Electrons ejected from the surface of a metal | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) Einstein's photoelectric equation is given by:$h 
u = h 
u_0 + K_{max}$Since the stopping potential $V_0 = 3 \ V$,the maximum kinetic energy $K_

Vedclass · Accepted Answer

$13.5 	imes 10^{14}$

Vedclass · Answer

(C) Einstein's photoelectric equation is given by:$h 
u = h 
u_0 + K_{max}$Since the stopping potential $V_0 = 3 \ V$,the maximum kinetic energy $K_{max} = e V_0 = 1.6 	imes 10^{-19} 	imes 3 \ J$.The threshold frequency $
u_0 = 6 	imes 10^{14} \ s^{-1}$.Substituting these into the equation:$h 
u = h 
u_0 + e V_0$$
u = 
u_0 + \frac{e V_0}{h}$$
u = 6 	imes 10^{14} + \frac{1.6 	imes 10^{-19} 	imes 3}{6.4 	imes 10^{-34}}$$
u = 6 	imes 10^{14} + \frac{4.8 	imes 10^{-19}}{6.4 	imes 10^{-34}}$$
u = 6 	imes 10^{14} + 0.75 	imes 10^{15}$$
u = 6 	imes 10^{14} + 7.5 	imes 10^{14} = 13.5 	imes 10^{14} \ s^{-1}$.

Similar Questions

The products formed when heavy water is reacted with magnesium nitride are:

The angle between the pair of straight lines formed by joining the points of intersection of $x^2+y^2=4$ and $y=3x+c$ to the origin is a right angle. Then $c^2$ is equal to

Verdigris is

Observe the following reaction: $2A + B \longrightarrow C$. The rate of formation of $C$ is $2.2 \times 10^{-3} \ mol \ L^{-1} \ min^{-1}$. What is the value of $-\frac{d[A]}{dt}$ (in $mol \ L^{-1} \ min^{-1}$)?

The number of angular and radial nodes of $4d$ orbital respectively are

Vedclass Test Series

Exam Paper Generator

Online Exam Module