For a wave propagating in a medium, identify the property that is independent of the others.
Options
(a) Velocity (b) Wavelength (c) Frequency (d) All these depend on each other
Correct Answer:
Frequency
A stone thrown into still water, creates a circular wave pattern moving radially outwards. If r is the distance measured from the centre of the pattern, the amplitude of the wave varies as
Options […]
When you make ice cubes, the entropy of water
Options
(a) Does not change (b) Increases (c) Decreases (d) May either increase or decrease depending on the process used.
Correct Answer:
Decreases
Explanation: […]
The voltage of clouds is 4×10⁶ volt with respect to ground. In a lightening strike lasting 100 m sec, a charge of 4 coulombs is delivered to the ground. The power of the lightening strike […]
The operation of a nuclear reactor is said to be critical, if the multiplication factor(k) has a value
Options
(a) 1 (b) 1.5 (c) 2.1 (d) 2.5
Correct Answer:
1
Explanation:
No explanation […]
An amplifier has a voltage gain Av=1000. The voltage gain in dB is
Options
(a) 30 dB (b) 60 dB (c) 3 dB (d) 20 dB
Correct Answer:
60 dB
Explanation:
No explanation […]
In refraction, light waves are bent on passing from one medium to the second medium, because in the second medium
Options
(a) the frequency is different (b) coefficient of elasticity is different (c) […]
A boat of anchor is rocked by waves whose crests are 100 m apart and velocity is 25 m/s. The boat bounces up once in every
Options
(a) 2500 sec (b) 75 sec […]
A light emitting diode(LED) has a voltage drop of 2 volt across it and passes a current of 10 mA when it operates with a 6 volt battery through a limiting resistor R. The value […]
By sucking through a straw, a student can reduce the pressure of his lungs to 750 nm of Hg (density = 13.6 g/cm³). Using the straw, he can drink water from a glass upto a […]
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