150W uuepelluerit novements. 8. Name an instrument that measures potential difference between two points in a circuit Define the unit of potential difference in terms of SI unit of charge and work. Draw the circuit symbols for a (i) variable resistor, (ii) a plug key which is closed one. Two electric circuits I and II are shown below (i) Which of the two circuits has more resistance? (ii) Through which circuit more current passes? (iii) In which circuit, the potential difference across each resistor is equal? (iv) If R, > R, > Ry, in which circuit more heat will be produced in R, as compared to other two resistors? R2 R3 R1 wwww men min mening H :