Image is formed for the short sighted personat [AFMC 1988]
In short sightedness, the focal length of eye lens decreases, so image is formed before retina.
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Statement 1: Poor conductors do not allow electric current to flow through them. Statement 2: Poor conductors do not allow electric current to flow through them easily.
Poor conductors do not allow electric current to flow through them easily, but under certain conditions they may conduct electricity.
Like sound light also cannot travel in vacuum.
Light can travel in vaccum but sound cannot.
There is a sample of water. However it is not known if it is pure distilled water or contains salts and other impurities. Can you determine if it will conduct electricity or not with just the given information?
Pure water is not a conductor of electricity. But the presence of salts, minerals etc makes it a conductor.
Why does the needle of a magnetic compass deflect when it is kept beside a current carrying wire?
A current carrying wire always produces a magnetic field around it and due to this magnetic field the needle of... View Article
Statement 1: It is observed that sometimes a bulb glows brighter and sometimes it glows dim. Statement 2: Glowing brighter and dimmer depends on heating effect of current. More current produces more heating effect making the bulb glow brighter and vice-versa.
More current produces more heating effect and hence the filament heats up completely and it glows brighter but it glows... View Article
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... 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... View Article
Who owns the forest lands?
In India, the forest lands are owned by the Government. Classification of Forests in India In India, much of its... 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... 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... 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... 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.
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... View Article
What kind of energy possessed by a running athlete?
A running athlete possessed kinetic energy.
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... 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... 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... 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... 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
