MCQ
Unit of reactance is :
- ✓ohm
- Btesla
- Chenry
- Dfarad
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The graph between the instantaneous concentration (N) of a radioactive element and time (t) is
|
(a) |
(b) |
(c) |
(d) |
Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?
A light has amplitude A and angle between analyser and polariser is 60°. Light is reflected by analyser has amplitude
|
(a) A |
(b) A/ |
(c) |
(d) A/2 |
If two light waves having same frequency have intensity ratio 4 : 1 and they interfere, the ratio of maximum to minimum intensity in the pattern will be
|
(a) 9 : 1 |
(b) 3 : 1 |
(c) 25 : 9 |
(d) 16 : 25 |