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

What is obtained when sodium metal is heated in a stream of dry ammonia?

$A$ nichrome wire $50 \text{ cm}$ long and $1 \text{ mm}^2$ cross-section carries a current of $4 \text{ A}$ when connected to a $2 \text{ V}$ battery. The resistivity of the nichrome wire in $\Omega \cdot \text{m}$ is:

$\sec h^{-1}\left(\frac{1}{2}\right)-\operatorname{cosec} h^{-1}\left(\frac{3}{4}\right)$ is equal to

Which of the following is responsible for mechanical support, enzyme transport and protein synthesis?

The polar equation of the line perpendicular to the line $\sin \theta - \cos \theta = \frac{1}{r}$ and passing through the point $\left(2, \frac{\pi}{6}\right)$ is

Vedclass Test Series

Exam Paper Generator

Online Exam Module