1) What does LED stand for?

a) Light Emitting Display b) Low Energy Displayc) Light Emitting Diode d) Light Emitting Detector

2) Name the three leads of a common transistor

a) Collector Bias Omitter b) Base Collector Casec) Emitter Collector Bias d) Collector Base Emitter

3) Identify the correctly connected LED: (hint:leds cant stand high voltage, nearly 2V is enough, higher voltage may damage them)

a) A b) B c) C d) D

4) What does LDR stand forA. Light dependant resistor B. Long dependant resistorC. Light dependant radio D. Light dispenser resistor

5) What are the 2 terminals of a diode called? a) Pentode and Triode b) Anode and Cathode c) Drain and Source d) Gate and Drain

6) In a Digital circuit, what is 1 'and' 1? a) 0 b) 4 c) 2 d) 1

7) In a Digital circuit, what is 1 'and' 0? a) 0 b) 4 c) 2 d) 1

8) In a Digital circuit, what is 1 'or' 0? a) 0 b) 4 c) 2 d) 1

9) In a Digital circuit, what is 0 'or' 0? a) 0 b) 4 c) 2 d) 1

10) Which resistive component is designed to be temperature sensitive?

a) Thermistor b) Rheostat c) Potentiometer d) Photodiode

11) What are the unit and symbol for current?

a) Ampere, A b) Coulomb, I c) Ampere, Q d) Ampere, I

12) If this circuit were used in a digital circuit, it would be a NOT gate.

A. True B. False C. no idea

14) Name the electronic components represented by each of the following symbols.

15) Explain the following figure. What is it, what does it do?

16) How does the electronic circuit below work?

HORIZON INTERNATIONAL BILINGUAL SCHOOL 45min PHYSICS MIDTERM EXAM 11.Grade

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17) What type of component:

a stores charge for a short time ……………..b changes its resistance when the temperature changes …………..c controls current and voltage ……………d acts as a switch and amplifier? ………………….

18) What do each of the following stand for?

a LED ……………….b kΩ …………c LDR ………….d µF ……………e IC …………….19) Which one of the following statements is not true for the transistor in figure?

20)

23) Figure below shows a control system (brain) which is used in an automatic washing machine.

i)Which part of the system forms the control circuit?ii) What conditions will stop the washing machine working?iii) which condition will start the washing machine working?