Drawing Magnetic Field Lines

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Why are magnetic field lines considered closed curves around a magnet?

Because the direction of field lines is from the magnet's south pole to its north pole.

What is the significance of drawing magnetic field lines around a magnet?

To represent the magnetic field around the magnet visually.

How is the direction of the magnetic field around a magnet defined?

By the direction in which a north pole of a compass needle moves inside it.

How is the relative strength of the magnetic field represented in the pattern of field lines?

By the degree of closeness of the field lines. Signup and view all the answers

How can the deflection of a compass needle along a field line indicate the strength of the magnetic field?

The deflection increases as the needle moves towards the poles, showing stronger magnetic field closer to the poles. Signup and view all the answers

Why do magnetic field lines not cross each other?

Because if they did, the compass needle would point towards two directions at the point of intersection, which is not possible. Signup and view all the answers

What is the purpose of repeating the activity with the straight copper wire and compass needle?

To find the direction of the magnetic field produced by the electric current. Signup and view all the answers

How can the direction of the magnetic field be determined using a compass needle?

By observing the direction of deflection of the north pole of the compass needle. Signup and view all the answers

What change in the direction of current through the copper wire results in a reversed magnetic field direction?

From south to north. Signup and view all the answers

What does the observation of the needle moving towards the west indicate about the magnetic field direction?

The magnetic field direction is reversed. Signup and view all the answers

What happens to the north pole of the compass needle when the current flows from north to south?

It moves towards the east. Signup and view all the answers

Describe the change in the direction of the needle when the current through the copper wire changes from south to north.

The needle moves towards the west. Signup and view all the answers

How does an electric current in a rod affect its displacement in a magnetic field?

Increased current in the rod will increase its displacement in the magnetic field. Signup and view all the answers

How does using a stronger horse-shoe magnet affect the displacement of rod AB?

Using a stronger horse-shoe magnet will increase the displacement of rod AB. Signup and view all the answers

How does increasing the length of rod AB affect its displacement in a magnetic field?

Increasing the length of rod AB will increase its displacement in the magnetic field. Signup and view all the answers

In which direction is a positively charged particle deflected if projected towards west and then deflected towards north by a magnetic field?

The magnetic field is directed upward. Signup and view all the answers

What technique is used to obtain images of different body parts based on the magnetic fields inside the body?

Magnetic Resonance Imaging (MRI) Signup and view all the answers

Which two main organs in the human body produce significant magnetic fields?

The heart and the brain Signup and view all the answers

Drawing Magnetic Field Lines

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