Join now for JEE/NEET and also prepare for Boards Join now for JEE/NEET and also prepare for Boards. Register Now
Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-1023-196
+91-120-4616500
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
A light source of frequency 6 × 10^15 Hz is subjected to a metal sheet having work function equal to 22.6 eV . Then , the velocity of photo-electrons emitted having maximum kinetic energy will be. 1) 4.43 * 10^5 m/s 2) 3.21 * 10^7 m/s 3) 8.89 * 10^5 m/s 4) 8.73 * 10^6 m/s A light source of frequency 6 × 10^15 Hz is subjected to a metal sheet having work function equal to 22.6 eV . Then , the velocity of photo-electrons emitted having maximum kinetic energy will be. 1) 4.43 * 10^5 m/s2) 3.21 * 10^7 m/s3) 8.89 * 10^5 m/s4) 8.73 * 10^6 m/s
hv= 6.626×6x10-¹²x10-⁴x10-³= 39.756x10^-19 ~ 39.76 x 10^-19 hv°= 22.6×1.6x10^-19= 36.16x 10^-19 hv=hv°+1/2mv²1/2mv²= hv-hv° = 3.6 x10^-199.1x10^-31 x v² = 7.2 x 10^-19v² = (7.2/9.1)x 10¹²v = 0.889 x 10^6 = 8.89 x 10^5 Hence 3)
Dear , Preparing for entrance exams? Register yourself for the free demo class from askiitians.
points won -