Full Version: Riddle # 250----->solved
A light of wavelenghth 5000 A is incident on a metal whose work function is 2eV.The maximum K.E of the photoelectron will be????
The photoelectric effect equation of interest:
hf=KEmax + work function
h=Plank's contant
f = frequency = c/wavelength
1) find f (wavelength = 5000 E-10m)
2) multiply by 6.626 E-34 Js
3) convert to eV (1.602 E-19J=1eV)
4) solve for KE max (in eV)
hf=KEmax + work function
h=Plank's contant
f = frequency = c/wavelength
1) find f (wavelength = 5000 E-10m)
2) multiply by 6.626 E-34 Js
3) convert to eV (1.602 E-19J=1eV)
4) solve for KE max (in eV)
QUOTE(*Life* @ Jul 1 2008, 04:55 AM) 
The photoelectric effect equation of interest:
hf=KEmax + work function
h=Plank's contant
f = frequency = c/wavelength
1) find f (wavelength = 5000 E-10m)
2) multiply by 6.626 E-34 Js
3) convert to eV (1.602 E-19J=1eV)
4) solve for KE max (in eV)
hf=KEmax + work function
h=Plank's contant
f = frequency = c/wavelength
1) find f (wavelength = 5000 E-10m)
2) multiply by 6.626 E-34 Js
3) convert to eV (1.602 E-19J=1eV)
4) solve for KE max (in eV)
QUOTE(*Life* @ Jul 1 2008, 04:55 AM)
The photoelectric effect equation of interest:
hf=KEmax + work function
h=Plank's contant
f = frequency = c/wavelength
1) find f (wavelength = 5000 E-10m)
2) multiply by 6.626 E-34 Js
3) convert to eV (1.602 E-19J=1eV)
4) solve for KE max (in eV)
hf=KEmax + work function
h=Plank's contant
f = frequency = c/wavelength
1) find f (wavelength = 5000 E-10m)
2) multiply by 6.626 E-34 Js
3) convert to eV (1.602 E-19J=1eV)
4) solve for KE max (in eV)
yah kia formula manga tha ya photoelectriccell ki defination??
QUOTE(*Life* @ Jul 1 2008, 12:55 AM)
The photoelectric effect equation of interest:
hf=KEmax + work function
h=Plank's contant
f = frequency = c/wavelength
1) find f (wavelength = 5000 E-10m)
2) multiply by 6.626 E-34 Js
3) convert to eV (1.602 E-19J=1eV)
4) solve for KE max (in eV)
hf=KEmax + work function
h=Plank's contant
f = frequency = c/wavelength
1) find f (wavelength = 5000 E-10m)
2) multiply by 6.626 E-34 Js
3) convert to eV (1.602 E-19J=1eV)
4) solve for KE max (in eV)
bas yahi problem hay.... google kar k yahoo answers main itnaa hi likha hoaa thaa....
QUOTE(tihami @ Jul 1 2008, 08:56 AM)
bas yahi problem hay.... google kar k yahoo answers main itnaa hi likha hoaa thaa....
waisey pure physics problems ko riddles kon kahta hey,,,,,,,,,, general type mathematical question ka tu theek hey,,,, jo zahan main hi solve ho jatey hain,,,, magar aisi problems jis main calculator bhi must ho,,, aur intehai specific subject se related ho,,,, tu issey riddle nahin kaha ja sakta
agar abhi Dr. sahab na koi apni kissi case history se koi sawal pooch liya,,,, tu phir yahan pe koi bhi nazar nahin aye ga
QUOTE(tihami @ Jul 1 2008, 11:56 AM)
bas yahi problem hay.... google kar k yahoo answers main itnaa hi likha hoaa thaa....
Q bi goole search hee hoty hai i hvt seen any Q made my person all r from net aor whn i saw diz Q was chting with 1 of ma frd ...solved by frd i just add here i thought if this wud be ok then i ll tell i ddint solve diz solve by my frd and if wrong anyother person ll solve
and who hv time 4 google searching
QUOTE(MJB @ Jul 1 2008, 08:13 PM)
waisey pure physics problems ko riddles kon kahta hey,,,,,,,,,, general type mathematical question ka tu theek hey,,,, jo zahan main hi solve ho jatey hain,,,, magar aisi problems jis main calculator bhi must ho,,, aur intehai specific subject se related ho,,,, tu issey riddle nahin kaha ja sakta
agar abhi Dr. sahab na koi apni kissi case history se koi sawal pooch liya,,,, tu phir yahan pe koi bhi nazar nahin aye ga
riddles main all kinda Q can comes
riddle is riddle can ask about anythink
QUOTE(*Life* @ Jul 1 2008, 05:28 PM)
riddles main all kinda Q can comes
riddle is riddle can ask about anythink
riddle is riddle can ask about anythink
phir main b koch pocho???
QUOTE(MJB @ Jul 1 2008, 05:13 PM)
waisey pure physics problems ko riddles kon kahta hey,,,,,,,,,, general type mathematical question ka tu theek hey,,,, jo zahan main hi solve ho jatey hain,,,, magar aisi problems jis main calculator bhi must ho,,, aur intehai specific subject se related ho,,,, tu issey riddle nahin kaha ja sakta
agar abhi Dr. sahab na koi apni kissi case history se koi sawal pooch liya,,,, tu phir yahan pe koi bhi nazar nahin aye ga
waise baat apki sahi hai
ye hisab kitaab ki batain mujhy wasy hi samajh nhi aatin
QUOTE(ziddi @ Jul 1 2008, 08:37 PM)
phir main b koch pocho???
yesh ...
QUOTE(MJB @ Jul 1 2008, 08:13 PM)
waisey pure physics problems ko riddles kon kahta hey,,,,,,,,,, general type mathematical question ka tu theek hey,,,, jo zahan main hi solve ho jatey hain,,,, magar aisi problems jis main calculator bhi must ho,,, aur intehai specific subject se related ho,,,, tu issey riddle nahin kaha ja sakta
agar abhi Dr. sahab na koi apni kissi case history se koi sawal pooch liya,,,, tu phir yahan pe koi bhi nazar nahin aye ga
lolz..i can solve the riddle of doc sahib
QUOTE(*Life* @ Jul 1 2008, 08:28 PM)
riddles main all kinda Q can comes
riddle is riddle can ask about anythink
riddle is riddle can ask about anythink
u r right life
QUOTE(*Life* @ Jul 1 2008, 08:26 PM)
Q bi goole search hee hoty hai i hvt seen any Q made my person all r from net aor whn i saw diz Q was chting with 1 of ma frd ...solved by frd i just add here i thought if this wud be ok then i ll tell i ddint solve diz solve by my frd and if wrong anyother person ll solve
and who hv time 4 google searching
dats wrong life y r u using google search??
wasya ainda say mein u ki riddles google search say hi find ki try
QUOTE(Cupid Princess @ Jul 2 2008, 11:44 AM)
dats wrong life y r u using google search??
wasya ainda say mein u ki riddles google search say hi find ki try
wasya ainda say mein u ki riddles google search say hi find ki try
very sad ,,and wats is wrong u saw my lines i said who hv time for google seaching ,,,,,,,,,,,, i don;t hv time for google searching too and why should i which happend i told already but its not measn u guyssssssssss can say anythink which never happen
and i always gave easy Q just FOR fun
if u mind then sorry per i ddint do any wrong then why should i which i never did
hf-work function = K.E
wavelength = 5000 E-10
workfunction=2(1.6E-19)=3.2E-19
f=c/wavelength=3E8/5000E-10=6E14
by putting these values in first line equation
(6.625E-34)*(6E14)-3.2E-19=K.E
7.75E-20 =K.E
answer is 7.75E-20
wavelength = 5000 E-10
workfunction=2(1.6E-19)=3.2E-19
f=c/wavelength=3E8/5000E-10=6E14
