MCQ
Nickel is :
- Adiamagnetic
- Bparamagnetic
- ✓ferromagnetic
- DNon of these
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and
ions are projected on the photographic plate with same velocity in a mass spectrograph. Which one will strike farthest
|
(a) |
(b) |
(c) |
(d) |
X-rays are
| (a) Stream of electrons |
| (b) Stream of positively charged particles |
| (c) Electromagnetic radiations of high frequency |
| (d) Stream of uncharged particles |
The radius of curvature of the curved surface of a plano-convex lens is 20cm. If the refractive index of the material of the lens be 1.5, it will.
An electric bulb marked 40 W and 200 V, is used in a circuit of supply voltage 100 V. Now its power is
|
(a) 100W |
(b) 40W |
(c) 20W |
(d) 10W |