After the magnet has crossd the metal ring, amount of magnetic flux linked with the ring goes on decreasing. An induced current developes in the ring and opposes the fall of the magnet. Therefore, downward acceleration of the magnet continues to be less than ‘g’.
Q. When a bar magnet is dropped into the coil will the acceleration of the magnet remain same?
when a bar magnet is made to fall through a closed circular coil kept horizontally,according to Faraday’s law an emf is induced in the coil,which again according to Lenz law,will oppose the downward motion of the magnet. Therefore the value of the acceleration changes.
Table of Contents
- Q. When a bar magnet is dropped into the coil will the acceleration of the magnet remain same?
- Q. What will you observe when one magnet is dropped into the coil?
- Q. Why does the acceleration of a bar magnet decrease?
- Q. How are eddy currents produced?
- Q. Why does the acceleration of a bar magnet decreases while falling through a solenoid connected to a close circuit?
- Q. When a bar magnet is allowed to fall through the axis of a vertical solenoid The acceleration in the magnet is less than the acceleration due to gravity explain why?
- Q. When a magnet falls through a vertical coil will its acceleration be different from the acceleration due to gravity?
- Q. When a magnet is made to fall freely through a closed coil its acceleration is always less than acceleration due to gravity?
- Q. When a bar magnet falls through a long hollow metal cylinder?
- Q. When small magnet is allowed to fall from Aluminium pipe then it will fall with acceleration less than G Why?
- Q. What is the acceleration of magnet?
- Q. What happens if the ring in the above case is cut so as not to form a complete loop?
- Q. What will be the acceleration of falling bar magnet which passes through the ring such that the ring is held horizontally and the bar magnet is dropped along the axis of the ring?
- Q. When a bar float falls through a long vector when the fixed acceleration of the magnet?
- Q. What happens to the acceleration of fall if the metallic ring is cut so as not forms a complete loop?
- Q. When the magnet is allowed to fall through an open ring then?
- Q. What happens if you put a coil around a magnet?
Q. What will you observe when one magnet is dropped into the coil?
As shown in figure when a bar magnet is dropped across a current carrying coil, emf is induced in the coil. emf appears as pulses when the bar magnet enters the loop and exits the loop. Induced emf is equal in magnitude to rate of change of magnetic flux but sign of emf is opposit to sign of flux change.
Q. Why does the acceleration of a bar magnet decrease?
The acceleration of a magnet falling through a long solenoid decreases, due to the opposition offered by induced emf.
Q. How are eddy currents produced?
Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field. They can be induced within nearby stationary conductors by a time-varying magnetic field created by an AC electromagnet or transformer, for example, or by relative motion between a magnet and a nearby conductor.
Q. Why does the acceleration of a bar magnet decreases while falling through a solenoid connected to a close circuit?
why does the acceleration of a bar magnet decrease while falling through a solenoid, connected to a closed circuit? The induced current will exert an opposing force which will reduce the acceleration of falling bar magnet.
Q. When a bar magnet is allowed to fall through the axis of a vertical solenoid The acceleration in the magnet is less than the acceleration due to gravity explain why?
When the magnet is allowed to fall vertically along the axis of loop with its north pole towards the ring. The upper face of the ring will become north pole in an attempt to oppose the approaching north pole of the magnet. Therefore the acceleration in the magnet is less than g.
Q. When a magnet falls through a vertical coil will its acceleration be different from the acceleration due to gravity?
When a magnet falls through a vertical coil, will its acceleration be different from the ‘acceleration due to gravity’? Yes the acceleration due to magnet will be different from that of ‘acceleration due to gravity’. This is because the motion of the magnet will be opposed in accordance with Lenz’s law.
Q. When a magnet is made to fall freely through a closed coil its acceleration is always less than acceleration due to gravity?
Answer. When the magnet approaches the coil the current induced in the coil will repel the approaching magnet, so acceleration of the magnet is less than that of acceleration due to gravity.
Q. When a bar magnet falls through a long hollow metal cylinder?
e.g., bar magnet ultimately fall with zero acceleration . hence, When a bar magnet falls through a long hollow metal cylinder fixed with its axis vertical, the final acceleration of the magnet is equal to zero.
Q. When small magnet is allowed to fall from Aluminium pipe then it will fall with acceleration less than G Why?
And hence a magnetic field will be induced by this induced current that reinforce the field lines coming upwards from the magnet to the ring. This attracts the magnet towards the ring. This will reduce the acceleration of the falling magnet below g.
Q. What is the acceleration of magnet?
electromagnetism forces magnetic-fields velocity geomagnetism. Gravity on earth pulls objects toward it with an acceleration of 9.8 m/s/s on Earth until the object reaches it’s max potential free fall speed. (
Q. What happens if the ring in the above case is cut so as not to form a complete loop?
A copper ring having a cut such as not to from a complete loop is held horizontally and a bar magnet is dropped through the ring with its length along the axis of the ring. The acceleration of the falling magnet is. As the ring is not a closed loop, induced e.m.f. is not produced and hence its motion is not affected.
Q. What will be the acceleration of falling bar magnet which passes through the ring such that the ring is held horizontally and the bar magnet is dropped along the axis of the ring?
Q. When a bar float falls through a long vector when the fixed acceleration of the magnet?
hence, When a bar magnet falls through a long hollow metal cylinder fixed with its axis vertical, the final acceleration of the magnet is equal to zero.
Q. What happens to the acceleration of fall if the metallic ring is cut so as not forms a complete loop?
If the ring is cut, an induced emf exists but the induced current is zero. Hence, there will be no opposing force to the falling magnet and it falls with the acceleration due to gravity.
Q. When the magnet is allowed to fall through an open ring then?
If the magnet falls vertically through a metallic ring, then the magnetic flux through the ring increases thus inducing an emf in the ring. The induced emf will oppose the fall of the magnet and therefore the acceleration will be less than the acceleration due to gravity.
Q. What happens if you put a coil around a magnet?
When you bend the wire into a coil, the magnetic fields around each loop of the coil add up to make a long , thin magnet with north at one end and south at the other. The more loops the coil has, the stronger the magnetic field, while the current is flowing. A magnet made from just a coil of wire isn’t very strong.
