An electric current flowing through a conductor produces magnetic field. This was first observed by in 1820 by a Danish physicist Hans Christian Oersted. It is said that he was demostrating an experiment to show heating effect of electric current. He noticed that each time he switched on the current a magnetic compass placed near the circuit showed a deflection, which led to the first connection between electricity and magnetism.
Electrons inside an atom are in rotational motion around the nucleus as shown in the figure. It is equivalent to a current loop. Hence atom as a whole consists of many tiny magnets. The magnetic properties of atoms are dependent on the direction of motion of electrons.
The device that can be used to detect the presence of current in a circuit is __________________ | |||
Right Option : A | |||
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Rojer takes a rod and connects its one ens with the electric current. He finds the rod behaves like a magnetic and exerts attractive force on magnetic material, such as, iron and nickel. The force which is being exerted by the rod is known as--- | |||
Right Option : C | |||
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An electric current flowing through a _____________________ produces magnetic field. | |||
Right Option : A | |||
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