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Electronics Lab Viva 1

Total questions: 46

Worksheet time: 17mins

Name
Class
Date
1.

The name of this component:

a)

diode

b)

resistor

c)

capacitor

d)

transistor

2.

The name of this component:

a)

resistor

b)

capacitor

c)

photocell

d)

transistor

3.

The name of this component:

a)

diode

b)

555 timer

c)

resistor

d)

transistor

4.

The name of this component:

a)

photocell

b)

transistor

c)

potentiometer

d)

transistor

5.

The name of this component:

a)

transistor

b)

conductor

c)

555 timer

d)

potentiometer

6.

The name of this component:

a)

potentiometer

b)

photocell

c)

diode

d)

transistor

7.

The image is a symbol for a:

a)

transistor

b)

LED

c)

diode

d)

potentiometer

8.

The following is a symbol for a:

a)

LED

b)

photocell

c)

diode

d)

source

9.

The function of a transistor is:

a)

store electrical charge

b)

perform the function of an electronic switch

c)

control the direction of current

d)

control the amount of electrical current

10.

To use an LED, you need to connect it in a circuit with a...

a)

resistor

b)

capacitor

c)

transistor

d)

inductor

11.

To find the necessary resistor value we use...

a)

Thales theorem

b)

Ohm's law

c)

Pythagorean theorem

d)

Kirchhoff law

12.

...... is just a coil of wire.

a)

resistor

b)

inductor

c)

capacitor

d)

transistor

13.

A .......... is a component made up of two inductors

wound around the same magnetic core.

a)

transistor

b)

transformer

c)

transistor

14.

An .... circuit is any kind of circuit that is integrated onto a chip. It can be a radio transmitter, a microcontroller, an audio amplifier or any other circuit you can think of.

a)

integrated

b)

open

c)

disintegrated

d)

electronic

15.

Which electronic components can be polarized and non-polarized?

a)

resistors

b)

inductors

c)

capacitors

d)

transformers

16.

Sometimes you use this component for simple tasks like indicating that your circuit has power,

that the circuit is working or that the circuit has failed.

a)

battery

b)

resistor

c)

capacitor

d)

LED

17.

A ........... allows current to flow in only one direction

a)

Resistor

b)

LED

c)

Diode

d)

Capacitor

18.

The value of a capacitor is measured in - - - - - -

a)

Ohms

b)

Volts

c)

Amps

d)

Farads

19.

The dot on the microprocessor shows .....

a)

Pin 1

b)

Pin 48

c)

+ volts

d)

- volts

20.

The long leg on an LED denotes the

- - - - - - - - terminal.

a)

Negative

b)

Positive

c)

It doesn't matter

21.

What is the equivalent or total resistance (Re) across this circuit?

a)

3 kΩ

b)

10 kΩ

c)

13 kΩ

d)

18 kΩ

22.

Which wire will have the least resistance?

a)

10 cm

b)

20 cm

c)

30 cm

d)

40 cm

23.

Calculate the resistance.

a)
360 Ω ± 5%
b)
36 kΩ ± 5%
c)
36 Ω ± 5%
24.

Calculate the resistance.

a)
10 Ω ± 3%
b)
100 kΩ ± 4%
c)
10 kΩ ± 4%
25.

Tool used for removing wire insulation

a)

Tweezer

b)

Screw driver

c)

Pipe wrench

d)

None of the above

26.

What is the purpose of insulating a tool head?

a)

For better aesthetic look

b)

Protection against shock

c)

To avoid corrosion

d)

None of the above

27.

Why screwdriver handle is oval in shape?

a)

For better aesthetic look

b)

Oval cross section is an industrial standard

c)

to improve grip

d)

serves no purpose

28.

1N4001 is a

a)

LED

b)

transistor

c)

IC

d)

None of the above

29.

LED works on the principle of

a)

photoluminescence

b)

bioluminescence

c)

hypoluminescence

d)

electroluminescence

30.

An ideal diode has a forward resistance of

a)

infinity

b)

0 ohm

c)

50 ohm

d)

100 ohm

31.

Which of the following control knobs are not part of CRO?

a)

Current/div

b)

Intensity

c)

V/div

d)

time/div

32.

Turning the intensity knob of a CRO

a)

increases brightness

b)

increases v/div

c)

increases frequency

d)

none of the above

33.

What is the maximum voltage that can be applied using the power supply used in lab?

a)

45V

b)

30V

c)

18V

d)

20V

34.

The output of pin 3 of a 555 IC based LED blinking circuit is

a)

Square wave

b)

Sine wave

c)

Triangular wave

d)

Sawtooth wave

35.

Why a resistor is connected in series to pin 3 of a LED blinking circuit?

a)

to protect 555 IC

b)

to protect LED

c)

None of the above

d)

to protect power supply

36.

What happens to the output if 0.01uF capacitor is faulty?

a)

No change in output

b)

LED will stop blinking

c)

LED will blow due to overcurrent

d)

IC will get blown

37.

The value of R1 and R2 used in the design is

a)

1 Kohm

b)

100 ohm

c)

1oo Kohm

d)

10 Kohm

38.

The 8th and 1st pin of the IC is connected to

a)

To capacitor and Vcc

b)

Both to Vcc

c)

Ground and Vcc respectively

d)

Vcc and ground respectively

39.

The rating of soldering iron used in lab

a)

35 W

b)

25 W

c)

10 W

d)

15W

40.

Solder is

a)

60% tin 40% lead

b)

60% lead 40% tin

c)

70% tin 30% lead

d)

30% tin 70% lead

41.

Melting point of solder is

a)

100 degC

b)

180 degC

c)

190 degC

d)

220 degC

42.

Soldering flux is used to

a)

clean oxides from the surface

b)

clean rust from the surface

c)

all of the above

d)

none of the above

43.

Which among the following is a commonly used flux

a)

Zinc chloride

b)

Ammonium nitride

c)

Pottasium chloride

d)

Allo of the above

44.

The expansion of SPICE is

a)

Simulation Program with Integrated Circuit Emphasis

b)

Stimulation Program with Integrated Circuit Emphasis

c)

Salient Program for Integrated Circuit and Electronics

d)

Small Program for Integrated Circuit and Electronics

45.

Why is testing a simulation important?

a)

Saves money

b)

It's good fun

c)

Shows which components light up

46.

Shift + R in CAD performs

a)

Run operation

b)

Rotate operation

c)

Roll operation

d)

None of the above

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