describe an experiment to demonstrate the magnetic field around a current - carrying wire using a compass needle. what does the deflection of the needle of the needle and its direction indicate?
(a) Wrap the wire around the compass needle and observe its deflection.
(b) Place the wire parallel to the compass needle and note the direction of deflection.
(c) Bring the compass needle close to the wire and observe any changes in color.
(d) Connect the wire to a battery and place the compass needle at a distance.
