The unit of resistance is:

• Ampere

• Volt

• Ohm

• Farad

Answer explanation

The unit of resistance is the Ohm, which measures how much a material opposes the flow of electric current. Ampere measures current, Volt measures voltage, and Farad measures capacitance.

A diode conducts current in:

• Both directions

• Forward direction only

• Reverse direction only

• None

Answer explanation

A diode allows current to flow in the forward direction only, meaning it conducts when the anode is more positive than the cathode. In reverse direction, it blocks current, making 'Forward direction only' the correct choice.

The device used to amplify weak signals:

• Resistor

• Amplifier

• Diode

• Capacitor

Answer explanation

An amplifier is specifically designed to increase the strength of weak signals, making it the correct choice. Resistors, diodes, and capacitors serve different functions in electronic circuits.

A capacitor stores:

• Energy

• Current

• Resistance

• None

Answer explanation

A capacitor stores energy in the form of an electric field when voltage is applied across its plates. It does not store current or resistance, making 'Energy' the correct choice.

Transistor is used as:

• Amplifier and switch

• Only resistor

• Only rectifier

• Filter

Answer explanation

Transistors are versatile components used primarily as amplifiers to increase signal strength and as switches to control electrical signals. Thus, the correct answer is 'Amplifier and switch'.

The transistor consists of:

• Two p-n junctions

• One junction

• Four junctions

• None

Answer explanation

A transistor is made up of two p-n junctions, which are essential for its operation. These junctions allow the transistor to control current flow, making it a fundamental component in electronic devices.

The basic logic gate which inverts input:

• AND

• OR

• NOT

• NOR

Answer explanation

The NOT gate is a basic logic gate that inverts its input. If the input is true, the output is false, and vice versa. This characteristic makes it the correct answer to the question.

Boolean 1 + 1 equals:

• 0

• 1

• 2

• None

Answer explanation

In Boolean algebra, 1 + 1 equals 0 due to the modulo 2 arithmetic. Thus, the correct answer is 0.

The binary of decimal 5 is:

• 1000

• 101

• 110

• 111

Answer explanation

The binary representation of decimal 5 is obtained by converting it to base 2. The correct binary for 5 is 101, as it consists of 1 four (2^2) and 1 one (2^0), making 101 the right choice.

A flip-flop stores:

• 1 bit

• 2 bits

• 4 bits

• 8 bits

Answer explanation

A flip-flop is a basic digital memory circuit that can store one bit of information. Therefore, the correct answer is 1 bit.