by putting these values in first line equation
(6.625E-34)*(6E14)-3.2E-19=K.E
7.75E-20 =K.E
answer is 7.75E-20
QUOTE(*Life* @ Jul 2 2008, 08:31 PM)
very sad ,,and wats is wrong u saw my lines i said who hv time for google seaching ,,,,,,,,,,,, i don;t hv time for google searching too and why should i which happend i told already but its not measn u guyssssssssss can say anythink which never happen
and i always gave easy Q just FOR fun
if u mind then sorry per i ddint do any wrong then why should i which i never did
and i always gave easy Q just FOR fun
if u mind then sorry per i ddint do any wrong then why should i which i never did
nahi life am kidding too
donot be tlak it serious sis
QUOTE(tension_4u @ Jul 2 2008, 09:08 PM)
hf-work function = K.E
wavelength = 5000 E-10
workfunction=2(1.6E-19)=3.2E-19
f=c/wavelength=3E8/5000E-10=6E14
by putting these values in first line equation
(6.625E-34)*(6E14)-3.2E-19=K.E
7.75E-20 =K.E
answer is 7.75E-20
wavelength = 5000 E-10
workfunction=2(1.6E-19)=3.2E-19
f=c/wavelength=3E8/5000E-10=6E14
by putting these values in first line equation
(6.625E-34)*(6E14)-3.2E-19=K.E
7.75E-20 =K.E
answer is 7.75E-20
nooooooooooooooooooooooooooo
clear karein and just answer
QUOTE(Cupid Princess @ Jul 3 2008, 11:29 AM)
nahi life am kidding too
donot be tlak it serious sis
donot be tlak it serious sis
otey jee
QUOTE(*Life* @ Jul 3 2008, 12:44 PM)
otey jee
QUOTE(*Life* @ Jul 3 2008, 12:44 PM)
otey jeedat's good
QUOTE(Cupid Princess @ Jul 3 2008, 11:32 AM)
nooooooooooooooooooooooooooo
clear karein and just answer
clear karein and just answer
itn alamba kiya tha galat
QUOTE(tension_4u @ Jul 3 2008, 07:37 PM)
itn alamba kiya tha galat
uf rona nahi plzzzzzz
QUOTE
uf rona nahi plzzzzzz
mary khiyaal main to asy hi tha
wasy answer to is ka yahi ho ga but K.E negative nhi hoti
wasy itni lambi calculation k baad rona mara haq banta ha
QUOTE(Cupid Princess @ Jun 30 2008, 11:52 AM)
A light of wavelenghth 5000 A is incident on a metal whose work function is 2eV.The maximum K.E of the photoelectron will be????
E(eV)=1242/500=2.48 eV(KE)
max=hv-0=2.48-2
=0.48 eV
QUOTE(tension_4u @ Jul 6 2008, 02:02 PM)
mary khiyaal main to asy hi tha
wasy answer to is ka yahi ho ga but K.E negative nhi hoti
wasy itni lambi calculation k baad rona mara haq banta ha
wasy answer to is ka yahi ho ga but K.E negative nhi hoti
wasy itni lambi calculation k baad rona mara haq banta ha
hmmm sorry but rona nahi try next riddle
QUOTE(KnOwN_StRaNgEr @ Jul 7 2008, 09:58 AM)
E(eV)=1242/500=2.48 eV(KE)
max=hv-0=2.48-2
=0.48 eV
max=hv-0=2.48-2
=0.48 eV
yah bhi Known Stranger aaj kal kuch ziada mind nahi chalanay lag gey aap?aisay hi chalta raha to bus or koi solve nahi kar saqay ga just KS hoon gey yahan hum sub ais section say bhair
QUOTE(KnOwN_StRaNgEr @ Jul 7 2008, 09:58 AM)
E(eV)=1242/500=2.48 eV(KE)
max=hv-0=2.48-2
=0.48 eV
max=hv-0=2.48-2
=0.48 eV
yah bhi Known Stranger aaj kal kuch ziada mind nahi chalanay lag gey aap?aisay hi chalta raha to bus or koi solve nahi kar saqay ga just KS hoon gey yahan hum sub ais section say bhair
QUOTE(Cupid Princess @ Jul 7 2008, 11:26 AM)
yah bhi Known Stranger aaj kal kuch ziada mind nahi chalanay lag gey aap?aisay hi chalta raha to bus or koi solve nahi kar saqay ga just KS hoon gey yahan hum sub ais section say bhairmain pehlian dosron ko moqa deta hon
jab kisi se b na solve ho to phir try karta hon
QUOTE(KnOwN_StRaNgEr @ Jul 7 2008, 11:30 AM)
main pehlian dosron ko moqa deta hon jab kisi se b na solve ho to phir try karta hon
jab kisi se b na solve ho to phir try karta hon acha g haan g i 9 tusi great ho
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