Home
Current Affairs January 2024

What is the correct answer?

4

Under the conditions of maximum power transfera a voltage source is delivering a power of 15 W to the load. What is the power generated by the source?

A. 60 W

B. 30 W

C. 15 W

D. 4 W

Correct Answer :

B. 30 W


Related Questions

What is the correct answer?

4

For a parallel ACcircuita ___ is used as a reference phasor.

A. Voltage

B. Power

C. Current

D. Resistance

What is the correct answer?

4

In a circuita an active element is one which

A. Supplies energy

B. Receives energy

C. Both supplies and receives energy

D. Amplifies signal

What is the correct answer?

4

Which of the following capacitors are used only in dc circuits?

A. Mica

B. Ceramic

C. Mylar

D. Electrolytic

What is the correct answer?

4

At what frequency will an inductor of 5mH have the same reactance as a capacitor of 0.1 F?

A. 7.12 kHz

B. 7.12 Hz

C. 7.12MHz

D. 7.12 GHz

What is the correct answer?

4

Which of the following is a way of decreasing mutual inductance?

A. Moving the coils closer

B. Moving the coils apart

C. Decreasing the number of turns of either coil

D. Increasing the number of turns of either coil

What is the correct answer?

4

The current is ____ times the maximum current at half-power points of a resonance curve.

A.

B.

What is the correct answer?

4

What is the reciprocal of quality factor?

A. Power factor

B. Reactive factor

C. Dissipation factor

D. 1/Q factor

What is the correct answer?

4

In a resonant circuita if Q ? 10 resonant frequency _______ bandwidth.

A. Bisects

B. Exceeds

C. Is less than

D. Is equal to

What is the correct answer?

4

Which of the following is the peakiest?

A. Square wave

B. Sinusoidal wave

C. Triangular wave

D. Rectangular wave

What is the correct answer?

4

A circuit whose parameters change with voltage or current.

A. Non-linear circuit

B. Linear circuit

C. Complex circuit

D. Passive circuit

What is the correct answer?

4

What is the temperature coefficient of the resistance Eureka?

A. Infinity

B. Negative

C. Almost zero

D. Positive

What is the correct answer?

4

A three-by-threea series-parallel matrix of resistorsa all having the same ohmic valuea would have a net resistance of

A. One-third the value of a single resistor

B. Three times the value of a single resistor

C. The same value as a single resistor

D. Nine times the value of a single resistor

What is the correct answer?

4

When the temperature of copper wire is increased its resistance is

A. Increased

B. Decreased

C. Constant

D. Zero

What is the correct answer?

4

The value of temperature coefficient ( ) is dependent upon

A. The nature of material and temperature

B. The length of material

C. The cross-sectional area of the material

D. The volume of the material

What is the correct answer?

4

In a circuita a passive element is one which

A. Supplies energy

B. Receives energy

C. Both supplies and receives energy

D. Attenuates signal

What is the correct answer?

4

Which one of the following elements serves as a protection against overload?

A. Fuse

B. Switch

C. Resistor

D. Relay

What is the correct answer?

4

The maximum power transfer theorem is used in

A. Power system

B. Electronic system

C. Refrigeration

D. Air conditioning

What is the correct answer?

4

A neon glow lamp used as a night light ionizes at approximately

A. 70 V

B. 80 V

C. 90 V

D. 100 V

What is the correct answer?

4

What is the purpose of a load in an electric circuit?

A. To increase the circuit current

B. To decrease the circuit current

C. To utilize electrical energy

D. To make the circuit complete

What is the correct answer?

4

Which of the following dielectric materials makes the lowest-capacitance capacitor?

A. Paper

B. Mica

C. Air

D. Electrolyte

What is the correct answer?

4

Norton�s theorem is ____ Thevenin�s theorem.

A. The same as

B. The converse of

C. Older that

D. More accurate than

What is the correct answer?

4

What is the reading of an ohmmeter for a shorted capacitor?

A. Zero

B. Infinity

C. k

D. M

What is the correct answer?

4

At parallel resonancea the currents flowing through L and C are

A. Infinite

B. Zero

C. Unequal

D. Equal

What is the correct answer?

4

In a series RLCcircuit

A. The current lags VLby 90�

B. The current leads VLby 90�

C. XL leads Xcby 90�

D. Z = jXL at resonance

What is the correct answer?

4

For maximum power transfera what is the relation between load resistance RL and internal resistance R of the voltage source?

A. RL= 2 r

B. RL= 1.5 r

C. RL= r

D. RL= 3 r

What is the correct answer?

4

Barium-strontium titanite dielectric material is also called

A. Ceramic

B. Polyster

C. Electrolytic

D. Bakelite

What is the correct answer?

4

Which of the following is not a factor affecting capacitance oor?

A. Area of plates

B. Number of plates

C. Distance between plates

D. Dielectric material used

What is the correct answer?

4

Which of the following does not refer to electrical energy?

A. Volt-ampere

B. Joule

C. Watt-second

D. Volt-coulomb

What is the correct answer?

4

What is the resonant frequency of a circuit when L of 3 microhenrys and C of 40 picofarads are in series?

A. 14.5 kHz

B. 145 MHz

C. 14.5 MHz

D. 145 kHz

What is the correct answer?

4

What value of R is needed with a 0.05 F Cfor an RCtime constant of 0.02 s?

A.

B. 400 M

C. 400 G

D. 400 k