Table of Contents
- 1 Why current flows in a coil when a magnet is pushed in and out of the coil?
- 2 Why the coil rotates when there is a current in the coil?
- 3 When a bar magnet is moving towards a coil then the deflection in the galvanometer connected with the coil?
- 4 When a magnet is moved towards a coil the direction of?
Why current flows in a coil when a magnet is pushed in and out of the coil?
When we induce a current in the coil, it becomes an electromagnet. One end of the coil is a north pole and the other end is a south pole. When we pull the magnet out, the left hand end of the coil becomes a south pole (to try and hold the magnet back). Therefore the induced current must be flowing clockwise.
What happens when a bar magnet is quickly moved towards a coil?
The shape of the coil is changed in a magnetic field. According to the question, first the magnet moves quickly, imparting maximum number of magnetic field lines in a short time. This implies that the rate of change of flux is maximum in this case and hence the induced emf will be larger.
Why the coil rotates when there is a current in the coil?
The coil of wire is mounted in the gap between the two magnets. The split rings make electrical contact with the coil and reverse the current every half turn. When an electric current flows through the coil, a force is exerted on the coil, causing it to spin.
When the magnet moves the current in the coil starts due to?
Electromagnetic Induction was first discovered way back in the 1830’s by Michael Faraday. Faraday noticed that when he moved a permanent magnet in and out of a coil or a single loop of wire it induced an ElectroMotive Force or emf, in other words a Voltage, and therefore a current was produced.
When a bar magnet is moving towards a coil then the deflection in the galvanometer connected with the coil?
When the north pole of the magnet is brought towards the coil, the galvanometer shows a sudden deflection indicating that a current is induced in the coil. The galvanometer deflection is temporary and it lasts as long as the bar magnet is in motion.
When a bar magnet is moved into the coil will there be a deflection in the voltmeter connected to it?
When a bar magnet is pushed towards ( or away ) from the coil connected to a galvanometer, the pointer in the galvanometer deflects.
When a magnet is moved towards a coil the direction of?
When a magnet is moved towards a coil the direction of induced current is clockwise.
What happens to the charges when the magnet is moved towards the coil?
When a magnet is moved into a coil of wire, changing the magnetic field and magnetic flux through the coil, a voltage will be generated in the coil according to Faraday’s Law. The polarity of the induced emf is such that it produces a current whose magnetic field opposes the change that produces it.