The ratio of work functions and temperatures of two emitters are 1 : 2, then the ratio of current densities obtained by them will be |
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a) |
4:1 |
b) |
2:1 |
c) |
1:2 |
d) |
1:4 |

The ratio of work functions and temperatures of two emitters are 1 : 2, then the ratio of current densities obtained by them will be |
|||||||

a) |
4:1 |
b) |
2:1 |
c) |
1:2 |
d) |
1:4 |

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