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

1) What does LED stand for?

a) Light Emitting Display b) Low Energy Display c) Light Emitting Diode d) Light Emitting Detector 2) Name the three leads of a common transistor a) Collector Bias Omitter b) Base Collector Case c) 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 for A. Light dependant resistor B. Long dependant resistor C. 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?

21)

22)

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 k c LDR . d F 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?