MCQ
Choose the wrong statement:
- AAlpha particles can be scattered by Gold nucleus
- BX-ray can be diffracted by crystals
- CUV radiation can cause Photoelectric effect
- DElectrons cannot be diffracted by crystals
Explanation:
Fast moving electrons are associated with wave and hence they show diffraction.
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In photoelectric effect if the intensity of light is doubled then maximum kinetic energy of photoelectrons will become
|
(a) Double |
(b) Half |
(c) Four time |
(d) No change |

In a full wave rectifiers, input ac current has a frequency ‘n’. The output frequency of current is
|
(a) n/2 |
(b) n |
(c) 2n |
(d) None of these |