Applied Electricity

Question 1

1A transistor has β = 100 and base current 20 μA. The collector current is

Hard

A. 20 mA B. 2 mA C. 200 μA D. 0.2 mA

Question 2

2A diode allows current to flow

Easy

A. in one direction only B. in both directions C. only when cold D. never

Question 3

3A common-emitter amplifier produces an output that is

Hard

A. inverted relative to the input B. zero C. DC only D. in phase

Question 4

4A transistor has three terminals: emitter, base and

Hard

A. cathode B. collector C. anode D. gate

Question 5

5The three regions of a bipolar transistor are

Easy

A. gate, drain and source B. live, neutral and earth C. anode and cathode only D. emitter, base and collector

Question 6

6A semiconductor device that allows current to flow in one direction only is a

Easy

A. diode B. inductor C. resistor D. capacitor

Question 7

7A Zener diode is used mainly for

Easy

A. light emission B. amplification C. storage D. voltage regulation

Question 8

8A circuit that converts AC to DC is a

Easy

A. oscillator B. amplifier C. rectifier D. inverter

Question 9

9A forward-biased silicon diode has a voltage drop of about

Easy

A. 5 V B. 0.7 V C. 0.1 V D. 12 V

Question 10

10A light-dependent resistor has

Easy

A. constant resistance B. low resistance in bright light C. high resistance in bright light D. no resistance