
4 \(7.26\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357711 The stopping potential \(V_{s}\) for photoelectric emission from a metal surface is plotted along \(Y\)-axis and frequency \(v\) of incident light along \(X\)-axis. A straight line is obtained as shown. Planck's constant is given by
supporting img

1 Slope of the line
2 Product of slope on the line and charge on the electron
3 Product of intercept along \(Y\)-axis and mass of the electron
4 Product of slope and mass of electron
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357712 The threshold frequency for a certain photosensitive metal is \({\nu _0}\). When it is illuminated by light of frequency \(2{\nu _0}\), the maximum velocity of photoelectrons is \({v_0}\). What will be the maximum velocity of the electrons when the same metal is illuminated by light of frequency \(5{\nu _0}\)

1 \(\sqrt{2} V_{0}\)
2 \(2 V_{0}\)
3 \(2 \sqrt{2} V_{0}\)
4 \(4 V_{0}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357708 Radiation of wavelength \(6561\) \( \mathop A^{~~\circ} \) falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of \({3 \times 10^{-4} {~T}}\). If the radius of the largest circular path followed by the electrons is \(10\,mm,\) the work function of the metal is close to

1 \(1.8\,eV\)
2 \(1.1\,eV\)
3 \(0.8\,eV\)
4 \(1.6\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357709 A photon of energy \(E\) ejects a photoelectron from a metal surface whose work function is \(W_{0}\). If this electron enters into a uniform magnetic field of induction \(B\) in a direction perpendicular to the field and describes a circular path of radius \(r\), then the radius \(r\) is given by

1 \(\frac{{\sqrt {2e\left( {E - {W_0}} \right)} }}{{mB}}\)
2 \(\frac{{\sqrt {2e\left( {{W_0} - E} \right)} }}{{eB}}\)
3 \(\sqrt{\dfrac{2 m W_{0}}{e B}}\)
4 \(\dfrac{\sqrt{2 m\left(E-W_{0}\right)}}{e B}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357710 \(U V\) light of \(4.13\,eV\) is incident on a photosensitive metal surface having work function \(3.13\,eV.\) The maximum kinetic energy of ejected photoelectrons will be

1 \(4.13\,eV\)
2 \(1\,eV\)
3 \(3.13\,eV\)
4 \(7.26\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357711 The stopping potential \(V_{s}\) for photoelectric emission from a metal surface is plotted along \(Y\)-axis and frequency \(v\) of incident light along \(X\)-axis. A straight line is obtained as shown. Planck's constant is given by
supporting img

1 Slope of the line
2 Product of slope on the line and charge on the electron
3 Product of intercept along \(Y\)-axis and mass of the electron
4 Product of slope and mass of electron
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357712 The threshold frequency for a certain photosensitive metal is \({\nu _0}\). When it is illuminated by light of frequency \(2{\nu _0}\), the maximum velocity of photoelectrons is \({v_0}\). What will be the maximum velocity of the electrons when the same metal is illuminated by light of frequency \(5{\nu _0}\)

1 \(\sqrt{2} V_{0}\)
2 \(2 V_{0}\)
3 \(2 \sqrt{2} V_{0}\)
4 \(4 V_{0}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357708 Radiation of wavelength \(6561\) \( \mathop A^{~~\circ} \) falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of \({3 \times 10^{-4} {~T}}\). If the radius of the largest circular path followed by the electrons is \(10\,mm,\) the work function of the metal is close to

1 \(1.8\,eV\)
2 \(1.1\,eV\)
3 \(0.8\,eV\)
4 \(1.6\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357709 A photon of energy \(E\) ejects a photoelectron from a metal surface whose work function is \(W_{0}\). If this electron enters into a uniform magnetic field of induction \(B\) in a direction perpendicular to the field and describes a circular path of radius \(r\), then the radius \(r\) is given by

1 \(\frac{{\sqrt {2e\left( {E - {W_0}} \right)} }}{{mB}}\)
2 \(\frac{{\sqrt {2e\left( {{W_0} - E} \right)} }}{{eB}}\)
3 \(\sqrt{\dfrac{2 m W_{0}}{e B}}\)
4 \(\dfrac{\sqrt{2 m\left(E-W_{0}\right)}}{e B}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357710 \(U V\) light of \(4.13\,eV\) is incident on a photosensitive metal surface having work function \(3.13\,eV.\) The maximum kinetic energy of ejected photoelectrons will be

1 \(4.13\,eV\)
2 \(1\,eV\)
3 \(3.13\,eV\)
4 \(7.26\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357711 The stopping potential \(V_{s}\) for photoelectric emission from a metal surface is plotted along \(Y\)-axis and frequency \(v\) of incident light along \(X\)-axis. A straight line is obtained as shown. Planck's constant is given by
supporting img

