# An audio signal has a band width of 26 kHz. The minimum value of |m(t)|I is 5 V. This signal frequency modulates a carrier. If frequency sensitivity constant of the modulator is 20kHz/V then according to Carson's rule, bandwidth of the modulator output would be

1.  50 kHz

2.  250 kHz

3.  200kHz

4.  100 kHz

4

250 kHz

Explanation :
No Explanation available for this question

# In a tunnel diode, depletion layer width is of the order of

1.  100A0

2.  0.1 micron

3.  1 micron

4.  5 micron

4

100A0

Explanation :
No Explanation available for this question

# A transmitter uses a carrier frequency of 1 kHz. The transmitter output is xc(t)=cos(2π1000t+20t2) Phase and frequency deviation respectively will be

3.  20t2 rad 20/π t Hz

4.   20/π t rad, 20t2 Hz

4

Explanation :
No Explanation available for this question

# Tunnel diode is a pn diode with

1.  very high doping in p region

2.  very high doping in n region

3.  very high doping in both p and n region

4.  low doping in both p and n region

4

very high doping in both p and n region

Explanation :
No Explanation available for this question

# The most important application of tunnel diode is

1.  as rectifier

2.  as switching device in digital circuits

3.  as voltage controllable device

4.  as oscillator

4

as voltage controllable device

Explanation :
No Explanation available for this question

# Avalanche breakdown results basically due to

1.  impact ionization

2.  strong electric field across the junction

3.  emission of electrons

4.   rise in temperature

4

emission of electrons

Explanation :
No Explanation available for this question

# Zener breakdown results basically due to

1.  impact ionization

2.  strong electric field across the junction

3.  emission of electrons

4.  high thermal energy of electrons

4

high thermal energy of electrons

Explanation :
No Explanation available for this question

# Zener breakdown results at applied

1.  forward bias exceeding about 6 volt

2.  forward bias below 6volts

3.  reverse bias below 6 volts

4.  reverse bias below 6 volts

4

reverse bias below 6 volts

Explanation :
No Explanation available for this question

# In a breakdown diode, the temperature coefficient of breakdown voltage VZ

1.  is always positive

2.  is always negative

3.  is always zero

4.  may be positive or negative

4

is always zero

Explanation :
No Explanation available for this question

# On increasing the current through the zener diode by a factor of 2, the voltage across the diode

1.  gets doubled

2.  becomes half

3.  remains almost unchanged

4.  becomes 4 times as large

4