Electric Circuits and Cells

What are the components of an electric circuit?

• Transistors, diodes, resistors, inductors

• Frequency, wavelength, amplitude, phase

• Voltage, resistance, current, capacitance

• Power source, conductors, load, switch

Draw the symbol for a battery in an electric circuit.

• A circle with a plus and minus sign inside

• A triangle with a line through the middle

• The symbol for a battery in an electric circuit is represented by a long line with a shorter line parallel to it, and sometimes with a plus and minus sign to indicate the positive and negative terminals.

• A square with a lightning bolt inside

What is the function of an electric cell?

• The function of an electric cell is to convert chemical energy into electrical energy.

• The function of an electric cell is to store mechanical energy.

• The function of an electric cell is to produce light energy.

• The function of an electric cell is to convert sound energy into electrical energy.

Explain how an electric circuit works.

• An electric circuit works by using water to conduct electricity

• An electric circuit works by allowing the flow of electric current through a closed loop of conductive materials, such as wires and components. The current is generated by a power source, such as a battery or generator, and flows through the circuit to power devices or perform work.

• An electric circuit works by emitting light when the switch is turned on

• An electric circuit works by creating sound waves when the current flows through it

What is the purpose of an electric switch in a circuit?

• To regulate the temperature of the circuit

• To open or close the circuit and control the flow of electricity.

• To increase the speed of the electricity

• To change the color of the electricity

How can you change a circuit to make the bulb brighter?

• By reducing the current in the circuit

• By adding more bulbs to the circuit

• By increasing the resistance in the circuit

• By increasing the voltage or decreasing the resistance in the circuit.

Name the components needed to make a complete electric circuit.

• Power source, conductive material, and a load

• Magnetic material, semiconductor, and a capacitor

• Insulating material, resistor, and a switch

• Non-conductive material, battery, and a fuse

Draw the symbol for a closed switch in an electric circuit.

• Two parallel lines

• A circle with a line through it

• The symbol for a closed switch in an electric circuit is a line that connects the two sides of the circuit.

• A zigzag line

Describe the working of an electric cell.

• An electric cell works by converting mechanical energy into electrical energy through friction

• An electric cell works by converting chemical energy into electrical energy through a chemical reaction that creates a flow of electrons.

• An electric cell works by creating a magnetic field to produce electricity

• An electric cell works by using solar energy to generate electricity

Explain how to change a circuit to make the bulb dimmer.

• Remove the battery from the circuit to decrease the voltage

• Short-circuit the circuit to reduce the resistance

• Add a resistor in series with the bulb to increase the total resistance in the circuit.

• Replace the bulb with a higher wattage bulb to make it dimmer