# electronics - Loxford | School

```Loxford School of Science &amp; Technology
ELECTRONICS
A guide to help with the transition from GCSE to A-Level
Name:
Sketch the circuit diagram symbols for the following. You will have to use your independent
research skills to do this.
DIODE:
FUSE:
POTENTIOMETER:
RESISTOR:
THERMISTOR:
LDR:
LED:
ZENER DIODE
:
MOSFET n Channel:
BIPOLAR NPN TRANSISTOR:
CAPACITOR:
TUNING CAPACITOR:
Can you find the answers to the following…
1. Mega means
2. Milli means
3. What is 0.1μF in nanofarads?
4. What is 105 x 10-3
5. What is 105 / 10-3
6. What is 2700 Ω in kΩ?
7. Calculate 1 / (1 / 10 + 1 / 7)
8. Calculate 12 x 5000 / (5000 + 7000)
9. Rearrange the formula. If P = I V
then V =
10. Rearrange the formula. If R = V / I then V =
The following is a true or false quiz. You will need to
research the answers in order for you to complete it
Q1).
A microphone enables you to hear what others are saying.
Q2).
All metals are good conductors of electricity.
Q3).
A lamp operates from 12V, with a current passing of 5A, dissipates a power of 60W.
Q4).
A diode allows electric current to pass in only one direction.
Q5).
The electronic symbol for a battery is
Q6).
Television signals are transmitted in the UHF band.
Q7).
The heart of a computer is a microprocessor.
Q8).
The electronic symbol for a capacitor is
Q9).
A LED emits sound.
Q10).
The electronic symbol for a resistor is
Q11).
Electric current is measured in Volts.
Q12).
Electric power is measured in Watts.
Q13).
CRT stands for Cannot Remember a Thing.
Q14).
UHF stands for Upper High Frequencies.
Q15).
A battery is a source of electrical energy.
Q16).
The electronic circuit symbol for a diode is
Q17).
LCD stands for Liquid Crystal Display.
Q18).
The electronic circuit symbol for a lamp is
Q19).
A transistor amplifies voltage.
Q20).
Computer memory is normally measured in bites.
Q21).
A CRT is found in a television.
Q22).
The unit of capacitance is the Farad.
Q23).
A radio station transmitting on 100MHz has a wavelength of approximately 3m.
Q24).
A Kilobyte is the way that a snake stuns its prey.
Q25).
A LDR emits light.
Q26).
A capacitor stores electric charge.
Q27).
FM radio is usually transmitted in the medium wave band.
Q28).
Electric current is measured using a voltmeter.
Q29).