- AThe wavelength of the wave.
- BThe velocity of the wave.
- CThe amplitude of the wave.
- DThe propagation of the wave front.
Explanation:
Huygen's wave theory explain the propagation of the wave front.
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Shown below is a distribution of charges. The flux of electric field due to these charges through the surface S is
|
(a) 3q/ |
(b) 2q/ |
(c) q/ |
(d) Zero |
In a transformer, the number of turns in primary coil and secondary coil are 5 and 4 respectively. If 240 V is applied on the primary coil, then the ratio of current in primary and secondary coil is
|
(a) 4 : 5 |
(b) 5 : 4 |
(c) 5 : 9 |
(d) 9 : 5 |
A hot electric iron has a resistance of 80 Ω and is used on a 200 V source. The electrical energy spent, if it is used for two hours, will be
|
(a) 8000 Wh |
(b) 2000 Wh |
(c) 1000 Wh |
(d) 800 Wh |
The electric potential inside a conducting sphere
|
(a) Increases from centre to surface |
|
(b) Decreases from centre to surface |
|
(c) Remains constant from centre to surface |
|
(d) Is zero at every point inside |
In a biprism experiment, by using light of wavelength 5000 Å, 5 mm wide fringes are obtained on a screen 1.0 m away from the coherent sources. The separation between the two coherent sources is
|
(a) 1.0 mm |
(b) 0.1 mm |
(c) 0.05 mm |
(d) 0.01 mm |
A real image is formed by: