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Current Affairs January 2024

What is the correct answer?

4

In a series circuit with unequal resistances the

A. Highest R has the highest V

B. Lowest R has the highest V

C. Lowest R has the highest I

D. Highest R has the highest I

Correct Answer :

A. Highest R has the highest V


Related Questions

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4

A series RL circuit has R of 10 and XL of 5 a its impedance in rectangular form is given by

A. 10 +j 5

B. 10 + j 10

C. 10 ± j 5

D. 10 ± j 10

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4

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

A. Fuse

B. Switch

C. Resistor

D. Relay

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4

When frequency of an ac wave decreasesa the value of XLin a coil

A. Approaches zero

B. Gets larger positively

C. Gets larger negatively

D. Stays constant

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4

High resistance values are a consequence of the ___ of the film.

A. Thickness

B. Length

C. Thinness

D. Area

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4

Which of the following is the statement of Ohm�s law?

A. Electric current is directly proportional to both voltage and resistance

B. Electric current varies directly as the voltage and inversely as the resistance

C. Electrical power is directly proportional to the resistance and inversely as the current squared

D. Electrical power is directly proportional to both voltage squared and the resistance

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4

What determines the magnitude of electric current?

A. The rate at which electrons are produced

B. The type of material used

C. The current carrying capacity of the circuit

D. The rate at which electrons pass a given point

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4

Which of the following has negative temperature coefficient?

A. Carbon

B. Nickel

C. Brass

D. Constantan

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4

In an ac wavea 30 degrees of phase is ___ of a cycle.

A. ½

B.

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4

If a coil has a Q of 10a it means that

A. The energy stored in the magnetic field of the coil is 10 times the energy wasted in its resistance

B. The energy wasted in its resistance is 10 times the energy stored in the magnetic field of the coil

C. It is a low Q coil

D. It is a high Q coil

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4

What refers to the lowest voltage across any insulator that can cause current flow?

A. Conduction voltage

B. Critical voltage

C. Breakdown voltage

D. Voltage capacity

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4

In a series RLCcircuit

A. Increasing the frequency decreases the resistance

B. Increasing the frequency increases the resistance

C. Both XLand XCchange as frequency changes

D. Impedance will always decrease

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4

What increases the resistance of wire at high frequencies?

A. Temperature

B. Voltage

C. Skin effect

D. Insulation

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4

What is expected when two 20 k a 1 watt resistor in parallel are use instead of one 10 k a 1 watt?

A. Provides higher current

B. Provides less power

C. Provides more power

D. Provides wider tolerance

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4

What is considered as the most important value of a sine wave?

A. Effective value

B. Peak value

C. Average value

D. Instantaneous value

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4

Which of the following conditions is not true for a series RLCcircuit at resonance?

A. Z = jXL

B. XL= XC

C. The power factor is one

D. The magnitude of Z is

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4

A capacitor is used to

A. Block dc current

B. Pass dc current

C. Open voltage source

D. Short the voltage source

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4

In a series circuit with unequal resistances the

A. Highest R has the highest V

B. Lowest R has the highest V

C. Lowest R has the highest I

D. Highest R has the highest I

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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

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4

Two capacitors of capacitance 9 F and 18 F in series will have a total capacitance of

A. 27 F

B. 162 F

C. 6 F

D. 180 F

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4

Property of an electric circuit that dissipates electric energy

A. Reactance

B. Impedance

C. Resistance

D. Conductance

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4

For multi-plate capacitora capacitance is proportional to

A. Number of plates less one(n ± 1)

B. Number of plates plus one(n + 1)

C. Number of plates less two(n - 2)

D. Number of plates (n)

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4

The second strip of an electronic resistor color-code represents

A. The multiplier

B. The second digit of the value

C. The temperature

D. The tolerance

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4

The capacitor opposes any change in voltage across it by

A. Passing a voltage proportional to the rate of change of current

B. Acting as a short circuit at time equal to zero

C. Passing a current proportional to the rate of change of voltage

D. Acting as a short circuit at time equal to infinity

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4

A capacitor consists of two

A. Conductors only

B. Dielectric only

C. Conductors separated by a dielectric

D. Dielectric separated by a conductor

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4

A 0.09 microfarad capacitor is charged to 220 volts. How long in milliseconds will it discharged resistor has a resistance of 20a000 ohms?

A.

B.

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4

In an ac circuit with a resistive branch and an inductive branch in parallela the

A. Voltage across the inductance leads the voltage across the resistance by 90°

B. Resistive branch current is 90° out of phase with the inductive branch current

C. Resistive and inductive branch currents have the same phase

D. Resistive and inductive branch currents are 180° outof-phase

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4

A lead conductor has a resistance of 25 at 0 �C. Determine its resistance at -30 �C

A.

B.

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4

The electric field strength between capacitor plates has a unit

A. Volts per meter

B. Volts per mil

C. Amperes per meter

D. Amperes per mil

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4

An inductance of 1 mH is

A. 0.001 H

B. 0.01 H

C. 0.0001 H

D. 0.10 H

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4

Which of the following elements is active?

A. Resistor

B. Inductor

C. Capacitor

D. Ideal voltage source