Transcript Basic Electricity

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.