Magnetic Effect...

A long current carrying wire PQ is free to move when placed in a magnetic field B at right angles to the wire, as shown. Then

The green colour insulated wires used for:

Arun suspended a bar magnet on a string as shown in the diagram below. He brought $$3$$ bar-shaped objects $$P,\ Q,$$ and $$R$$ towards the bar magnet. He placed the ends ($$X$$ and $$Y$$) of each object, near the north pole of the bar magnet and recorded his observations in the table below.

What will happen when three bar magnets are hung in the manner as shown below?

Two mutually perpendicular conductors carrying currents $$I_1$$ and $$I_2$$ lie in one plane. If $$I_1$$ is taken along x-axis and $$I_2$$ along y-axis, the locus of points where magnetic induction is zero is

In the given diagrams, compasses are used to plot the magnetic field around a bar magnet with poles marked N(North) and S(South). Which of the following diagrams correctly shows the expected field pattern?

If you place a compass near a current conducting wire, it will:

Study the arrangement of three bar magnets as shown below. Which arrangement is possible?

In the given diagram, when the magnet is pushed in to the solenoid, the pointer of the galvanometer defects slightly to the left.
which of the flowing would produce a defection of the pointer towards the right?

A long straight vertical wire carries a current of $$10$$ amperes flowing upwards through it at a place, where the horizontal component of the earth's magnetic field is
$$0.3$$ gauss. Then the total magnetic field at a point 5 cm from the wire due magnetic north of the wire is: