Question
Cathode rays are
|
(a) Positive rays |
(b) Neutral rays |
(c) He rays |
(d) Electron waves |
✓
Answer
(d) Electron waves
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Refer to figure. Let $\Delta\text{U}_1$ and $\Delta\text{U}_2$ be the change in internal energy in processes A and B respectively, $\Delta\text{Q}$ be the net heat given to the system in process A + B and $\Delta \text{W}$ be the net work done by the system in the process A + B.
→- $\Delta\text{U}_1+\Delta\text{U}_2=0$
- $\Delta\text{U}_1-\Delta\text{U}_2=0$
- $\Delta\text{Q}-\Delta\text{W}=0$
- $\Delta\text{Q}+\Delta\text{W}=0$
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(a) |
(b) |
(c) |
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|
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|
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