CIRCUITS
CIRCUITS
Electrical circuits have to be a complete loop or path.
A SWITCH can open (break) a circuit or close (complete) a circuit.
Energy is transferred from the battery to the bulbs / motors / heater in a circuit.
CIRCUIT SYMBOLS
|Component Name |Circuit Diagram |
|Battery | |
|Switch | |
|Bulb | |
|Connecting Wire | |
|Motor | |
|Ammeter | |
|Voltmeter | |
CELLS & BATTERIES
A cell is a single energy electrical energy source (we usually call this a battery)
A battery is a collection of cells connected together.
The energy change in a cell or battery is Chemical Energy to Electrical Energy.
ELECTRONS
Static Electricity is caused by excess charges on a material.
Electrons are part of atoms that have a negative "electric charge".
ELECTRICAL CURRENT
In a circuit, CURRENT is a flow of electrons in the wires.
MEASURING CURRENT
Current is measured using an AMMETER.
The units of electrical current are Amps or Amperes (A).
The ammeter is connected in series.
VOLTAGE
Voltage is a measure of the energy carried by the charges in a circuit.
MEASURING VOLTAGE
Voltage is measured using a VOLTMETER.
The units of voltage are Volts (V).
The voltmeter is connected in parallel with a component.
SERIES Circuits
In a series circuit all of the components are connected in ONE loop.
The current is the SAME all the way round a series circuit.
The voltage is SHARED in a series circuit.
PARALLEL Circuits
In a parallel circuit components have their own separate loops.
The current SPLITS between the separate loops in a parallel circuit.
The voltage is the SAME across each branch in parallel.
ELECTRONIC Systems
All electronic systems have 3 stages
INPUT ( PROCESS ( OUTPUT
Input stages include microphones, switches light sensors and temperature sensors.
Output stages include motors, buzzers, loudspeakers and heaters.
Logic gates are a type of process stage.
A truth table shows us what a logic gate does.
|AND gate | |OR GATE | |NOT gate |
|[pic] | |[pic] | |[pic] |
Input A |Input B |Output | |Input A |Input B |Output | |Input |Output | |OFF |OFF |OFF | |OFF |OFF |OFF | |OFF |ON | |OFF |ON |OFF | |OFF |ON |ON | |ON |OFF | |ON |OFF |OFF | |ON |OFF |ON | | | | |ON |ON |ON | |ON |ON |ON | | | | |
Questions – complete in your class notebook page.
1. Draw the circuit symbols for the following electrical components:
a. A bulb
b. A motor
c. A battery
d. A connecting wire
2. What does a battery supply in a circuit?
3. What is the energy change that takes place in a battery?
4. What do we call the 2 types of electrical charge?
5. What is an electrical current?
6. Name the device used to measure the current in a circuit.
7. Name the units that current is measured in.
8. Draw a simple circuit with a battery, motor, switch and the correct meter to measure the current.
9. Which statement correctly describes current in a series circuit:
A. The current in a series circuit decreases as it moves away from the battery
B. The current increases as it moves away from the battery
C. The current stays the same all around the circuit
10. What is the definition of voltage?
11. Name the device used for measuring voltage.
12. Name the units that voltage is measured in.
13. Which statement correctly describes voltage in a parallel circuit:
A. The voltage in a parallel circuit splits between the branches
B. The voltage in a parallel circuit increases as it moves away from the battery
C. The voltage in a parallel circuit is the same across each branch
14. Draw a circuit diagram with a battery and 2 bulbs connected in parallel.
15. State one advantage of connecting devices in parallel.
16. What are the 3 stages of any electronic system?
17. Name 3 input devices
18. Name 3 output devices
19. Draw the correct symbol for an AND gate
20. Draw the truth table for an OR gate
21. Describe in words what a NOT gate does.
-----------------------
M
A
V
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related searches
- troubleshooting electronic circuits pdf
- electronic circuits schematics pdf
- crystal circuits oscillator
- electrical circuits formula sheet
- dc circuits formula sheet
- series and parallel circuits pdf
- electrical circuits series vs parallel
- resistive circuits examples
- series and parallel circuits key
- series parallel circuits worksheet pdf
- design of analog cmos integrated circuits 2nd
- logic circuits pdf