MCQ
When a negatively charged conductor is connected to earth
- AElectrons flow from the earth to the conducto
- BProtons flow from the conductor to the earth
- CNo charge flow occurs
- DElectrons flow from the conductor to the earth

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A long copper tube of inner radius R carries a current i. The magnetic field B inside the tube is
|
(a) |
(b) |
(c) |
(d) Zero |
$\text{n}_\text{p}\neq\text{n}_\text{e}$
Infrared radiation was discovered in 1800 by
|
(a) William Wollaston |
(b) William Herschel |
(c) Wilhelm Roentgen |
(d) Thomas Young |