Free Printable ELECTRONIC F5

1.

Figure shows a trace displayed on the screen of a C.R.O. The Y-gain is set to 5 V cm^-1 What is the peak voltage?

a)

0 V

b)

5 V

c)

20 V

d)

25 V

2.

Figure shows a bridge rectifier connected to a sinusoidal alternating voltage supply. A load resistor is connected across the output terminals P and Q. Which of the following traces would be displayed on the screen if a C.R.O. is connected across PQ?

a)

b)

c)

d)

3.

An n-type semiconductor is produced when some 0f the germanium atoms are replaced with

a)

divalent atoms

b)

trivalent atoms

c)

tetravalent atoms

d)

pentavalent atoms

4.

A capacitor is used to smooth out the output voltage of a half-wave rectifier. In which of the following circuits is the capacitor correctly connected?

a)

b)

c)

d)

5.

Figure shows an npn transistor connected in a circuit. Which of the following is true?

a)

$I_c>I_B>I_E$

b)

$I_E>I_C>I_B$

c)

$I_B>I_C>I_E$

d)

$I_C>I_E>I_B$

6.

The truth tables for two logic gates P and Q are shown in Table 4.2 and Table 4.3 respectively. When the output of P is connected to the input of Q, the resulting combination is equivalent to a single

a)

NOT gate

b)

OR gate

c)

NAND gate

d)

NOR gate

7.

Table 4.4 gives a truth table of a combination of logic gates. Which of the following combination yields this truth table?

a)

b)

c)

d)

8.

The diagram shows a circuit containing bulbs X, Y and Z. Which bulb in the circuit will light up when the switch is on

a)

A Z only

b)

B X and Y only

c)

C Y and Z only

d)

D X, Y and Z

9.

How many electrons are there in the outer most shell of Silicon

a)

5

b)

4

c)

3

d)

8

10.

what is a transistor?

a)

a current amplifier

b)

a rectifier

c)

a power supply

d)

an adder device

11.

What electronic component allows current to flow in one direction only?

a)

Resistor

b)

LED

c)

Didode

d)

Switch

12.

Electrons have a positive charge.

a)

True

b)

False

13.

The nucleus of an atom contains protons and?

a)

Electrons

b)

Neutrons

14.

How many electrons does Si contain? (click to see image)

a)

14

b)

28

c)

2

d)

4

15.

Who is this?

a)

Snow White

b)

Ella

c)

Anna

d)

Rapunzel

16.

What charge do electrons have?

a)

Positive

b)

Neutral

c)

Negative

17.

Who is this?

a)

Rihanna

b)

Beyonce

c)

Nicki Minaj

d)

Whitney Houston

18.

What is this?

a)

X-men logo

b)

Super star's shield

c)

Iron-Man's

d)

Captain America's Shield

19.

How many electrons can the third shell have?

a)

Two

b)

Eight

c)

Five

d)

Three

20.

The atomic number tells you...

a)

the number of protons

b)

the number of neutrons

c)

the number of electrons

ELECTRONIC F5

Total questions: 20

Worksheet time: 10mins

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