A metallic surface with work function of 
, on heating to a temperature of 800 
gives an emission current of 
. If another metallic surface having the same surface area, same emission constant but work function 
is heated to a temperature of 
, then the emission current will be
a)
1 
b)
2 
c)
4 
d)
None of these
A metallic surface with work function of , on heating to a temperature of 800 gives an emission current of . If another metallic surface having the same surface area, same emission constant but work function is heated to a temperature of , then the emission current will be
a)
1
b)
2
c)
4
d)
None of these
Question ID - 151029 | SaraNextGen Top Answer
A metallic surface with work function of , on heating to a temperature of 800 gives an emission current of . If another metallic surface having the same surface area, same emission constant but work function is heated to a temperature of , then the emission current will be
a)
1
b)
2
c)
4
d)
None of these
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A metallic surface with work function of |
|||||||
|
a) |
1 |
b) |
2 |
c) |
4 |
d) |
None of these |
1 Answer
127 votes
Answer Key / Explanation : (c) -
|
(c) The emission current For the two surfaces
Therefore, |
127 votes
Answer Link
127