- ALess elastic and more dense
- BHighly elastic and less dense
- CNot elastic
- DMuch heavier
Explanation:
Huygen considered, light needs a medium to propagate called ether which is highly elastic and less denser.
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Two identical bar magnets with a length 10 cm and weight 50 gm-weight are arranged freely with their like poles facing in a inverted vertical glass tube. The upper magnet hangs in the air above the lower one so that the distance between the nearest pole of the magnet is 3mm. Pole strength of the poles of each magnet will be
|
(a) 6.64 amp × m |
(b) 2 amp × m |
(c) 10.25 amp × m |
(d) None of these |

Zener breakdown takes place if
|
(a) Doped impurity is low |
(b) Doped impurity is high |
|
(c) Less impurity in N-part |
(d) Less impurity in P-type |
On an electric heater 220 volt and 1100 watt are marked. On using it for 4 hours, the energy consumed in kWh will be
|
(a) 2 |
(b) 4.4 |
(c) 6 |
(d) 8 |
