Directions: Choose the letter of the best answer. 1. One – way flow of current happens in this type of circuit called _____________. A. series B. complex C. parallel D. inductive 2. What type of circuit has more than one path allowing other loads to remain unaffected even one of them is not functioning? A. complex B. parallel C. inductive D. series 3. What will happen to the other bulbs in a parallel connection when one bulb is removed? A. few bulbs will light. C. The other bulbs will still light. B. A few bulbs will no longer light. D. The other bulbs will no longer light. 4. What will happen to the other bulbs in a series connection when one bulb is removed? The other bulbs will ________________________. A. light B. not light C. have dim light D. have bright light 5. Which of the following measures can prevent fire caused by electricity? A. Have a regular inspection of electrical cords C. Touch a switch with dry hands. B. Avoid walking under low dangling wires. D. Do not leave sockets empty. 6. Imagine a simple circuit with one 1.5V battery and one bulb. When the 1.5 battery is replaced with a 3V battery___. A. The bulb gets brighter. C. The bulb stays at the same level of brightness. B. The bulb gets dimmer. D. Nothing has changed. 7. What is the effect of changing the wire in a circuit from a straight short wire to a longer coiled thick wire? A. The bulbs become dimmer. C. The bulbs stay at the same level of brightness. B. The bulbs become brighter. D. Nothing has changed. 8. When fewer bulbs are used in a circuit, the brightness of each bulb ___________. A. increases B. decreases C. disappears D. none of the above 9. In a simple circuit with long coiled wire, 1.5 volts and a bulb. Why does the bulb get dimmer? A. because the power supply is not enough to light the bulb brighter B. because the load is too many C. because the wire is too long D. because the wire is too short 10. Ruby makes a complete circuit with one bulb and three batteries. The bulb lights for an instant and then goes out. Why? A. Not enough electricity flows around the circuit. B. Too much electricity flows through the bulb’s filament. C. The batteries are flat. D. The batteries are not enough to light up the bulb.