1 Slope of the line
2 Product of slope on the line and charge on the electron
3 Product of intercept along \(Y\)-axis and mass of the electron
4 Product of slope and mass of electron
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357712 The threshold frequency for a certain photosensitive metal is \({\nu _0}\). When it is illuminated by light of frequency \(2{\nu _0}\), the maximum velocity of photoelectrons is \({v_0}\). What will be the maximum velocity of the electrons when the same metal is illuminated by light of frequency \(5{\nu _0}\)

1 \(\sqrt{2} V_{0}\)
2 \(2 V_{0}\)
3 \(2 \sqrt{2} V_{0}\)
4 \(4 V_{0}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357708 Radiation of wavelength \(6561\) \( \mathop A^{~~\circ} \) falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of \({3 \times 10^{-4} {~T}}\). If the radius of the largest circular path followed by the electrons is \(10\,mm,\) the work function of the metal is close to

1 \(1.8\,eV\)
2 \(1.1\,eV\)
3 \(0.8\,eV\)
4 \(1.6\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357709 A photon of energy \(E\) ejects a photoelectron from a metal surface whose work function is \(W_{0}\). If this electron enters into a uniform magnetic field of induction \(B\) in a direction perpendicular to the field and describes a circular path of radius \(r\), then the radius \(r\) is given by

1 \(\frac{{\sqrt {2e\left( {E - {W_0}} \right)} }}{{mB}}\)
2 \(\frac{{\sqrt {2e\left( {{W_0} - E} \right)} }}{{eB}}\)
3 \(\sqrt{\dfrac{2 m W_{0}}{e B}}\)
4 \(\dfrac{\sqrt{2 m\left(E-W_{0}\right)}}{e B}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357710 \(U V\) light of \(4.13\,eV\) is incident on a photosensitive metal surface having work function \(3.13\,eV.\) The maximum kinetic energy of ejected photoelectrons will be

1 \(4.13\,eV\)
2 \(1\,eV\)
3 \(3.13\,eV\)
4 \(7.26\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357711 The stopping potential \(V_{s}\) for photoelectric emission from a metal surface is plotted along \(Y\)-axis and frequency \(v\) of incident light along \(X\)-axis. A straight line is obtained as shown. Planck's constant is given by
supporting img

1 Slope of the line
2 Product of slope on the line and charge on the electron
3 Product of intercept along \(Y\)-axis and mass of the electron
4 Product of slope and mass of electron
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357712 The threshold frequency for a certain photosensitive metal is \({\nu _0}\). When it is illuminated by light of frequency \(2{\nu _0}\), the maximum velocity of photoelectrons is \({v_0}\). What will be the maximum velocity of the electrons when the same metal is illuminated by light of frequency \(5{\nu _0}\)

1 \(\sqrt{2} V_{0}\)
2 \(2 V_{0}\)
3 \(2 \sqrt{2} V_{0}\)
4 \(4 V_{0}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357708 Radiation of wavelength \(6561\) \( \mathop A^{~~\circ} \) falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of \({3 \times 10^{-4} {~T}}\). If the radius of the largest circular path followed by the electrons is \(10\,mm,\) the work function of the metal is close to

1 \(1.8\,eV\)
2 \(1.1\,eV\)
3 \(0.8\,eV\)
4 \(1.6\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357709 A photon of energy \(E\) ejects a photoelectron from a metal surface whose work function is \(W_{0}\). If this electron enters into a uniform magnetic field of induction \(B\) in a direction perpendicular to the field and describes a circular path of radius \(r\), then the radius \(r\) is given by

1 \(\frac{{\sqrt {2e\left( {E - {W_0}} \right)} }}{{mB}}\)
2 \(\frac{{\sqrt {2e\left( {{W_0} - E} \right)} }}{{eB}}\)
3 \(\sqrt{\dfrac{2 m W_{0}}{e B}}\)
4 \(\dfrac{\sqrt{2 m\left(E-W_{0}\right)}}{e B}\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357710 \(U V\) light of \(4.13\,eV\) is incident on a photosensitive metal surface having work function \(3.13\,eV.\) The maximum kinetic energy of ejected photoelectrons will be

1 \(4.13\,eV\)
2 \(1\,eV\)
3 \(3.13\,eV\)
4 \(7.26\,eV\)
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357711 The stopping potential \(V_{s}\) for photoelectric emission from a metal surface is plotted along \(Y\)-axis and frequency \(v\) of incident light along \(X\)-axis. A straight line is obtained as shown. Planck's constant is given by
supporting img

1 Slope of the line
2 Product of slope on the line and charge on the electron
3 Product of intercept along \(Y\)-axis and mass of the electron
4 Product of slope and mass of electron
PHXII11:DUAL NATURE OF RADIATION AND MATTER

357712 The threshold frequency for a certain photosensitive metal is \({\nu _0}\). When it is illuminated by light of frequency \(2{\nu _0}\), the maximum velocity of photoelectrons is \({v_0}\). What will be the maximum velocity of the electrons when the same metal is illuminated by light of frequency \(5{\nu _0}\)

1 \(\sqrt{2} V_{0}\)
2 \(2 V_{0}\)
3 \(2 \sqrt{2} V_{0}\)
4 \(4 V_{0}\)