Free Printable TUTORIAL 5.3

1.

1. Diagram 35 shows an electronic symbol representing an electronic component.

a)

Diode

b)

Inductor

c)

Resistor

d)

Transistor

2.

What is the function of a diode?

a)

Acts as a current amplifier

b)

Acts as an automatic switch

c)

Stores electric charge

d)

Allows the current to pass in one direction only

3.

Diagram 28 shows a p-n junction diode. When the diode is reverse biased, the depletion layer widens because ...

a)

The electrons and holes are pulled away from the p-n junction

b)

The electrons from the n-type are pulled across the p-n junction

c)

The negative charges flow from the negative terminal to the p-type semiconductor

d)

The positive charges flow from the positive terminal to the n-type conductor

4.

Diagram 4 shows a full-wave rectifier. Which of the following is the correct path of the current through diodes K, L, M and N and resistor R?

a)

$L\ \rightarrow\ R\ \rightarrow\ N$

b)

$M\ \rightarrow\ R\ \rightarrow\ N$

c)

$K\ \rightarrow\ R\ \rightarrow\ M$

d)

$N\ \rightarrow\ R\ \rightarrow\ L$

5.

Diagram 6 shows a circuit which has three identical resistors P, Q and R, four diodes and an AC power supply.

Which resistor permitted only direct current (DC) through it?

a)

P

b)

R

c)

Q

d)

P, Q and R

6.

The function of the capacitor in diagram below is

a)

Rectifier

b)

Flows alternating current

c)

AC and DC filter

d)

Voltage smoother

7.

The diagram shows a circuit containing bulbs X, Y and Z.

Which bulb in the circuit will light up when the switch is on? (2003)

a)

Z

b)

X and Y

c)

Y and Z

d)

X,Y and Z

8.

Diagram 2 shows a rectification circuit for an AC current.

When an output resistor is connected to a CRO, the shape of the wave form on the screen is ....

a)

b)

c)

d)

9.

Diagram 5 shows a circuit of four diodes which are connected to batteries and a resistor. Which of the following is the correct path for the current?

a)

$L\rightarrow M\rightarrow T\rightarrow S\rightarrow U\rightarrow L\rightarrow M\rightarrow N\rightarrow O$

b)

$L\rightarrow M\rightarrow T\rightarrow R\rightarrow Q\rightarrow O\rightarrow N\rightarrow M\rightarrow L$

c)

$L\rightarrow M\rightarrow T\rightarrow R\rightarrow Q\rightarrow O\rightarrow N\rightarrow S\rightarrow U$

d)

$U\rightarrow S\rightarrow T\rightarrow R\rightarrow Q\rightarrow O\rightarrow N\rightarrow M\rightarrow L$

10.

Diagram 27 shows a full wave rectifier circuit.

The output of the wave form smoothen because...

a)

The resistance of the resistor is always increasing and decreasing

b)

The charges in the capacitor is always increasing and decreasing

c)

The number of electrons in the CRO is always increasing and decreasing

d)

The current flows through the diode is always increasing and decreasing

TUTORIAL 5.3

Total questions: 10

Worksheet time: 20mins

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