A diode is used as a ________.
A.Rectifier
B.Amplifier
C.Magnifier
D.Purifier
A
This is a factual question on Physics and is answered from standard reference knowledge.
On the basis of the established fact in this area, the matching option is: Rectifier.
Hence, the correct answer is Rectifier.
________ is not a type of heat exchanger flow.
What is the ratio of the speed of light in vacuum to that in a medium called?
Why does a piece of cloth, which appears green in sunlight, appear black when it is viewed under red light?
AC is converted into DC by a
Knife is an example for
A train travelling at 20 m/s slows down uniformly. If it takes 10 seconds to stop, find the rate of change of its velocity.
How does a blotting paper absorb ink?
A.By drying the ink
B.By capillary action
C.By solidification
D.By evaporation
Water pipes burst at freezing temperature. This happens due to ________.
A.Expansion
B.Contraction
C.Humidification
D.Precipitation
Which colour has the shortest wavelength?
A.Red
B.Orange
C.Blue
D.Violet
Swiping a credit card is based on the principle of _________.
What is the colour of the light emitted by the Sun?
Lightning occur in the sky when two clouds:
With reference to street-lighting, how do sodium lamps differ from LED lamps?
1. Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps.
2. As street lights, sodium lamps have a longer life span than LED lamps.
3. The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant colour advantages in street lighting.
Select the correct answer using the code given below.
In a pressure cooker, the temperature at which the food is cooked depends mainly upon which of the following?
1. Area of the hole in the lid
2. Temperature of the flame
3. Weight of the lid
Select the correct answer using the code given below.
The famous phenomenon 'Raman Effect' discovered by Nobel laureate CV Raman is related to which field of physics?