Consider a galvanometer with an internal resistance of 92 Ω. If it deflects full-scale when it carries a current of 0.5 mA, what is the value of the series resistance that must be connected to it if this combination is to be used as a voltmeter having a full-scale deflection for a potential difference of 1.1 V? Answer in units of Ω.

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?