MCQ
Direction of induced emf is determined by:
- AAmpere's law
- BFleming's left hand rule
- CFleming's right hand rule
- ✓Lenz's law
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$(A)$ If $f$ is increased keeping $I$ and work function constant then maximum kinetic energy of photoelectron increases
$(B)$ If distance between cathode and anode is increased stopping potential increases
$(C)$ If $I$ is increased keeping $f$ and work function constant then stopping potential remains same and saturation current increases
$(D)$ Work function is decreased keeping $f$ and $I$ constant then stopping potential increases