# A10 kW carrier is sinusoidally modulated by two carriers corresponding to a modulation index of 30% and 40% respectively. The total radiated power is

1.  11.25 kW

2.  12.5 kW

3.   15 kW

4.  17 kW

4

11.25 kW

Explanation :
No Explanation available for this question

# In phase modulation, frequency deviation is

1.  independent of the modulating signal

2.  inversely proportional to the modulating

3.  directly proportional to the modulating signal

4.  inversely proportional to the square root of the modulating frequency

4

directly proportional to the modulating signal

Explanation :
No Explanation available for this question

# In amplitude modulated system, if total power is 600 W and power in carrier is 400 W, then modulation index is

1.  0.5

2.   0.75

3.   0.9

4.  1

4

1

Explanation :
No Explanation available for this question

# If  angle-modulated signal is given by fa(t).=cos (2 x108 πt+75 sin 2x103 πt) then peak frequency deviation of the carrier is

1.  1kHz

2.   7. 5kHz

3.   75kHz

4.  100MHz

4

75kHz

Explanation :
No Explanation available for this question

# If radiated power of AM transmitter is 10 kW, then power in the carrier for modulation index of 0.6 is nearly

1.  8. 24 kW

2.  8. 47 kW

3.  9. 26 kW

4.  9.6 kw

4

8. 47 kW

Explanation :
No Explanation available for this question

# As modulation index of an FM signal with sinusoidal modulation is increased from zero to three, power in the carrier component will

1.  increase continuously

2.  decrease continuously

3.  first increase, attain a maximum and then decrease

4.   first decreases, become zero and then increase

4

decrease continuously

Explanation :
No Explanation available for this question

# A frequency-modulated voltage wave is given as  V=10 sin (2πx 108t +5 sin 400πt). The carrier frequency and maximum deviation of the signal respectively are

1.  10 MHz and 10 kHz

2.  100 MHz and 1 kHz

3.  10 MHz and 10 kHz

4.   100101z and 10 kHz

4

100101z and 10 kHz

Explanation :
No Explanation available for this question

# In a JFET, beyond the pinch off voltage, as the drain voltage increases, the drain current

1.  remains almost constant

2.  decreases

3.  increases

4.  may increase or decrease

4

may increase or decrease

Explanation :
No Explanation available for this question

# A(DSB-C) signal is being detect.. synchronously. The phase error in the locally generated carrier .

1.  cause phase delay

2.   cause phase distortion only

3.  have the effect of reducing  output and causing

4.   reduce detected output only

4

have the effect of reducing  output and causing

Explanation :
No Explanation available for this question

# n-channel FETs are superior to p-channel FETs because

1.  they have lower switching time

2.  they have lower pinch off voltage

3.  they have higher input impedance

4.  mobility of charge carrier electron in n-channel FET is greater than the mobility of charge carrier hole in p-channel FET

4