Magnetic Field due to Solenoid
Magnetic Field Due To A Solenoid
A long insulated wire is tightly wound in the shape of a spring, with closely spaced turns that lie side by side, is known as a solenoid The figure below shows a solenoid.The difference between a solenoid and a circular coil is the fact that the length of the solenoid is much greater than its diameter.
When a current enters a solenoid at one end, it passes through each turn before coming out at the other end. Each turn acts as a circular coil and will produces its own magnetic field. The figure below shows a few turns of a solenoid. We can observe that the net magnetic field as represented by the magnetic field lines is similar to that of a bar magnet.
Actually, a current-carrying solenoid behaves like a bar magnet of the same shape. The magnetic field inside a long current-carrying solenoid is nearly uniform and is parallel to the axis of the solenoid. It also has opposite poles at its ends. The intensity of magnetic field depend on the following factors
1. The intensity depends on the number of turns in the coil per unit length. The more the number of turns of wire around the core the more will be the magnetic effect.
2. The intensity depends on the amount of current flowing in the solenoid. More is the current more will be the intensity of magnetic field.
On switching off of the current the core will lose its magnetic effect, i.e., it will stop behaving like a magnet such magnet are called temporary magnets because they behave as a magnet as long as electricity flows through them.
A solenoid is a device which can be used as an electromagnet. An electromagnet can be made by warping a wire around a soft iron piece (known as the core). A magnet made using such an arrangement is called an electromagnet. It is made of a long wire that has been wound many times (usually around a hollow metallic core). It has the shape of a long cylinder.
An electromagnet can be made by warping a wire around a ___________________ iron piece (known as the core) . | |||
| Right Option : A | |||
| View Explanation | |||
A solenoid is a device that can be used as an_____________________. | |||
| Right Option : B | |||
| View Explanation | |||
On what factor(s) does a magnetic field produced due to a current carrying solenoid depends? | |||
| Right Option : C | |||
| View Explanation | |||
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