Basic Electricity Revision Aspiration Respect Compassion Honesty Fairness Name the component Aspiration Respect Compassion Honesty Fairness Name the component Name the component What is the energy transformation Loudspeaker Microphone Hair straighter TV Lift going up Heater Lamp What are the missing words? The current is the ______at all points in a series circuit The voltages in a _______ circuit add to equal the battery voltage What are the missing words? The voltages in a ______circuit are all the same In a parallel circuit the _______ from the battery equals the sum of the currents through the lamps. Circuits Draw a circuit with a bulb a battery and a meter which will allow you to measure the voltage across the bulb Now add a meter to measure the current in the bulb. Resistance An increase in resistance causes current to _________________. A resistor causes electrical energy to be changed to _________ energy in the material. Resistance is measured in __________ , usually given the symbol . Resistance can be measured using an _______________. Draw the circuit you would use to measure When the resistance is reduced, the current is _______________. Explain how you would use readings from this circuit to calculate the resistance of the resistor Resistance What is the symbol for resistance What are the units of resistance What is the formula for resistance Variable Resistors A torch bulb is marked "6 V, 0.25 A". Calculate the resistance of the bulb. Calculate the resistance of a component when a voltage of 24 V causes a current of 0.1 amperes. A voltage of 6 volts is across a resistor where the current is 0.5 amperes. What is the value of the resistor? Variable Rsistors Name a use for variable resistors Name another use for variable resistors Many of them do this by varying the _____ of the conductor used.