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Worksheets

Electronics Quiz

Total questions: 35

Worksheet time: 18mins

Name
Class
Date
1.

What is the unit of capacitance?

a)

Henry

b)

Farad

c)

Ohm

d)

Volt

2.

A 10µF capacitor is connected to a 12V source. What is the charge stored?

a)

120µC

b)

12µC

c)

1.2mC

d)

120mC

3.

Capacitors in parallel result in:

a)

Increased total capacitance

b)

Decreased total capacitance

c)

No change in capacitance

d)

Zero capacitance

4.

Ohm's Law states:

a)

The current is directly proportional to the resistance and inversely proportional to the voltage.

b)

The current is directly proportional to the voltage and inversely proportional to the resistance

c)

The voltage is directly proportional to the resistance and inversely proportional to the current.

d)

The voltage is directly proportional to the current and inversely proportional to the square of the resistance.

5.

If a resistor of 4Ω has a current of 2A flowing through it, what is the voltage across it?

a)

2V

b)

4V

c)

8V

d)

16V

6.

A 10Ω resistor dissipates 20W of power. What is the current?

a)

2A

b)

4A

c)

10A

d)

5A

7.

Which is an example of a semiconductor?

a)

Copper

b)

Silicon

c)

Iron

d)

Platinum

8.

In an N-type semiconductor, the majority carriers are:

a)

Holes

b)

Electrons

c)

Neutrons

d)

Protons

9.

The process of adding impurities to a pure semiconductor is called:

a)

Doping

b)

Rectification

c)

Amplification

d)

Biasing

10.

What is the typical forward voltage drop of a silicon diode?

a)

0.3V

b)

0.7V

c)

1.1V

d)

2V

11.

What is the main purpose of a Zener diode?

a)

Amplification

b)

Voltage regulation

c)

AC to DC conversion

d)

Signal modulation

12.

A diode's reverse breakdown voltage is used in:

a)

Forward bias

b)

Reverse bias

c)

No bias

d)

Both forward and reverse bias

13.

The SI unit of inductance is:

a)

Farad

b)

Tesla

c)

Henry

d)

Ohm

14.

What is the formula for the inductive reactance of a coil?

a)

XL=12πfLX_L=\frac{1}{2\pi fL}

b)

XL=2πfLX_L=2\pi fL

c)

XL=L2πfX_L=\frac{L}{2\pi f}

d)

XL=f2πLX_L=\frac{f}{2\pi L}

15.

If an inductor of 4H experiences a current change of 3A in 2s, what is the induced emf?

a)

12V

b)

6V

c)

2V

d)

8V

16.

What is the reciprocal of resistance?

a)

Conductance

b)

Reactance

c)

Inductance

d)

Capacitance

17.

A wire of resistance 5Ω is stretched to double its length. What will be its new resistance?

a)

5Ω

b)

10Ω

c)

20Ω

d)

25Ω

18.

If three resistors of 5Ω, 10Ω, and 15Ω are connected in parallel, what is the equivalent resistance?

a)

30Ω

b)

4.29Ω

c)

1.5Ω

d)

10Ω

19.

What is the main purpose of an amplifier?

a)

Signal rectification

b)

Signal amplification

c)

Voltage regulation

d)

Oscillation generation

20.

If an amplifier has a voltage gain of 100 and an input of 0.1V, what is the output voltage?

a)

1V

b)

10V

c)

100V

d)

1000V

21.

What is the primary advantage of LEDs over incandescent bulbs?

a)

Higher power consumption

b)

Lower efficiency

c)

Longer lifespan

d)

Less brightness

22.

The typical forward voltage for a blue LED is:

a)

0.7V

b)

1.8V

c)

3.3V

d)

5V

23.

Which microcontroller is widely used in basic embedded systems?

a)

8086

b)

8051

c)

ARM Cortex-A72

d)

PIC32

24.

A microcontroller is best suited for:

a)

High-performance computing

b)

Embedded applications

c)

General-purpose processing

d)

Graphics rendering

25.

An oscillator generates:

a)

DC signals

b)

AC signals

c)

Random signals

d)

Constant resistance

26.

Which component determines the frequency of an oscillator?

a)

Diode

b)

Capacitor

c)

Resistor

d)

Both b and c

27.

What is the unit of battery capacity?

a)

Volt

b)

Watt-hour

c)

Ampere-hour

d)

Ohm

28.

Which type of battery is commonly used in electric vehicles?

a)

Lithium-ion

b)

Lead-acid

c)

Nickel-cadmium

d)

Zinc-carbon

29.

A 12V battery supplies 3A of current. What is the power delivered?

a)

36W

b)

4W

c)

15W

d)

50W

30.

A resistor of 8Ω is connected to a 16V source. What is the current?

a)

0.5A

b)

2A

c)

4A

d)

8A

31.

Which of the following improves the conductivity of semiconductors?

a)

Increasing temperature

b)

Decreasing temperature

c)

Removing impurities

d)

Adding doping material

32.

What is the primary material used for making LEDs?

a)

Silicon

b)

Germanium

c)

Gallium arsenide

d)

Zinc

33.

Which type of oscillator uses a quartz crystal?

a)

Hartley

b)

Colpitts

c)

Crystal oscillator

d)

Phase-shift

34.

A 6V battery is connected to a 12Ω resistor. What is the current?

a)

0.5A

b)

1A

c)

2A

d)

12A

35.

The capacitance of two capacitors in series is given as:

a)

Sum of individual capacitances

b)

Product of individual capacitances divided by their sum

c)

Difference of capacitances

d)

Product of individual capacitances

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