Which of the following are not electromagnetic waves? (1) Gamma rays (2) X-rays (3) Beta rays (4) Cosmic rays
Answer: (3) Beta rays. Electromagnetic waves are also known as EM waves that are formed when an electric field comes... View Article
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The maximum distance upto which TV transmission from a TV tower of height h can be received is proportional to
Distance covered by T.V. signals = √2hR => maximum distance ∝ h1/2
Which radiation in sunlight, causes heating effect
Solar radiation is radiant (electromagnetic) energy from the sun. It provides light and heat for the Earth and energy for... View Article
What is opened while clicking the camera?
Shutter is opened while clicking the camera. It is a device that allows light to pass for a determined period,... View Article
How can the distance of the lens from the film be changed?
The distance of the lens from the film can be changed using a Focussing ring. The camera lens has a... View Article
Choose the right answer from the following
A magnifying glass forms inverted image real image virtual image Both 1 and 2 Answer: Option 3 Explanation: A magnifying... View Article
Which among these is not a product of petroleum?
A) Diesel B) Ethanol C) Petrol D) Natural gas The correct option is D) Natural gas. Natural gas is defined... View Article
A magnifying glass consists of a
A magnifying glass uses a convex lens
The fluid between the retina and the lens is called?
Vitreous humour: The fluid between the retina and the lens. It is an absolutely transparent liquid. The liquid is made... View Article
Where is the largest wind energy farm in India?
The largest farm in India is Jaisalmer Wind Park located at Amarsagar in Jaisalmer district of Rajasthan. Its installed capacity of 1,064... View Article
Ability of the eye to see objects at all distances is called
Accommodation of an eye: While seeing at distant objects, eye lens become thinner and its focal length is more (about... View Article
Circular part in the centre of retina of human eye is called
Circular part in the centre of retina of human eye is called yellow spot.
The amount of light reaching the retina of the eye is controlled by
The amount of light reaching the retina of the eye is controlled by Pupil.
Human Eye Question
Which among these is not a part of the human eye? Cervix Retina Sclera Cornea Answer: 1.Cervix Cervix is not... View Article
An electric current flowing through a conductor produces
An electric current flowing through a conductor produces magnetic field in its surrounding region.
In a hydro-electric power plant:
Hydro-electric power plants converts the potential energy of stored water to kinetic energy of falling water which then aids to... View Article
Electromagnet works on
Electromagnet works on the principle of magnetic effect of electric current. It is formed when a strong magnetic field is... View Article
Which one is a non-renewable source of energy? (A) Solar energy (B) Biomass (C) Natural gas (D) Wind energy
Answer: (C) Natural gas. Renewable energy is also known as clean energy which is obtained from natural sources and can... View Article
What is the pressure exerted by a weight of 80 N on an area of 1.6 m2?
Solution: The pressure is given by the formula Pressure = Force/Area Substituting the value, we get P = F/A =... View Article
Which among the following is a wrong statement for liquid pressure?
Liquid exerts pressure on the sides of container in which it is placed.
