- AProton.
- BNucleus.
- CNeutron.
- DElectrons.
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The resistance of an ideal ammeter is
|
(a) Infinite |
(b) Very high |
(c) Small |
(d) Zero |
Which of the following statements are true about the magnetic susceptibility of paramagnetic substance
|
(a) Value of |
|
(b) |
|
(c) |
|
(d) |
A coil having N turns is wound tightly in the form of a spiral with inner and outer radii a and b respectively. When a current I passes through the coil, the magnetic field at the centre is
|
(a) |
(b) |
(c) |
(d) |
When the length of a microscope tube increases, its magnifying power:
An X-ray tube is operated at 50 kV. The minimum wavelength produced is
| (a) 0.5 Å | (b) 0.75 Å | (c) 0.25 Å | (d) 1 Å |