Chapter 1 · MCQ Read Mode

Fundamental of Electrical Engineering

Ohm's law states that, at constant temperature, the current through a conductor is:

Electrical power dissipated in a resistor can be expressed as:

A good electrical conductor is characterized by:

In a series circuit, which quantity remains the same through all elements?

In a parallel circuit, which quantity remains the same across all branches?

Star-delta (Y-Δ) conversion is primarily used to:

Kirchhoff's Current Law (KCL) is based on the principle of conservation of:

Kirchhoff's Voltage Law (KVL) is based on the principle of conservation of:

A circuit element whose V-I characteristic is a straight line through the origin is classified as:

A diode is an example of a:

The superposition theorem applies to circuits that are:

When applying superposition, an inactive voltage source is replaced by:

Thevenin's theorem replaces a linear two-terminal network with:

The Thevenin resistance Rᴛₕ is found by:

Norton's equivalent current source Iᴚ equals:

The relationship between the Thevenin and Norton equivalents is given by:

For maximum power transfer to a purely resistive load, the load resistance Rₗ must equal:

At the maximum power transfer condition (resistive case), the power transfer efficiency is:

For AC circuits with complex source impedance, maximum power transfer requires the load impedance to be:

Which theorem is NOT directly valid for computing power (as opposed to voltage/current) in a multi-source linear circuit?

An alternating EMF is generated in a coil primarily due to:

The instantaneous value of a sinusoidal voltage is expressed as v(t) =

The time period T of an alternating quantity is related to frequency f by:

For a pure sinusoidal waveform, the average value over a half-cycle equals:

The RMS value of a pure sinusoidal waveform equals:

The full-cycle average value of a pure sinusoidal AC quantity is:

Form factor of a sinusoidal waveform is defined as the ratio of:

Peak (crest) factor of a sinusoidal waveform is defined as the ratio of:

A 'cycle' of an alternating quantity refers to:

If the supply frequency is 50 Hz, the angular frequency ω is:

The transient response of a circuit refers to its behavior:

The time constant of an R-L circuit is given by:

The time constant of an R-C circuit is given by:

After one time constant, a first-order circuit's response has reached approximately what fraction of its total change?

A critically damped R-L-C circuit is characterized by:

An underdamped R-L-C circuit's response is characterized by:

An undamped R-L-C circuit (zero resistance, ideal) exhibits:

An overdamped R-L-C circuit's response reaches steady state:

The steady-state response of a circuit under sinusoidal AC excitation is:

A first-order transient is generally considered to have essentially decayed after approximately how many time constants?

Active (real) power in an AC circuit is given by:

Reactive power in an AC circuit is given by:

The relationship between apparent, active, and reactive power is:

A purely resistive load has a power factor of:

An inductive load typically has a power factor that is:

A low power factor for a given real power results in:

Power factor correction for an inductive (lagging) load is typically achieved by adding:

Series resonance in an R-L-C circuit occurs when:

At parallel resonance, the line current drawn from the source is:

The resonant frequency of a series or parallel R-L-C circuit is given by:

In a star-connected three-phase system, the line voltage relates to the phase voltage as:

In a delta-connected three-phase system, the line current relates to the phase current as:

A neutral conductor is available in which connection?

For a perfectly balanced three-phase load, the current in the neutral conductor is:

An unbalanced three-phase load causes:

Without a solidly connected neutral, an unbalanced star load can cause:

The total active power in a balanced three-phase system is given by:

The apparent power in a balanced three-phase system is given by:

In a delta connection, the phase voltage equals:

Which connection is typically preferred at the load end when both single-phase (line-to-neutral) and three-phase supply is required?

When a cylinder is unrolled (opened in rope form), what shape is formed?

How many transistors does a class B push-pull amplifier use?

In which region does a class B amplifier operate?

Which quantity remains constant (same) throughout a series circuit?

In a star (Y) connected three-phase system, what is the relationship between line voltage (Vₗ) and phase voltage (Vₚₕ)?

What is the primary advantage of CMOS logic technology?

What type of feedback do oscillators use to sustain oscillations?

Which theorem gives the condition for maximum power transfer from a source to a load?

According to Ohm's Law, which relationship is correct?

Three equal resistors in series dissipate 10 W. How much power do they dissipate when connected in parallel (same supply voltage)?

A semiconductor is primarily used for:

Two copper wires of the same length have cross-sectional area ratio 1 : 4. What is the ratio of their resistances (small : large)?

A wire has resistance 40 Ω. Another wire of the same length has 4× the cross-sectional area. What is the resistance of the second wire?

The Superposition Theorem is NOT applicable to which type of circuit analysis?

The current through a capacitor is known as:

A bridge rectifier operating at 50 Hz produces an output of:

An inductor and resistor are connected in series and a DC voltage V is applied. At steady state, what is the current?

Three resistors each of 2 Ω are connected in delta. What is the equivalent resistance between any two terminals?

A 1 Ω resistor is connected in parallel with a 3 Ω resistor. What is the equivalent resistance?

What is the Standing Wave Ratio (SWR) when the reflection coefficient is 0.8?

A transmission line has Z₀ = 50 Ω and termination impedance Za = 75 Ω. What is the SWR and reflection coefficient?