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The Neutron was Discovered By?

James Chadwick discovered the neutron. In the year 1932, James Chadwick discovered that the core also contained an uncharged particle which is... View Article

A rubber band tied between 2 ends is stretched and then left, a sound is heard due to :

Sound is produced when a body vibrates, So here the rubber band vibrates and due to this to and fro motion of the band we hear sound.... View Article

Who owns the forest lands?

In India, the forest lands are owned by the Government. In India, much of its wildlife resources and forests are either managed or owned by the... View Article

You are using a tester with a light bulb to conduct an experiment to find out if a liquid is a conductor of electricity. But you observe that one of the liquids which is supposed to be a conductor according to your textbook is not causing the light bulb to glow, even though you have checked that all the connections are fine, and the battery and bulb are in working condition. What could be the possible reason for this?

The filament of an electric bulb glows because of the heating effect of electric current. As the current passes through the bulb it heats the... View Article

The filament of a bulb glows due to

The filament of an electric bulb glows because of the heating effect of electric current. As the current passes through the bulb it heats the... View Article

Two inflated balloons are rubbed with a woollen cloth and are brought close to each other. If they repel each other it means that the nature of charge on one balloon is different form the other.

If the two balloons repel each other, it means that they have acquired same kind of charge as we know that similar charges attract each other.... View Article

The objects which allow electric current to flow through them easily are known as

The objects which allow electric currents to flow through them are known as good conductors of electricity.... View Article

When a plastic refill is rubbed with polythene, which object acquires a electric charge?

When a plastic refill is rubbed with polythene both plastic refill and polythene acquire an electric charge. The process here by charging of... View Article

What kind of energy possessed by a running athlete?

A running athlete possessed kinetic energy. ... View Article

Which of the following object can produce electric current in a conductor?

All the above mentioned objects can produce an electric current. The ear phone connected to the cell phone works only when current flows through... View Article

Rahul has started a new shop where he sells food packed in iron containers. But he is receiving a lot of complaints about the spoilage of food. He tells his friend Rohit, who is a chemical engineer, about this problem. Rohit suggests him to use tin coated iron instead. What could be the reason for this?

Tin cans, used for storing food, are made by electroplating tin onto iron. Tin is less reactive than iron. Thus, food does not come into direct... View Article

Fingerprints Detection by Sprinkling Fluorescent Powder

A) Sunlight B) Dark light C) Infrared light D) Ultraviolet light The correct option is D) Ultraviolet light. Using ultraviolet light for the... View Article

A body has an initial velocity of 4 m/s and acceleration of 4 m/s2, then what is its final velocity after travelling 2m?

Given U = 4 m/s a = 4 m/s2 s= 2m Find out We have to determine the final velocity Solution According to equation of motion V2 = u2 + 2as... View Article

Thethree resistance of equal value are arranged in the different combinations shown below. Arrange them in increasing order of power dissipation[IIT-JEE (Screening) 2003]

Power dissipated ∝ Requivalent... View Article

Management of natural resources mainly deals with pollution control in the usage of resources.

Management of Natural Resources mainly deals with environmental conservation and sustainable use of resources.... View Article

Rohan wants to coat his magic stick made of carbon with copper. He takes a battery, a container filled half with copper sulphate solution, a copper plate and his magic stick. But he is confused about which terminal of battery to connect to copper plate and which terminal to his magic stick. What should he do?

The copper from solution deposits to the electrode connected to negative terminal of battery. So, he will connect the carbon stick to negative... View Article

Sparks due to lightning have same phenomenon as that of the sparks observed when one take off woolen clothes.

Lightning and the spark from the clothes are essentially the same phenomena.... View Article

A set up consisting of a bulb, salt solution and a magnetic compass is arranged in such a manner that bulb and salt solution come in between the electric wires connected to the cell and hence complete the circuit. The magnetic compass is wrapped with the connecting wires. When switched on, current flows through salt solution, the bulb glows and the needle deflects. Which of the following effects of current is involved in this?

When switched on, current flows through the circuit. The bulb glows due to the heating effect; it produces chemical effect when it flows through... View Article

A cylindrical bar magnet is keptalong the axis of a circular coil. If the magnet is rotated about its axis, then [CPMT 1983; BCECE 2004]

Because there is no change in flux linked with coil... View Article

A substance which is a great insulator will not conduct electric current under:

A great insulator will not conduct electricity under most conditions. But, if you push REALLY hard, the electrons can flow even through a very... View Article

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