MAGNET EFFECTS OF ELECTRIC CURRENT (CLASS 10) (3.8mins quiz)

The magnetic field lines always begin from

• N-pole and end on S-pole.

• S-pole and end on N-pole.

• start from the middle and end at N-pole.

• start from the middle and end at S-pole.

Magnetic field is strongest at

• Near the poles

• Inside the magnet

• Outside the magnet

• Along the parallel sides of the magnet

Choose the incorrect statements from the following regarding magnetic lines of field.

• the direction of magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points.

• magnetic field lines are closed curves

• if magnetic field lines are parallel and equidistant, they represent zero field strength

• relative strength of magnetic field is shown by the degree of closeness of the field lines.

Name the scientist who discovered electromagnetism.

• Hans Christian Oersted

• Hans Christian Orested

• Han Christian Oersted

• Hans Christian Orsted

North pole is also called North Seeking Pole.

• TRUE

• FALSE

Why does a compass needle get deflected when brought near a bar magnet?

• The compass needle is a small magnet.

• The magnet field lines interact.

• There is an electromagnetic deflection shown in the field lines.

• Compass is a magnet.

The iron fillings are almost parallel to the surface of the magnet on its parallel sides. Give reason.

• Magnetic force is very less there.

• Inside the magnet the field lines go from South to North.

• Magnetic force is strongest inside the magnet.

• The question is wrong.

The _______ of the magnetic field is shown by the degree of closeness of the field lines.

• relative strength

• strength

• total strength

• absolute strength

Why the magnetic field lines never intersect.

• The magnetic compass needle will show two directions.

• The magnetic field lines will two directions.

• The lines which are used to represent magnetic field lines on paper will intersect and show two directions.

• No direction will be shown.

What is magnetic field?

• Scalar

• Vector

• Victim

• Scalvector