A Simple Direct Current (DC) Current.pptx

illustrating a simple direct current

1. A Simple Direct Current (DC) Current

2. Write F if the sentence states a Fact or B if it is a Bluff. Electricity is a form of energy. ________ Electrons travel in an electric current through a path. ________ Electricity flows only through wires. ________ Electricity is based on the movement or flow of electrons. _________ Power lines that are down are dead. ________ F F B F B

3. Describe the connection based on the diagram presented. What will happen to the bulb after turning on the switch? Why? What will happen to the bulb after turning off the switch? Why?

4. This closed loop is called a circuit . The circuit has three parts. First, you have a dry cell which is the source of electricity . Second, you have a light bulb which will use the electricity. Third, you have the wires that connect the light bulb to the source of electricity. The wires through which an electric current flow is called a conductor. 1 2 3

5. In the given setup, one wire is attached to the negative end of the battery while the other wire is attached to the positive end. Both wires are attached to the bulb. Electricity flows from the negative to the positive pole. Current electricity can flow only when the circuit is complete. A complete circuit is the complete path consisting of a conductor through which an electric current can flow from the source of electricity and back again.

6. Electricity flows through wires which are made of metals. Metals are good conductors of electricity. Electric wires are covered with materials through which electricity does not flow. These materials are called insulators . It is necessary to cover electric wires with insulators so electricity cannot flow freely through them.

7. A switch is a device that completes and breaks the electric circuit. Whenever you need electricity, you simply turn on a switch. You turn off a switch when you no longer need the electricity. When the knob is switched to ON , the metals touch and make the circuit complete, so electricity flows. When the knob is switched to OFF , the metals do not touch so the circuit is not complete and electricity does not flow.

8. A closed circuit makes the bulb light up because the path of electricity is complete allowing electricity to flow through it. Electricity flows from the negative to the positive terminal of the dry cell.

9. An open circuit is a kind of circuit wherein the electricity does not flow because there is a gap or no complete path from one end of the circuit to the other end.

10. Symbols and Parts of Simple Electric Circuit

11. Study the given diagram and answer the questions briefly. Based on the diagram, will the bulb light up? Why? What will happen to the bulb if you turned off the switch? What will you do to turn on the switch? Draw a diagram to show a lighted bulb.

12. Based on the diagram, will the bulb light up? Why? No, because the loop is open and the electric current cannot flow. No, because the loop is open and the electric current is sufficient. Yes, because the loop is closed and the current will not flow. Yes, because the loop is closed and the current is sufficient.

13. 2. What will happen to the bulb if you turned on the switch? A. The bulb will break. B. The bulb will get dimmer. C. The bulb lights up. D. There will be no changes to the bulb

14. 3. What will happen to the bulb if you turned off the switch? A. The bulb will light up. B. The bulb will be broken. C. The bulb will produce heat. D. The bulb will not produce light.

15. 4. What needs to be done to this circuit so that the lamp will light up? Close the switch. Add another lamp. Add a cell and close the circuit. Add a motor and close the switch

16. 5. What is wrong in this circuit diagram? There is no switch. There are two bulbs. There is only one battery. There is a missing wire.

17. 6. What is the function of a power source in a circuit? A. It provides a steady source of electricity B. It provides a means through which the circuit can be broken C. It opens and closes the circuit D. It resists the flow of electrons 7. How does a switch work in a simple current circuit? A. It controls the heat supply. B. It opens and closes a circuit. C. It stops the flow of electricity. D. It gives continuous current supply

18. 8. What might happen if there is no switch in a simple direct current circuit? A. It lights up the bulb. B. It contains high voltage power. C. There is no passageway of electricity. D. There is no control in the flow of electricity from the source. 9. A simple direct current circuit has power supply, load, switch and a__. A. Battery B. Bulb C. Wire D. Motor 10. In a simple direct current circuit, why does the bulb light when you close the switch? A. Because the switch produces electricity. B. Because closing the switch completes the circuit. C. Because closing the switch breaks the circuit. D. Because the switch provides enough power supply.

19. Based on the diagram, will the bulb light up? Why? No, because the loop is open and the electric current cannot flow. No, because the loop is open and the electric current is sufficient. Yes, because the loop is closed and the current will not flow. Yes, because the loop is closed and the current is sufficient.

20. 2. What will happen to the bulb if you turned on the switch? A. The bulb will break. B. The bulb will get dimmer. C. The bulb lights up. D. There will be no changes to the bulb

21. 3. What will happen to the bulb if you turned off the switch? A. The bulb will light up. B. The bulb will be broken. C. The bulb will produce heat. D. The bulb will not produce light.

22. 4. What needs to be done to this circuit so that the lamp will light up? Close the switch. Add another lamp. Add a cell and close the circuit. Add a motor and close the switch

23. 5. What is wrong in this circuit diagram? There is no switch. There are two bulbs. There is only one battery. There is a missing wire.

24. 6. What is the function of a power source in a circuit? A. It provides a steady source of electricity B. It provides a means through which the circuit can be broken C. It opens and closes the circuit D. It resists the flow of electrons 7. How does a switch work in a simple current circuit? A. It controls the heat supply. B. It opens and closes a circuit. C. It stops the flow of electricity. D. It gives continuous current supply

25. 8. What might happen if there is no switch in a simple direct current circuit? A. It lights up the bulb. B. It contains high voltage power. C. There is no passageway of electricity. D. There is no control in the flow of electricity from the source. 9. A simple direct current circuit has power supply, load, switch and a__. A. Battery B. Bulb C. Wire D. Motor 10. In a simple direct current circuit, why does the bulb light when you close the switch? A. Because the switch produces electricity. B. Because closing the switch completes the circuit. C. Because closing the switch breaks the circuit. D. Because the switch provides enough power supply.