Points to be considered in choosing a capacitor
Working voltage
Type of dielectric
Capacitance
All of the above
Correct Answer :
D. All of the above
Related Questions
The hot resistance of an incandescent lamp is about ___ times its cold resistance.
Another term for superconductor.
Generic conductor
Ultraconductor
Cryotron
Cryogenic conductor
What is the hot resistance of a 100 Wa 220 V incandescent lamp?
In the 5-band method of capacitor color codinga the first band indicates
Temperature coefficient
Tolerance
1stdigit
Capacitance value
Which of the following is the statement of Ohm�s law?
Electric current is directly proportional to both voltage and resistance
Electric current varies directly as the voltage and inversely as the resistance
Electrical power is directly proportional to the resistance and inversely as the current squared
Electrical power is directly proportional to both voltage squared and the resistance
An inductance of 1 mH is
0.001 H
0.01 H
0.0001 H
0.10 H
Which of the following is a common material used in wire-wound resistors?
Manganin
Carbon
Bronze
German silver wire
A neon glow lamp used as a night light ionizes at approximately
70 V
80 V
90 V
100 V
In a rectangular wavea the form factor is
Parallel resonant circuit is sometimes called as
Acceptor circuit
Rejector circuit
Inductive circuit
Capacitive circuit
Thevenin�s theorem is what form of an equivalent circuit?
Current
Voltage
Both current and voltage
Neither current nor voltage
A law which states that when a constant electromotive force is applied to a circuit consisting of a resistor and capacitor connected in seriesa the time taken for the potential on the plates of the capacitor to rise to any given fraction of its final value depends only on the product of capacitance and resistance.
Child�s law
CR law
Coulomb�s law
Debye T3 law
Which of the following is a preferred resistor value?
43a000
54a321
Which of the following represents the energy stored in a cap
CV2/2
2Q2/C
C2/V
CV
In a series RLCcircuit
Increasing the frequency decreases the resistance
Increasing the frequency increases the resistance
Both XLand XCchange as frequency changes
Impedance will always decrease
Which of the following materials has the lowest dielectric strength?
Glass
Paper
Mica
Teflon
When frequency of an ac wave decreasesa the value of XLin a coil
Approaches zero
Gets larger positively
Gets larger negatively
Stays constant
The charge in the capacitor is stored at the
Terminals
Plates
Dielectric
Air
When two pure sine waves of the same frequency and the same amplitude which are exactly 180� outof-phase are added togethera the result is
A wave with twice the amplitude
A wave with half the amplitude
Zero signal
A wave with twice the frequency
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
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
In liquids and gasesa ionization current results from a flow of
Positive or negative ions
Free electrons
Ions that are lighter in weight than electrons
Protons
A capacitor is used to
Block dc current
Pass dc current
Open voltage source
Short the voltage source
What refers to the lowest voltage across any insulator that can cause current flow?
Conduction voltage
Critical voltage
Breakdown voltage
Voltage capacity
In an inductive coila the rate of rise of current is maximum
Near the final maximum value of current
At midvalue of current
At half-power points
After one time constant
What is the cross-sectional are of a conductor whose diameter is 0.001 inch?
One micron
One angstrom
One steradian
One circular mil
A capacitive load always has a ______ power facto
Leading
Lagging
Zero
Unity
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
A circuit whose parameters change with voltage or current.
Non-linear circuit
Linear circuit
Complex circuit
Passive circuit
A rheostat is a form of
Variable resistor
Variable capacitor
Potentiometer
Thermocouple