Name three liquids, which when tested in a manner shown in fig. may causes the magnetic needle to deflect.

Name the three liquids which when tested in the manner shown in the given figure, may cause the magnetic needle to deflect

When the free ends of the tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason ?

Name three metals which are liquids at room temperature.

Three girls skating on a circular ice ground of radius 200 m start from a point P on the edge of the ground and reach a point Q diametrically opposite to Pfollowing different paths as shown in Fig. 4.20. What is the magnitude of the displacement vector for each ? For which girl is this equal to the actual length of path skate?

Name the physical quantity which is same different in all bulbs when three bulbs are of different wattage are connected in series.

Name the physical quantity which is same different in all bulbs when three bulbs are of different wattage are connected in parallel.