What will be the polarity of the coil when the South Pole?
when seeing from the left hand side (i.e. from magnet 1) the direction of induced current appears to be Anticlockwise. Though, on seeing from the left hand side, the South pole of magnet is coming towards, according to Lenz’s Law the coil will behave like a South pole, thus the direction of current is Clockwise.
How do you reverse the polarity of an electromagnet?
Reversing the Polarity of an Electromagnet Find the two wires that are attached to the electromagnet and disconnect them, using pliers or a screwdriver. Reverse the positions of the wires. When you turn on the power, the poles of the electromagnet will be reversed.
What is the polarity of electromagnet?
The polarity of the electromagnet is determined by the direction the current. The north pole of the electromagnet is determined by using your right hand. Wrap your fingers around the coil in the same direction as the current is flowing (conventional current flows from + to -).
What will be the polarity of one end of a solenoid?
Answer. Answer: One end of the solenoid becomes the N-pole and other end becomes the S-pole. Considering on end of the solenoid, if the circular face of the current flows in the anticlockwise direction, that end becomes the N-pole and if the current flows in the clockwise direction, that end becomes the S-pole.
What will be the polarity?
Earlier when the current flows from A to B, the polarity of A is South pole and that of B is North pole. If the direction of current is reversed, the respective polarities of A and B will also reversed i.e. new polarity of A will be North pole and that of B will be South pole.
When current is passing through solenoid then it behaves like?
When current is passed through solenoid, the electrons in it due to motion create magnetic field like a bar magnet. Answer: A solinoid is a Electric coil . When current passing through the coil it will generate two magnetic poles jut like a bar magnet .
What happens when current passes through solenoid?
A solenoid is a long coil of wire wrapped in many turns. When a current passes through it, it creates a nearly uniform magnetic field inside. Solenoids can convert electric current to mechanical action, and so are very commonly used as switches.
What happens when current flows through solenoid?
An electromagnet is a coil of wire with an electric current flowing through it. When the wire is coiled around in a cylinder, we call this a solenoid. The solenoid becomes an electromagnet when a current flows through it.
Why insulated copper wire is used in solenoid?
Insulated copper wire is used in making solenoid, because if we use without insulation current flows in the shortest path (straight path) and gets short circuited, so that it cannot behave as an electromagnet. To provide electromagnet, our coil will not magnetise fully and we will not get strong magnet.
Why insulated copper wire is used in electric motor?
It preserves the wire material against environmental threats and resists electrical leakage. Copper is used in these electromagnets as coiled wire because it has a low electrical resistance i.e., it is easy for the current to flow through it. Also, a copper wire can be easily shaped to make a coil.
Why is wire insulated?
What is Insulation & Why Do We Need It? Any item that carries an electrical current is designed to do so safely and with some type of insulation. The insulation limits the flow of current between the different conductors and between the conductors to ground.