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4

What is the total capacitance of 10 capacitorsa each of 20 F in series?

A. 200 F

B. 2 F

C. 100 F

D. 0.5 F

Correct Answer :

B. 2 F


Related Questions

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4

The admittance of a parallel RLC circuit is found to be the ___ sum of conductance and susceptances.

A. Algebraic

B. Arithmetic

C. Vector

D. Phasor

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What is the most convenient way of achieving large capacitance?

A. By using multiplate construction

B. By using air as dielectric

C. By decreasing distance between plates

D. By using dielectric of low permittivity

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4

What is the reciprocal of capacitance?

A. Reluctance

B. Susceptance

C. Elastance

D. Conductance

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4

The average value of a triangular or sawtooth wave is _____ times its peak value.

A.

B.

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4

What is the total capacitance of 10 capacitorsa each of 20 F in series?

A. 200 F

B. 2 F

C. 100 F

D. 0.5 F

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4

What maximum voltage can be applied across the capacitor of time?

A. Working voltage

B. Surge voltage

C. Stray voltage

D. Peak voltage

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4

The reason why electrical appliances are connected in parallel.

A. It is a simple circuit

B. This makes the operation of appliances independent with each other

C. This results in reduced power consumption

D. All of the above

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4

The ratio between the reactive power and the apparent power of an ac load is called

A. Quality factor

B. Power factor

C. Power ratio

D. Reactive power

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4

What is the reciprocal of quality factor?

A. Power factor

B. Reactive factor

C. Dissipation factor

D. 1/Q factor

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4

The ratio of maximum value to the effective value of an alternating quantity is called

A. Form factor

B. Peak factor

C. Dynamic factor

D. Leakage factor

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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

The area of capacitor plates increases two timesa then its capacitance

A. Increases two times

B. Increases four times

C. Decreases two times

D. Decreases four times

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4

The charge in the capacitor is stored at the

A. Terminals

B. Plates

C. Dielectric

D. Air

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4

An inductor carries 2 A dc. If its inductance is 100 Ha then what is its inductive reactance?

A. Zero

B. 1.3 k

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4

What is the temperature coefficient of the resistance Eureka?

A. Infinity

B. Negative

C. Almost zero

D. Positive

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4

Form its definitiona the unit of electric fielda is the N/C and equivalent unit of is the

A. V(m)2

B. V(m)

C. V/m2

D. V/m

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4

In an RL series circuita

A. Current lags voltage by less than 90�

B. Current lags voltage by 180�

C. Current lags voltage by 90�

D. Current leads voltage by 90�

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4

The temperature-resistance coefficient of pure gold is

A.

B.

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4

For greater accuracya the value of phase angle should be determined from

A. Cos

B. Tan

C. Sin

D. Sec

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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

If the capacitance of mica capacitor is 5 times the capacitcitora then the relative permittivity of mica is

A.

B.

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4

When two in-phase sine waves that have identical frequency and amplitude are added togethera then the result is a sine wave with ___ the amplitude of either.

A. Half

B. Twice

C. Four times

D. One-fourth

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4

A tank circuit is a

A. Parallel LC circuit

B. Series LCcircuit

C. A resonant circuit

D. A non-resonant circuit

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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

Which factor does not affect resistance?

A. Length

B. Resistivity

C. Cross-sectional area

D. Mass

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4

When resistance are connected in parallela the total resistance is

A. Less than the smallest resistance in the connection

B. Greater than the smallest resistance in the connection

C. Between the smallest and greatest resistance in the connection

D. Increasing and decreasing depending upon the supply voltage

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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

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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

An impedance given by 90 -45� is a/an ___ impedance.

A. Inductive

B. Conductive

C. Resistive

D. Capacitive

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4

The potential gradient in a cable is maximum in

A. Conductor

B. Outer sheath

C. Insulation

D. Uniformly all over