Whenever light travels from denser medium to a rarer medium:
- AIt bends away from the normal
- BIt bends towards the normal
- CIt passes undeviated
- DIt always reflects back
Whenever light travels from denser medium to a rarer medium:
Explanation:
Whenever light travels from a denser medium to a rarer medium, it bends away from the normal due to refraction.

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If two bulbs of wattage 25 and 100 respectively each rated at 220 volt are connected in series with the supply of 440 volt, then which bulbs will fuse
|
(a) 100 watt bulb |
(b) 25 watt bulb |
(c) None of them |
(d) Both of them |
Potential difference between the points P and Q in the electric circuit shown is

|
(a) 4.5 V |
(b) 1.2 V |
(c) 2.4 V |
(d) 2.88 V |
What is the current in the circuit shown below

| (a) 0 amp |
(b) |
(c) 1 amp |
(d) 0.10 amp |
Indicate which one of the following system is digital
|
(a) Pulse position modulation |
(b) Pulse code modulation |
|
(c) Pulse width modulation |
(d) Pulse amplitude modulation |
$\frac{1}{8}$
$\frac{1}{4}$
$4$
$8$
A coil has an area of 0.05 m2 and it has 800 turns. It is placed perpendicularly in a magnetic field of strength 4
, it is rotated through 90° in 0.1 sec. The average e.m.f. induced in the coil is
|
(a) 0.056 V |
(b) 0.046 V |
(c) 0.026 V |
(d) 0.016 V |
$\text{y}=\text{a}_1\sin\omega\text{t}$
$\text{y}=\text{a}_2\sin(\omega\text{t}+\in)$
$\text{y}=\text{a}_1\sin2\omega\text{t}$
$\text{y}=\text{a}_2\sin2(\omega\text{t}+\in)$
Interference fringes may be observed due to superposition of: