# What Happens When There Is A Current In The Coil?

## Where is a magnetic field strongest?

the closer the lines, the stronger the magnetic field (so the magnetic field from a bar magnet is strongest closest to the poles) the lines have arrowheads to show the direction of the force exerted by a magnetic north pole..

## Can you use AC for DC?

But why do we use AC instead of DC? There are two reasons. First, if you have an alternating current, you can easily change the voltage by using a transformer (essentially just two coils of wire with different numbers of turns). Second, with AC you can use very high voltage for power line transmission.

## What will happen if there is a change in a magnetic field?

Some people believe global cataclysm will occur when Earth’s magnetic poles reverse. When north goes south, they say, the continents will lurch in one direction or the other, triggering massive earthquakes, rapid climate change and species extinctions.

## What happens when a current is passed through a coil?

Either an electric current is passed through the wire of the coil to generate a magnetic field, or conversely an external time-varying magnetic field through the interior of the coil generates an EMF (voltage) in the conductor. … The more turns of wire, the stronger the field produced.

## Does a current carrying coil produce uniform magnetic field?

No, magnetic field produced due to a current carrying cirular coil is not uniform. However, it may be considered as uniform at the centre of the coil.

## Where is Earth’s magnetic field the weakest?

equatorThe intensity of the magnetic field is greatest near the magnetic poles where it is vertical. The intensity of the field is weakest near the equator where it is horizontal. The magnetic field’s intensity is measured in gauss. The magnetic field has decreased in strength through recent years.

## What happens when the magnet is removed from the coil in a circuit?

The direction of the induced voltage is reversed when the magnet is moved out of the coil again. It can also be reversed if the other pole of the magnet is moved into the coil. If the coil is part of a complete circuit then a current will be induced in the circuit.

## When you immerse a current carrying coil in a magnetic field is there a net force on the coil?

The Torque on a Current Loop A uniform magnetic field exerts no net force on a current loop but it does exert a net torque. Let’s say the magnetic field is in the plane of the loop and is parallel to two sides.

## What happens if there is no change in the direction of current in the coil of wire which is kept in uniform magnetic field?

If there is no change in the direction of the current in the coil of wire, it shows the property of the magnetic force acting on the moving charged particles. The free electrons move towards the positive end of the conductor with some velocity. As a result of this, magnetic force acts on them.

## What is the difference between an AC coil and a DC coil?

From a structural and physical standpoint there is no difference between an AC and a DC electro-magnetic coil. They both are made by wrapping of wires around a core. For DC electro-magnets the core is usually made of iron or steel. For AC electro-magnetic coils the “core” could be air.

## Can you use a DC relay with AC?

If you apply AC to a relay designed for DC, it won’t have that continuity of field and will buzz and possibly not close. You can however operate an AC relay with DC, but you must use less than the rated voltage.

## Where is the strongest magnetic field in a coil?

Bar Magnet As can be visualized with the magnetic field lines, the magnetic field is strongest inside the magnetic material. The strongest external magnetic fields are near the poles. A magnetic north pole will attract the south pole of another magnet, and repel a north pole.

## What happens when a current carrying coil is placed in a magnetic field?

When current carrying coil is placed in the magnetic field torque acts on the coil. The torque acting on the coil will be zero if the coil and the magnetic field are perpendicular. Thus it orients such that the plane of coil is perpendicular to the field direction.

## What would happen if the current in the coil of an electromagnet were increased?

Increasing the strength of the magnetic field – If the same coil of wire is moved at the same speed through a stronger magnetic field, there will be more emf produced because there are more lines of force to cut.

## What happens if we apply AC to a coil rather than DC?

If a coil is made for AC, its DC resistance would be far less than the impedance an alternating current has. Instead the coil would be like a long piece of wire without much resistance. If the wire didn’t overheat the coil would become an electromagnet. … When the coil is disconnected this magnetic field will collapse.