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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

Correct Answer :

A. Joules


Related Questions

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4

The ___ of an alternating quantity is defined as the fractional part of a period or cycle through which the quantity has advanced from selected origin.

A. Phase

B. Frequency

C. Amplitude

D. Waveform

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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 factor does not affect resistance?

A. Length

B. Resistivity

C. Cross-sectional area

D. Mass

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4

A 5 F capacitor charge to 5V has a stored charge equal to

A. 1 c

B. 5 c

C. 25 C

D. 200 c

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4

In a rectangular wavea the form factor is

A.

B.

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4

The reciprocal of a complex number is

A. A complex number

B. A real number

C. An imaginary number

D. A whole number

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4

Which of the following is a common material used in wire-wound resistors?

A. Manganin

B. Carbon

C. Bronze

D. German silver wire

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4

In a complex resistance-reactance planea XLis represented

A. By an axis opposite the R axis

B. By an axis perpendicular to the XC axis

C. By an axis opposite the XCaxis

D. By an axis parallel to the R axis

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4

Delta to wye or wye to delta transformation technique is applied to a ___ network.

A. One-terminal

B. Two-terminal

C. Three-terminal

D. Complex

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4

For parallel 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

The usual load of a dc circuit is a/an

A. Resistor

B. Capacitor

C. Inductor

D. Both inductor and capacitor

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4

Which component opposes voltage change?

A. Resistor

B. Inductor

C. Capacitor

D. Transistor

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4

Rationalizing the denominator of a complex number means

A. Eliminating the j component in the denominator

B. Adding j component in the denominator

C. Eliminating the j component in the numerator

D. Adding j component in the numerator

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4

Metal tin becomes superconductor at approximately

A. 6 K

B. 3.7 K

C. 5 K

D. 4.7K

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4

In liquids and gasesa ionization current results from a flow of

A. Positive or negative ions

B. Free electrons

C. Ions that are lighter in weight than electrons

D. Protons

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4

What is the hot resistance of a 100 Wa 220 V incandescent lamp?

A.

B.

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4

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

A. Air

B. Barium-strontium titanite

C. Mica

D. Electrolyte

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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

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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

What is the total effective capacitance of two 0.25 F capacitors connected in series?

A. 0.125 F

B. 1.25 F

C. 0.50 F

D. 2.5 if

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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

Which waveform in which the rms value and the mean value are equal?

A. Square wave

B. Triangular wave

C. Sine wave

D. Sawtooth

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4

The mutual inductance between two coils is ___ the reluctance of magnetic path.

A. Directly proportional to

B. Inversely proportional to

C. Independent to

D. Equal to

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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 of the following is a disadvantage of a wire-wound resistor?

A. It has reactance in radio-frequency circuits

B. It cannot handle much power

C. It draws a large amount of current

D. It cannot handle high voltage

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4

The voltage cannot be exactly in phase with the current in a circuit that contains

A. Only capacitance

B. Only resistance

C. Inductance and capacitance

D. Inductancea capacitance and resistance

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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

A capacitive load always has a ______ power facto

A. Leading

B. Lagging

C. Zero

D. Unity

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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

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