Magnetic Field produced by Electric Curent
Magnetic Field produced by Electric Current
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.
Which of the following are correct : (a) The experiment on magnetic field produced by electric current was done by Danish physicist Hans Christian Oersted. (b) The magnetic properties of atoms are dependent on the direction of motion of electrons. (c) An electric current flowing through a conductor produces magnetic field. | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following are correct : (a) Danish physicist Hans Christian Oersted concluded that an electric field cannot be produced without charge but magnetic field can be produced without magnet. (b) The electron while rotating around the nucleus also revolve around their own axis similar to the motion of the Earth around the Sun and round its own axis. (c) An electric current flowing through a conductor produces magnetic field. | |||
| Right Option : D | |||
| View Explanation | |||
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 | |||
| View Explanation | |||
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