What fusion of elements is without chemical action between them?
Mixture
Compound
Alloy
Ionization
Correct Answer :
C. Alloy
Related Questions
An inductor carries 2 A dc. If its inductance is 100 Ha then what is its inductive reactance?
Zero
1.3 k
A resistor wound with a wire doubled back on itself to reduce the inductance.
Bifilar resistor
Wire-wound resistor
Anti-inductive resistor
Bleeder resistor
The curve between current and frequency is termed as
Voltage curve
Gain curve
Power curve
Resonance curve
When capacitors are connected in seriesa the total capacitance is
Smaller than the smallest capacitor
Smaller than the largest capacitor
Greater than any of the capacitor
Greater than the largest capacitor
For greater accuracya the value of phase angle should be determined from
Cos
Tan
Sin
Sec
The charging of a capacitor through a resistance obeys
Exponential law
Logarithmic law
Linear law
Square law
It is impossible to change the voltage across a capacitor instantlya as this would produce ___ current.
Infinite
Zero
Low
High
Two capacitors of capacitance 9 F and 18 F in series will have a total capacitance of
27 F
162 F
6 F
180 F
A capacitor opposes change in
Voltage
Current
Voltage and current
Neither voltage nor current
For a triangular and sawtooth waveform the rms voltage or current equals
0.707times peak value
0.577 times peak value
0.577times average value
0.707times rms value
The voltage lags the current by cycle in a
Purely resistive circuit
Purely inductive circuit
Purely capacitive circuit
Circuit containing resistancea capacitance and inductance
When two coils of identical reactance are in parallel without mutual inductancea the reactance of the combination is ___ the reactance of each coil.
One half
Twice
Four times
One fourth
What value of R is needed with a 0.05 F Cfor an RCtime constant of 0.02 s?
400 M
400 G
400 k
An intermittent and non-symmetrical alternating current like that obtained from the secondary winding of an induction coil
Faradic current
Transient ac current
Inductive current
Capacitive current
What is the specific resistance of a pure germanium?
55 -cm
55 -m
55 -mm
55 k -m
What is the resonant frequency of a circuit when L of 25 microhenrys and C of 10 picofarads are in parallel?
10.1 kHz
10.1 MHz
101 MHz
101 kHz
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
If an emf in circuit A produces a current in circuit Ba then the same emf in circuit Bproduces the same current in circuit ? this theorem is known as
Maximum power transfer theorem
Millman�s theorem
Reciprocity theorem
Norton�s theorem
What is the other name of relative permittivity?
Dielectric strength
Potential gradient
Breakdown voltage
Specific inductance capacity
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
Another term for superconductor.
Generic conductor
Ultraconductor
Cryotron
Cryogenic conductor
A trimmer is a variable capacitor in which capacitance is varied by changing the
Number of plates
Dielectric
Distance between plates
Plate area
Form its definitiona the unit of electric fielda is the N/C and equivalent unit of is the
V(m)2
V(m)
V/m2
V/m
The electric field strength between capacitor plates has a unit
Volts per meter
Volts per mil
Amperes per meter
Amperes per mil
Which of the following is not a factor affecting dielectric strength?
Mass
Moisture content
Temperature
Thickness
What is the form factor of a triangular wave?
Electric energy refers to
Volt divided by coulomb
Voltampere
Volt-coulomb
Watt divided by time
For maximum power transfera what is the relation between load resistance RL and internal resistance R of the voltage source?
RL= 2 r
RL= 1.5 r
RL= r
RL= 3 r
In a rectangular wavea the peak factor is
A 5 F capacitor charge to 5V has a stored charge equal to
1 c
5 c
25 C
200 c