A bar magnet falls from a heigh h through a metallic ring. Will its acceleraton be equal to g? Give reason for your answer.

A small magnet falls through a metal ring. Will its acceleration be equal to g?

How many triangles can be drawn having its angles as 45^@,64^@ and 72^@ ? Give reasons for your answer.

How many triangles can be drawn having its angles as 53^@,64^@ and 63^@ ? Give reason for your answer.

Suppose a man proposes a theory that the earth's magnetic field is due to permanent magnetisation field is due to permanent magnetisation of molten iron core of earth. Will you acceept this theory? Give reasons for your answer.

Diagonals of a rectangled are equal are perpendicular. Is this statement true? Give reasons for your answer.

Cyanide ion acts as an ambident nucleophile. From which end it acts as a stronger nucleophile in aqueous medium? Give reason for your answer.

Is it possible to construct a triangle with length of its sides as 4 cm, 3 cm and 7 cm give reasons for your answer.

Direction. In the following questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if assertion is true, but reason if false, (D) if both assertion and reason are false Assertion : When a bar magnet falls freely along the axis of a solenoid held vertically, its acceleration is less than the acceleration due to gravity Reason: The falling magnet induces current in the solenoid and according to Lenz's law, the induced current opposes the falling motion of the magnet

An a–particle and a proton are released from the centre of the cyclotron and made to accelerate. Can both be accelerated at the same cyclotron frequency? Give reason to justify your answer.

A door is hinged at one end and is free to rotate about a vertical axis. (show in the figure) Does its weight cause any torque about this axis ? Give reasons for your answer.