(i) The voltage-current readings of a certain material are shown in the table given below:


Study the table.

(a) State whether the conductor used is ohmic or non-ohmic.
(b) Justify your answer.
(c) State Ohm's law,

(ii) Below is the diagram of a transformer:



(a) Identify the type of transformer.
(b) In this type of transformer which of the wire is thicker, the primary or the secondary? Give a reason.

(iii) Study the diagram:



(a) Calculate the total resistance of the circuit. (b) Calculate the current drawn from the cell. (c) State whether the current through 10Ω resistor is greater than, less than or equal to the current through the 12Ω resistor.

Solution

,,