1. a) For the trace, determine
(i) the maximum positive value of potential difference,
(ii) the maximum negative value of potential difference,
the frequency of the signal.
(b) The trace shows the variation in the potential difference across a 100 W resistor. Calculate the energy dissipated in the resistor
(i) for the first 1.00 ms,

3. 3. (a) Show that the unit of resistivity is W m.

5. 4. In the circuit shown, the battery has negligible internal resistance
a) Calculate the current in the ammeter when the terminals X and Y are short-circuited i.e. connected together,
(b) The terminals X and Y are connected to a 30 Ohm resistor
work out the total current in the circuit