1 |
In frequency modulation which factor changed. |
Amplitude of charge carriers
Frequency of charge carriers
Amplitude of signal
Frequency of signal
|
2 |
In modulation, low frequency signal is known as |
Carrier wave
fluctuated signal
Modulated carrier signal
Modulation signal
|
3 |
High frequency radio wave is called as |
Fluctuate
Carrier wave
Matter wave
Mechanical wave
|
4 |
The A.M. transmission frequencies range from |
540 KHz to 1000 KHz
540 Khz to 1600 KHz
520 KHz TO 1600 KHz
520 KHz TO 1400 KHz
|
5 |
Electron vibrating 94,000 times each second will produce radio waves of frequency. |
94 Hz
940 HZ
94 Hz
490 Hz
|
6 |
Electro magnetic waves emitted from radio antenna are. |
Stationary
Longitudinal
Transvers
Both a and b
|
7 |
The velocity of an oscillating charge as it moves to and fro along a wire is. |
Changing
Constant
Infinite
zero
|
8 |
Resistance of choke is |
zero
Large
Very small
Infinite
|
9 |
Choke consumes extremely small |
Current
Charge
Power
Potential
|
10 |
In metal detector, we use. |
L-C circuit
R-L circuit
R-C circuit
RLC series circuit
|
11 |
In three phase voltage across any two lines is about. |
220 V
230 V
400 V
430 V
|
12 |
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>
|
13 |
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>
|
14 |
In RLC circuit the energy is dissipated in |
R only
R and L
R and C
L and C
|
15 |
A resistance frequency the impedance of RLC parallel circuit is. |
Zero
Infinite
Maximum
Minimum
|
16 |
The circuit which compares the two voltages is. |
LDR
Sensor
Comparator
Logic gate
|
17 |
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>
|