17. Draw a circuit with a battery and two bulbs in parallel. Voltage must be measured across each witch must be drawn that controls all the current leaving the power supply. 18. Draw a circuit with a battery and 4 lamps. Each lamp has its own switch. An additional switch controls all of the bulbs. Voltage must be measured over one bulb. 19. Draw a circuit with a battery and five bulbs connected in parallel. One switch controls all the current returning to the power supply. Voltage is measured across any one bulb. Another voltmeter measures voltage across any one other bulb. 20. Draw a circuit with a battery and three lamps connected in parallel. Current is measured through each lamp. A switch controls ALL the current returning to the power supply. Current is also measured after it leaves the switch