Why does a galvanometer show deflection when a current is passed through it?

When the magnet is moved away from the coil, the galvanometer shows deflection in the opposite direction indicating the direction of induced current in the reversed direction. This indicates that when there is a relative motion between the coil and the magnet a current is induced in the coil.

Why does the galvanometer deflect in the opposite direction in potentiometer?

it is due to the magnetic effect of electric current. when current is passed through the wires the magnetic field is produced and this magnetic field is linked with galvanometer. thus galvanometer deflects in opposite direction.

Why does galvanometer not show deflection on AC current?

When an a.c. passes through the galvanometer, it shows no deflection , why? A moving coil galvanometer measures average value of current, which is zero for a.c. over a cycle. So, galvanometer shows no deflection.

Which direction is the current flowing when the galvanometer needle moves to each direction?

The current flows through the moving coil galvanometer, and this causes the needle to deflect by a certain amount. And charge will continue to flow around the circuit in a clockwise direction until it gets back to the cell, which completes the circuit.

How does galvanometer show direction of current?

The deflection of the galvanometer needle indicates the presence of current in the coil. The direction of deflection of the needle gives us the direction of flow of current.

Why does deflection in galvanometer is in one direction when we make connection for meter bridge?

Note the deflections in the galvanometer. If the galvanometer shows deflections in opposite directions, the connections are correct. If the deflection is in one side only then there is some fault in the circuit, so the connections need to be checked. The point where the jockey is touching the wire is null point B.

Does the deflection depend on the direction of current?

The direction of the flow of current would depend on which pole of the magnet is brought close to the solenoid. The direction of deflection of the needle in the galvanometer would depend on the direction of flow of current.

Why galvanometer is not used in AC Bridge?

In AC bridge galvanometer is not used because the rotating torque is dependent on the average current that is passing through the coils of a galvanometer. Also, the average AC current passing through the AC bridge will be zero and there will not be any deflection.

What would you conclude if deflection in galvanometer is in the same direction?

The correct option is B Connecting wire in the galvanometer circuit is broken.

Why is there no deflection in a galvanometer?

For positive half, it travels in a direction and in negative half, it travels in the opposite direction. This cancels each other in a cycle. Hence, no deflection in Galvanometer. That’s why, Galvanometer can only be used for direct current but not for alternating current. Hope, you get the answer.

What is the difference between ammeter and galvanometer?

Galvanometer – It senses small current flowing through and also the direction of flowing. Ammeter – Used to find the magnitude of the current. So initially galvanometer will be 0 which is in the centre whenever current flows it starts to deflect with corresponding direction.

What happens to the galvanometer when a bar magnet is in motion?

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.

How do you measure DC current with a galvanometer?

Try switching the wires, you give to galvanometer while measuring DC current, the galvanometer at first shows deflection in one way but when switch the polarity, the galvanometer’s needle deflect in a different direction. In the case of Alternating Current (AC), it is known that the current alternates every time.