(a(i))[1]
State the identity of component B.
(a(ii))[2]
Describe how the student may use the circuit in Fig. 9.1 to determine whether a material is an electrical conductor.
(a(iii))[1]
State which of the materials are electrical conductors. Put a tick in the box beside each material that is an electrical conductor. plastic ☐ copper ☐ rubber ☐ gold ☐
(b(i))[1]
Name the instrument used to measure the potential difference (p.d.) across resistor R.
(b(ii))[3]
Calculate the resistance value of resistor R.