In a multiple capacitora the plate area is
Increased
The same
Decreased
Variable
Correct Answer :
A. Increased
Related Questions
In a parallel bank with unequal branch resistances
The highest R has the highest I
The lowest R has the highest V
The lowest R has the highest V
The highest R has the highest V
Barium-strontium titanite dielectric material is also called
Ceramic
Polyster
Electrolytic
Bakelite
What increases the resistance of wire at high frequencies?
Temperature
Voltage
Skin effect
Insulation
When voltage is applied across a ceramic dielectric the electrostatic field p roduced is 50 times greater than air dielectric. The dielectric constant of ceramic therefore is
Which of the following is a preferred resistor value?
43a000
54a321
The resistance of an insulator ___ when its temperature is increased.
Decreases
Remains the same
Increases
Varies
An inductive load always has a ___ power factor
Leading
Lagging
Zero
Unity
A three-by-threea series-parallel matrix of resistorsa all having the same ohmic valuea would have a net resistance of
One-third the value of a single resistor
Three times the value of a single resistor
The same value as a single resistor
Nine times the value of a single resistor
Which of the following elements is active?
Resistor
Inductor
Capacitor
Ideal voltage source
The curve between current and frequency is termed as
Voltage curve
Gain curve
Power curve
Resonance curve
Which of the following is a way of decreasing mutual inductance?
Moving the coils closer
Moving the coils apart
Decreasing the number of turns of either coil
Increasing the number of turns of either coil
What theorem is usually used in the analysis of transistor circuit?
Superposition theorem
Millman�s theorem
Thevenin�s theorem
Norton�s theorem
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.
Phase
Frequency
Amplitude
Waveform
What is the reciprocal of quality factor?
Power factor
Reactive factor
Dissipation factor
1/Q factor
If a coil has a Q of 10a it means that
The energy stored in the magnetic field of the coil is 10 times the energy wasted in its resistance
The energy wasted in its resistance is 10 times the energy stored in the magnetic field of the coil
It is a low Q coil
It is a high Q coil
What is the purpose of a load in an electric circuit?
To increase the circuit current
To decrease the circuit current
To utilize electrical energy
To make the circuit complete
What fusion of elements is without chemical action between them?
Mixture
Compound
Alloy
Ionization
In a complex number 5 + j 10a 10 is called ___ part.
Imaginary
Real
Conjugate
Integer
The temperature-resistance coefficient of pure gold is
A capacitance of 6 ��F means
6 pF
6 nF
6 fF
6 aF
In an ac wavea 30 degrees of phase is ___ of a cycle.
½
Which of the following capacitors is suitable for dc filter circuits?
Mica
Ceramic
Paper
Electrolytic
What is the most convenient way of achieving large capacitance?
By using multiplate construction
By using air as dielectric
By decreasing distance between plates
By using dielectric of low permittivity
The capacitance of a capacitor is ___ relative permittivity.
Directly proportional to
Inversely proportional to
Equal to
Inversely proportional to the square of
Norton�s theorem is what form of an ac equivalent circuit?
Voltage
Current
Both voltage and current
Neither voltage nor current
A 0.09 microfarad capacitor is charged to 220 volts. How long in milliseconds will it discharged resistor has a resistance of 20a000 ohms?
In a rectangular wavea the peak factor is
The temperature coefficient of resistance of electrolytes is
Negative
Positive
Zero
Infinite
A trimmer is a variable capacitor in which capacitance is varied by changing the
Number of plates
Dielectric
Distance between plates
Plate area
Which of the following does not refer to electrical energy?
Volt-ampere
Joule
Watt-second
Volt-coulomb