The result of rust in electrical (wire) connection is
Inductance
Conductance
Impedance
Resistance
Correct Answer :
D. Resistance
Related Questions
A capacitor of 0.5 F charged to 220 V is connected across an uncharged 0.5 F capacitor. What is the voltage across each capacitor?
220 V
150 V
110 V
22 V
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
A rheostat is a form of
Variable resistor
Variable capacitor
Potentiometer
Thermocouple
A switch designed to have low capacitance between its terminal when open.
LOCAP switch
AntiLOCAP switch
Anticapacitance switch
Capacitance switch
Permeability is otherwise known as
Magnetic conductivity
Magnetic susceptibility
Electric conductivity
Electric susceptibility
What is the resonant frequency of a circuit when L of 3 microhenrys and C of 40 picofarads are in series?
14.5 kHz
145 MHz
14.5 MHz
145 kHz
Thevenin�s theorem is what form of an equivalent circuit?
Current
Voltage
Both current and voltage
Neither current nor voltage
A real current source has
Infinite internal resistance
Zero internal resistance
Large internal resistance
Small internal resistance
The presence of an electric current is made known by
Electric shock
Effects produced
Magnetic shock
Flashing
A tank circuit is a
Parallel LC circuit
Series LCcircuit
A resonant circuit
A non-resonant circuit
The ratio between the active power and the apparent power of a load in an ac circuit is called
Quality factor
Power factor
Power ratio
Power reactive
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
The potential gradient in a cable is maximum in
Conductor
Outer sheath
Insulation
Uniformly all over
Which of the following conditions is not true for a series RLCcircuit at resonance?
Z = jXL
XL= XC
The power factor is one
The magnitude of Z is
What refers to such work at very low temperaturesa near absolute zero?
Cryogenics
Superconductivity
Subsonic
Thermionic
In an RL series circuita
Current lags voltage by less than 90�
Current lags voltage by 180�
Current lags voltage by 90�
Current leads voltage by 90�
What is the conductance of a circuit having three 10 resistors in parallel?
0.3 S
3.33 S
0.33 S
30 S
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
In a circuita a passive element is one which
Supplies energy
Receives energy
Both supplies and receives energy
Attenuates signal
When the temperature of copper wire is increased its resistance is
Increased
Decreased
Constant
Zero
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
A neon glow lamp used as a night light ionizes at approximately
70 V
80 V
90 V
100 V
Rationalizing the denominator of a complex number means
Eliminating the j component in the denominator
Adding j component in the denominator
Eliminating the j component in the numerator
Adding j component in the numerator
If resonant frequency is 10 kHz and quality factor is 50a then
Bandwidth is 200 Hz
XL= is 50a000
R is 50
XC= is 50a000
The internal resistance of an ideal current source is
Infinite
Zero
Equal to the load resistance
To be determined
What is the other name of relative permittivity?
Dielectric strength
Potential gradient
Breakdown voltage
Specific inductance capacity
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 is the rms value of a square wave?
Equals its peak value
Equals its peak-to-peak value
Peak divided by square root of two
Peak divided by pi
In a rectangular wavea the form factor is
What maximum voltage can be applied across the capacitor of time?
Working voltage
Surge voltage
Stray voltage
Peak voltage