The internal resistance of an ideal current source is
Infinite
Zero
Equal to the load resistance
To be determined
Correct Answer :
A. Infinite
Related Questions
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
Electron flow assumes charges flow from
Negative to positive
Negative to negative
Positive to negative
Positive to positive
How many coulombs are delivered by a storage battery in 25 hours if it is supplying current at the rate of 3 A?
2.592 x 105C
2.592 x 103 C
2.592 x 108 C
2.592 x 1012 C
A capacitive load always has a ______ power facto
Leading
Lagging
Zero
Unity
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
Voltage resonance means
Series resonance
Parallel resonance
Current magnification
Gain magnification
An inductor carries 2 A dc. If its inductance is 100 Ha then what is its inductive reactance?
Zero
1.3 k
Refers to the outward-curving distortion of the lines of force near the edges of two parallel metal plates that form a capacitor.
Skin effect
Night effect
Edge effect
Hall effect
Points to be considered in choosing a capacitor
Working voltage
Type of dielectric
Capacitance
All of the above
A series RLCcircuit consists of a 10 resistor in series with L = 10 Ha and C= 100 F. Determine a new value of Ia for which the resonant frequency is one ±half the original value.
40 H
40 mH
40 pH
40 nH
What is the form factor of a triangular wave?
What is the peak factor for alternating current or voltage varying sinusiodally?
Which of the following dielectric materials makes the highest-capacitance capacitor?
Air
Barium-strontium titanite
Mica
Electrolyte
If a multiplate capacitor has 10 platesa each of area 10 cm2a then
10 capacitors will be in parallel
10 capacitors will be in series
9 capacitors will be in parallel
9 capacitors will be in series
Which one of the following elements serves as a protection against overload?
Fuse
Switch
Resistor
Relay
Barium-strontium titanite dielectric material is also called
Ceramic
Polyster
Electrolytic
Bakelite
The symbol Q refers to
Resonance quotient
Quality factor
Power quotient
Qualification test
Which statement is true?
A series resonant circuit is of high impedance
A parallel resonant circuit is of low impedance
A series resonant circuit is inductive if it operates at a frequency higher than the resonant frequency
A parallel resonant circuit is inductive if it operates at a frequency higher than the resonant frequency
The current is ____ times the maximum current at half-power points of a resonance curve.
Effects of capacitance
It opposes any change in the amount of voltage
Voltage is lagged behind the current by a quarter cycle
Electric energy is stored in the capacitor in the form of electrostatic field
All of the above
The Q-factor of a parallel resonant circuit is also known as
Current magnification factor
Voltage magnification factor
Load factor
Leakage factor
For a carbon composition resistora typical resistance values range from
2.7 to 22 M
1000 to 10000
10 to 10 M
2.7 to 2.7G
An inductive circuit of resistance 16.5 and inductance of 0.14 H takes a current of 25 ?. if the frequency is 50 Hza find the supply voltage.
1501 V
1174V
1877V
991 V
What theorem is usually used in the analysis of transistor circuit?
Superposition theorem
Millman�s theorem
Thevenin�s theorem
Norton�s theorem
The ratio of the flux density to the electric field intensity in the dielectric is called
Permittivity
Field intensity
Permeability
Elasticity
In a series circuit with unequal resistances the
Highest R has the highest V
Lowest R has the highest V
Lowest R has the highest I
Highest R has the highest I
An inductance of 1 mH is
0.001 H
0.01 H
0.0001 H
0.10 H
Series resonant circuit is sometimes known as
Rejector circuit
Acceptor circuit
Inductive circuit
Capacitive circuit
When capacitors are connected in parallela the total capacitance is
Greater than the largest capacitor
Smaller than the largest capacitor
Smaller than the smallest capacitor
Greater than the smallest capacitor
Metal tin becomes superconductor at approximately
6 K
3.7 K
5 K
4.7K