(a)[2]
The student has a resistor with resistance $330\,\Omega$. Three coloured bands are used to show the value of its resistance, as illustrated in Fig. 3.2(a). Use the colour code chart in Fig. 3.2(b) to state the colour of the bands on the resistor.
(b)[3]
The student places the resistor in series with the diode to protect the diode. He arranges a circuit to measure different values of the current in the diode and the voltage across the diode. In the space below, draw the circuit diagram the student can use.
(c)[1]
Explain how the student may take readings for different values of $V$.
(d)[1]
The diode allows current to flow in one direction and stops it in the opposite direction. State how the circuit can be altered to demonstrate this.