Two cities are 150km apart. Electric power is sent from one city to another city through copper wires. the fall of potential per km is 8 volt and the average resistance per km is 0.5. The power loss in the wires is:
The resistance in the two arms of the meter bridge are 5 and R, respectivilty. When the resistance R is shunted with an equal resistance, the new balance point is at . The resistance 'R' is:
See the electric circuit shown in the figure.
Which of the following equations is a correct equation for it?
A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery used across the potentiometer wire , has an emf of 2.0V and a negligible internal resistance. The potentiometer wire itself is 4m long, when the resistance R, connected across the given cell, has value of
(i) infinity (ii) 9.5
The balancing lengths', on the potentiometer wire are found to be 3 m and 2.85m, respectivily. The value of internal resistance of the cell is