1 |
In metal detector, we use. |
L-C circuit
R-L circuit
R-C circuit
RLC series circuit
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2 |
In three phase voltage across any two lines is about. |
220 V
230 V
400 V
430 V
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3 |
In three phase A.C supply coils are inclined at an angle of. |
0<sup>o</sup>
90<sup>o</sup>
120<sup>o</sup>
80<sup>o</sup>
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4 |
In three phase A.C. generator the phase difference between each pair of coil is. |
45<sup>o</sup>
90<sup>o</sup>
120<sup>o</sup>
60<sup>o</sup>
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5 |
In RLC circuit the energy is dissipated in |
R only
R and L
R and C
L and C
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6 |
A resistance frequency the impedance of RLC parallel circuit is. |
Zero
Infinite
Maximum
Minimum
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7 |
The circuit which compares the two voltages is. |
LDR
Sensor
Comparator
Logic gate
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8 |
In RLC series circuit at resonance the phase difference between capacitor and inductor reactance is. |
90<sup>o</sup>
270<sup>o</sup>
0<sup>o</sup>
180<sup>o</sup>
|
9 |
The power factor of RL series circuit is. |
0
1
Less then 1
More than one
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10 |
At resonance frequency, the impedance of RLC series circuit is. |
Maximum
Minimum
Zero
Infinite
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11 |
X1is low for low frequency Fy but Xc is. |
Zero
Low
High
Same is H
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12 |
Which consumes small power. |
Inductor
Resistor
Motor
All of these
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13 |
The expression P = VI hold only when current and voltage are. |
In phase
Out of phase
At right angle to each other
At angle of 120 <sup>o</sup>
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14 |
Power dissipated in a pure inductor is. |
Large
Small
Infinite
Zero
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15 |
At resonance, the behavior of R-L-C series circuit is. |
Resistive
Capacitive
Inductive
Modulative
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16 |
The phase angle of a series RLC circult at resonant frequency is |
1/2
sigma
Zero
sigma /4
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17 |
The unit of impedance is. |
Henry
Hertz
Ampere
Ohm
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