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4

If one resistance in a series connection is opena then

A. The current is zero in all the other resistances

B. The current is maximum in all the other resistances

C. The voltage is zero across the open resistance

D. The voltage is infinite across the open resistance

Correct Answer :

A. The current is zero in all the other resistances


Related Questions

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4

Which of the statements below is not true?

A. Current source is an active element

B. Resistor is a linear element

C. Voltage source is a passive element

D. Diode is a non-linear element

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4

A term used to express the amount of electrical energy stored in electrostatic field.

A. Joules

B. Coulombs

C. Watts

D. Electron-volt

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4

What is the most common non-sinusoidal waveform?

A. Square wave

B. Triangular wave

C. Trapezoidal wave

D. Sawtooth wave

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4

³Any resistance R in a branch of a network in which a current I is flowing can be replaced by a voltage equal to IR�. This states

A. Compensation theorem

B. Reciprocity theorem

C. Millman�s theorem

D. Superposition theorem

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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

Which of the following does not generally affect the value of a capacitor?

A. The dielectric material used

B. The surface area of the plates

C. The thickness of the dielectric

D. The voltage applied to the plate

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4

It is impossible to change the voltage across a capacitor instantlya as this would produce ___ current.

A. Infinite

B. Zero

C. Low

D. High

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4

The capacitance of a capacitor is ___ relative permittivity.

A. Directly proportional to

B. Inversely proportional to

C. Equal to

D. Inversely proportional to the square of

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4

Which of the following is also known as antiresonant circuit?

A. Parallel resonant circuit

B. Series resonant circuit

C. Tuned circuit

D. Tank circuit

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4

When the power factor of a circuit is zeroa

A. Power absorbed is maximum

B. Power absorbed is minimum

C. Power absorbed is zero

D. The impedance is minimum

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4

A trimmer is a variable capacitor in which capacitance is varied by changing the

A. Number of plates

B. Dielectric

C. Distance between plates

D. Plate area

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4

The reason why electrical appliances are not connected in series.

A. Greater electrical power saving

B. Power loss is minimum

C. Appliances have different current ratings

D. All of the above

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4

Capacitance increase with

A. Larger plate area and less distance between plates

B. Larger plate area and greater distance between plates

C. Smaller plate area and less distance between plates

D. Higher values of applied voltage

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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

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

A. Inductive

B. Conductive

C. Resistive

D. Capacitive

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4

The unit of elastance is

A. Farad

B. Daraf

C. Siemen

D. Henry

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4

Which of the following is not a factor affecting dielectric strength?

A. Mass

B. Moisture content

C. Temperature

D. Thickness

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4

An open resistor when checked with an ohmmeter reads

A. Zero

B. Infinite

C. High but within the tolerance

D. Low but not zero

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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

The result of rust in electrical (wire) connection is

A. Inductance

B. Conductance

C. Impedance

D. Resistance

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4

The temperature-resistance coefficient of pure gold is

A.

B.

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4

What rating of a resistor determines its ability to absorb heat?

A. Wattage

B. Ohmic

C. Current

D. Voltage

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4

What is the value of a carbon composition resistor with the following color code: Browna whitea orangea red

A. 190 ; 10 %

B. 19 k ; 2 %

C. 19 k ; 20 %

D. 1.9 k ; 2 %

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4

An open inductor has

A. Zero resistance and infinite inductance

B. Infinite resistance and zero inductance

C. Infinite resistance and infinite inductance

D. Zero resistance and zero inductance

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4

For series capacitorsa total charge is

A. The sum of individual charges

B. Equal to the charge of either capacitors

C. Equal to the product of the charges

D. The quotient of the charges

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4

What is the resonant frequency of a circuit when L of 25 microhenrys and C of 10 picofarads are in parallel?

A. 10.1 kHz

B. 10.1 MHz

C. 101 MHz

D. 101 kHz

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4

What is a closed path made of several branches of the network called?

A. Junction

B. Node

C. Terminal

D. Loop

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4

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

A. Paper

B. Mica

C. Air

D. Electrolyte

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4

The power factor of a certain circuit in which the voltage lags behind the current is 80 %. To increase the power to 100 %a it is necessary to add ___ to the circuit.

A. Inductance

B. Capacitance

C. Resistance

D. Impedance

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4

The graph between an alternating quantity and time is called

A. Sine wave

B. Curve

C. Waveform

D. A plot