In an electroscope the connecting rod and the leaves are all metals.

When you touch the metal disc of an electroscope with a charged glass rod the metal leaves get diverged.

For each of the following compound statements first identify the connecting words and then break it into component statements. All rational numbers are real and all real numbers are not complex.

Aging of leaves.

An experimenter measures the length of a rod. In the caese listed, all motions are with respect to the lab and parallel to the length will be minimum?

Consider a variation of the previous problem. Suppose the circular loop lies in a vertical plane. The rod has a mass m. The rod and the loop have negligible resistances but the wire connecting O and C has a resistance R. The rod is made to rotate with a uniform angular velocity omega in the clockwise direction by applying a force at the midpoint of OA in a dirction perpendicular ot it. find the magnitude of this force when the rod makes an angle theta with the vertical.

Assertion: Overloading happens when a large no. of appliances are connected in series. Reason: All the electric points are connected in parallel in the domestic circuit.

Shows a conducting circular loop radius a placed in a uniform, perpendicular magnetic field B. A metal rod OA is pivoted at the centre O of the loop. The other A of the rod touches the loop. The rod OA and the loop are resistanceless but a resistor having a resistance R is connected between O and a fixed point C on the loop . the rod OA is made to rotate anticlockwise at a small but uniform angular speed omega by an external force. Find (a) the current in the resistance R and (b) the torque of the external force needed ot keep the rod rotating with the constant angular velocity omega.

Consider the situation shown in the figure of the previous problem. Suppose the wire connecting O and C has zero resistance but circular loop has a resistance R uniformly distributed along its length. The rod OA is made to rotate with a uniform angular speed omega as shown in the figure. Find the current in the rod when ltAOC = 90^@ .