The circuit diagrams illustrate circuits that can control the potential difference (p.d.) across a lamp. Which circuit makes it possible to vary the p.d. across the lamp from $0\,\text{V}$ to $6.0\,\text{V}$?
Physics 0625 · IGCSE · Electric circuits
The circuit diagrams illustrate circuits that can control the potential difference (p.d.) across a lamp. Which circuit makes it possible to vary the p.d. across the lamp from $0\,\text{V}$ to $6.0\,\text{V}$?