Chapter 1 · MCQ Read Mode

Concept of Basic Electrical and Electronics Engineering

Ohm’s law relates voltage and current through the:

The SI unit of electric charge is the:

For three equal resistors R connected in delta, the equivalent star resistance per arm is:

In a parallel circuit, the quantity common to all branches is:

Copper is classified as a:

A non-linear circuit element is one that:

Three 9 Ω resistors connected in delta give an equivalent star resistance per arm of:

Electrical energy is billed commercially in units of:

A circuit element that conducts equally well in both directions is called:

According to KVL, the algebraic sum of voltages around a closed loop is:

Superposition theorem is applicable only to:

Thevenin’s equivalent circuit consists of a voltage source in series with a:

Norton’s theorem represents a network as a current source in parallel with a:

Maximum power is transferred to the load when the load resistance equals the:

In an R-L series circuit, the current:

The phase angle of an R-C series circuit is given by:

At series resonance, the circuit impedance is:

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

The quality factor Q of a series RLC circuit is given by:

Active (real) power in an AC circuit is measured in:

AC voltage is generated based on:

The RMS value of a sinusoidal voltage with peak Vm is:

The average value of a full sine wave over one complete cycle is:

The form factor of a sinusoidal waveform equals:

In a balanced star-connected 3-phase system with phase voltage 230 V, the line voltage is approximately:

In a delta connection, the phase difference between line current and phase current is:

The peak factor (crest factor) of a sine wave is defined as:

The standard power supply frequency used in Nepal is:

Star connection is preferred for long-distance power transmission mainly because it provides:

In a delta-connected system, the relationship between line and phase voltage is:

A semiconductor diode conducts significant current when forward biased beyond:

In reverse bias, a diode ideally allows:

The Common Emitter (CE) BJT configuration is most widely used because it offers:

The Common Collector (CC) configuration, also called an emitter follower, has a voltage gain of approximately:

Voltage-divider (self) bias is preferred in BJT circuits mainly because it provides:

A small-signal model of a transistor is used when:

A MOSFET is fundamentally a:

An enhancement-mode MOSFET has a conducting channel:

CMOS technology is valued in digital ICs primarily for its:

The gate terminal of a MOSFET is characterized by:

The Barkhausen criterion for sustained oscillation requires the loop gain magnitude to be:

An oscillator generates a periodic output using:

RC oscillators (e.g. Wien bridge, phase-shift) are typically used for generating frequencies in the:

LC oscillators such as Hartley and Colpitts are typically used for:

The Hartley oscillator uses which feedback network configuration?

The Colpitts oscillator uses which feedback network configuration?

Crystal oscillators are preferred where high frequency stability is essential because:

A 555 timer IC configured as an astable multivibrator is commonly used to generate:

A function generator, as a laboratory instrument, is capable of producing:

For sustained (steady-amplitude) oscillation, the total phase shift around the feedback loop must equal:

A Class A amplifier output stage conducts for:

The main drawback of a Class B push-pull amplifier is:

Class AB biasing is used mainly to:

The theoretical maximum efficiency of a Class B amplifier is approximately:

A transformer-coupled push-pull output stage is valued because it:

Power BJTs require careful heat-sinking primarily to avoid:

A tuned amplifier achieves high gain over a narrow frequency band by using:

An ideal operational amplifier is characterized by:

The 'virtual short' concept in op-amp analysis applies when:

A voltage follower (buffer) op-amp configuration provides:

At DC steady state, an inductor behaves as a(n):

At DC steady state, a capacitor behaves as a(n):

The time constant of a series R-L circuit is:

The time constant of a series R-C circuit is:

A transient is considered practically complete after about:

In a series RLC circuit, the damping factor α is given by:

The undamped natural frequency of a series RLC circuit is:

If α > ω₀ in a series RLC circuit, the response is:

A critically damped response occurs when:

During capacitor charging through a resistor from DC source V, the current at t = 0⁺ is:

The roots of the numerator polynomial of a network function are called:

The roots of the denominator polynomial of a network function are called:

For a stable network, all poles of the transfer function must lie in the:

Z-parameters are also known as:

Y-parameters are obtained by:

For a reciprocal two-port network, the Z-parameters satisfy:

ABCD (transmission) parameters are most useful for analyzing networks connected in:

Hybrid (h) parameters are commonly used to model:

When two two-port networks are connected in series, the overall parameters are found by adding:

A one-port network is fully characterized by its driving-point:

A polynomial is called Hurwitz if all its roots lie in the:

A necessary condition for a polynomial to be Hurwitz is that all its coefficients must be:

The driving-point impedance of any passive RLC network must be a:

For a positive real function F(s), Re[F(jω)] must be:

The Foster I form realizes the driving-point impedance as a:

The Foster II form realizes the driving-point admittance as a:

The Cauer I form is obtained by a continued-fraction expansion that removes the pole at:

In an LC driving-point impedance function, the poles and zeros:

For an RC driving-point impedance, the critical frequency nearest the origin is always a:

A network consisting of alternating series and shunt elements along the signal path is called a:

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?