What does an electrical circuit require to function?

• Only a resistor

• Open circuit

• Power source and closed path

• Only a capacitor

What is the SI unit of electric current?

• Volt

• Watt

• Ohm

• Ampere

Which of the following is a characteristic of semiconductors?

• Zero resistance

• Always conductive

• Conductivity between conductors and insulators

• Cannot be used in circuits

What is the most common semiconductor material?

• Copper

• Iron

• Silicon

• Aluminium

Which device allows current in only one direction?

• Resistor

• Transistor

• Diode

• Capacitor

What is the application of a Zener Diode?

• Amplifier

• Oscillator

• Voltage regulator

• Current meter

Which of the following is a part of a basic instrumentation system?

• Battery

• Sensor

• Load

• Bulb

Which device converts a physical quantity to an electrical signal?

• Transistor

• Amplifier

• Sensor

• Diode

What does a digital system process?

• Continuous signals

• Only light signals

• Discrete signals (0 and 1)

• Audio signals

Which of the following is an example of a digital system?

• Fan

• Analog radio

• Computer

• Bulb