MCQ
The function of rectifier is :
- Ato amplify the current
- Bto amplify the voltage
- Cconverting direct current into alternating current
- ✓converting alternating current into direct current
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If the ionisation potential of helium atom is 24.6 volt, the energy required to ionise it will be
|
(a) 24.6 eV |
(b) 24.6 V |
(c) 13.6 V |
(d) 13.6 eV |
Electromagnetic radiation of highest frequency is
|
(a) Infrared radiations |
(b) Visible radiation |
(c) Radio waves |
(d) g-rays |
If six identical cells each having an e.m.f. of 6V are connected in parallel, the e.m.f. of the combination is
|
(a) 1 V |
(b) 36 V |
(c) |
(d) 6 V |