Fundamentals of Electronics for Grade 10

What is the basic unit of electric current?

• ohm

• watt

• volt

• ampere

State Ohm's Law and its formula.

• V = R / I

• I = V + R

• R = V - I

• V = I * R

How do you calculate the total resistance in a series circuit?

• R_total = R1 * R2 * R3 * ... * Rn

• R_total = R1 + R2 + R3 + ... + Rn

• R_total = 1/(1/R1 + 1/R2 + 1/R3 + ... + 1/Rn)

• R_total = R1 - R2 - R3 - ... - Rn

What is the function of a capacitor in a circuit?

• To measure current flow in a circuit.

• The function of a capacitor in a circuit is to store and release electrical energy.

• To convert AC to DC voltage.

• To amplify electrical signals in a circuit.

Explain the difference between series and parallel circuits.

• In series circuits, the voltage is divided among components, while in parallel circuits, the voltage remains the same across all components.

• Parallel circuits are always more efficient than series circuits regardless of the components used.

• Series circuits have multiple paths for current, while parallel circuits have a single path.

• Series circuits have a single path for current, while parallel circuits have multiple paths.

What is the role of a transistor in electronic circuits?

• To increase the resistance in a circuit.

• The role of a transistor in electronic circuits is to act as a switch or amplifier.

• To convert AC to DC voltage.

• To store electrical energy in a circuit.

How do you determine the equivalent capacitance in a parallel circuit?

• C_eq = 1/(1/C1 + 1/C2 + 1/C3 + ... + 1/Cn)

• C_eq = C1 - C2 - C3 - ... - Cn

• C_eq = C1 + C2 + C3 + ... + Cn

• C_eq = C1 * C2 * C3 * ... * Cn

What is the purpose of a resistor in an electrical circuit?

• To increase the overall voltage in a circuit.

• To limit current and control voltage in an electrical circuit.

• To store electrical energy for later use.

• To create a short circuit for testing purposes.

Describe the symbol for a transistor in engineering drawings.

• The symbol for a transistor is a triangle with four terminals: gate, source, drain, and body.

• A transistor is represented by a zigzag line with two terminals: input and output.

• A transistor symbol consists of a square with two terminals: source and drain.

• The symbol for a transistor includes a circle with three terminals: emitter, base, and collector, with an arrow indicating the type (NPN or PNP).

What is the significance of the power rating of a resistor?

• The power rating is used to measure the resistance value of the resistor.

• The power rating indicates the color code of the resistor.

• The power rating determines the physical size of the resistor.

• The power rating of a resistor signifies the maximum power it can handle safely.