Three particles, each of mass m grams situated at the vertices of an equilateral triangle ABC of side I cm (as shown in the figure). The moment of inertia of the system about a line AX perpendicular to AB and in the plane of ABC, in gram-cm^2 units will be.

A metal wire ABC of length 3 cm is placed in front of a concave mirror of focal length 20 cm as shown in figure. If AB = 1 cm and BC = 2 cm, then find the coordinates image of point A and C of the wire.

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ABC is a right - angled triangle, where AB and BC are 25 cm and 60 cm, respectively. A metal sphere of 2 cm radius charged to a potential of 9×10^5 V is placed at B as in (Fig. 3.133). Find the amount of work done in carrying a positive charge of 1 coulomb from C to A.

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A conductor in the form of a right angle ABC with AB = 3 cm and BC = 4 cm carries a current of 10 A. There is a uniform magnetic field of 5 T perpendicular to the plane of the conductor. The force on the conductor will be