New chat PYQ Library Doubts Rank report

Sign in to see Recents

Sign in to save progress →

Dual Nature of Radiation question

2016 · Shift 2 · Q50

Guest · try one question or challengeGuest · try one question or challenge

PYQ Library
JEE Advanced
Physics
Dual Nature of Radiation
2016 · Shift 2 · Q50

Dual Nature of Radiation question

2016 · Shift 2 · Q50

JEE AdvancedPhysicsDual Nature of RadiationMultiple correct+4 / −2

Light of wavelength

\lambda

ph falls on a cathode plate inside a vacuum tube as shown in the figure. The work function of the cathode surface is

\phi

and the anode is a wire mesh of conducting material kept at a distance d from the cathode. A potential difference V is maintained between the electrodes. If the minimum de-Broglie wavelength of the electrons passing through the anode is

\lambda

e, which of the following statement(s) is (are) true? JEE Advanced 2016 Paper 2 Offline Physics - Dual Nature of Radiation Question 22 English

JEE Advanced 2016 Paper 2 Offline Physics - Dual Nature of Radiation Question 22 English

A
$\lambda$ e increases at the same rate as $\lambda$ ph for $\lambda$ ph < hc/ $\phi$
B
$\lambda$ e is approximately halved, if d is doubled
C
$\lambda$ e decreases with increase in $\phi$ and $\lambda$ ph
D
For large potential difference (V >> $\phi$ /e), $\lambda$ e is approximately halved if V is made four times

More from Dual Nature of Radiation

For photo-electric effect with incident photon wavelength $λ$ , the stopping potential is V0. Identify the correct variation(s) of V0 with $λ$ and $\frac{1}{λ}$ .2015 · Multiple correct
An electron in an excited state of Li2+ ion has angular momentum $\frac{3 h}{2 π}$ . The de Broglie wavelength of the electron in this state is p $π$ a0 (where a0 is the Bohr radius). The value of p is2015 · Numerical
A metal surface is illuminated by light of two different wavelengths 248 nm and 310 nm. The maximum speeds of the photoelectrons corresponding to these wavelengths are u1 and u2, respectively. If the ratio u1 : u2 = 2 : 1 and hc = 1240 eV…2014 · MCQ
The work functions of silver and sodium are 4.6 and 2.3 eV, respectively. The ratio of the slope of the stopping potential versus frequency plot for silver to that of sodium is .2013 · Numerical
Using the expression $2 d sin θ = λ$ , one calculates the values of d by measuring the corresponding angles $θ$ in the range 0 to 90o. The wavelength $λ$ is exactly known and the error in $θ$ is constant for all…2013 · Multiple correct
A proton is fired from very far away towards a nucleus with charge Q = 120e, where e is the electronic charge. It makes a closest approach of 10 fm to the nucleus. The de Broglie wavelength (in units of fm) of the proton at its start is …2012 · Numerical
The activity of a freshly prepared radioactive sample is 1010 disintegrations per second, whose mean life is 109 s. The mass of an atom of this radioisotope is 10 $-$ 25 kg. The mass (in mg) of the radioactive sample is …2011 · Numerical
A silver sphere of radius 1 cm and work function 4.7 eV is suspended from an insulating thread in free-space. It is under continuous illumination of 200 nm wavelength light. As photoelectrons are emitted, the sphere gets charged and…2011 · Numerical