Electronics & Circuits Fundamentals

What is the symbol for a resistor in an electronic circuit?

• Triangle

• Circle

• Straight line

• Zigzag line

Calculate the resistance of a resistor with color bands: red, red, brown, gold.

• 240 ohms with a tolerance of ±5%

• 220 ohms with a tolerance of ±10%

• 220 ohms with a tolerance of ±5%

• 200 ohms with a tolerance of ±5%

If a circuit has a voltage of 12V and a resistance of 4 ohms, what is the current flowing through it?

• 2A

• 6A

• 4A

• 3A

What is the unit of resistance?

• Amps

• Ohms (Ω)

• Volts

• Joules

State Ohm's Law equation.

• V = R / I

• V = I ^ R

• V = R + I

• V = I * R

What is the purpose of a capacitor in an AC circuit?

• To generate heat in the circuit

• To convert AC to DC power

• To increase resistance in the circuit

• To store and release electrical energy, improve power factor correction, filter out noise, and block DC components while allowing AC signals to pass through.

If a circuit has a current of 2A flowing through it and a resistance of 5 ohms, what is the voltage across it?

• 10V

• 7V

• 12V

• 3V

Explain the concept of inductance in an AC circuit.

• Inductance is the ability of a capacitor to store energy in an AC circuit.

• Inductance is the measure of voltage drop across a diode in an AC circuit.

• Inductance in an AC circuit is the property of a coil that resists changes in current flow.

• Inductance is the resistance of a resistor in an AC circuit.