# A p-n junction series with a 100 Ω resistor is forward biased o that the current of 100mA flows.If voltage across this combination is instantly reversed to 10V at t=0,then reverse current that flows through the diode at t=0 is approximately given by

1.  0mA

2.  100mA

3.  200mA

4.  50mA

5.

5

100mA

Explanation :
No Explanation available for this question

# The transistor gain of the circuit shown in the figure is given by

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# An op-amp is open-loop gain of 105 and open-loop upper cut-off frequency of 10Hz. If this OP-AMP is connected as an amplifier with a closed-loop gain at 100, then new upper cut-off frequency will be

1.  10Hz

2.  100Hz

3.  10kHz

4.   100kHz

4

10kHz

Explanation :
No Explanation available for this question

# A OP-AMP has an offst voltage of 1 m V and is ideal in all other respects. If this OP-amp is used in the circuit shown in the figure, then output voltage will be (select nearest value)

1.  1mV

2.  1V

3.  ±1 V

4.   0V

4

±1 V

Explanation :
No Explanation available for this question

# The built-in potential (diffusion potential) in a p-n junction

1.  Is equal to the difference in the fermi level of the two sides, expressed in volts

2.  Increases with the increase in the doping levels of the two sides

3.  Increase with the increase in temperature

4.  All of these

4

All of these

Explanation :
No Explanation available for this question

# Assuming that operational amplifier shown in the figure is ideal, the current, I, through 1KΩ resistor is

1.  -4m A

2.  -2m A

3.  2m A

4.   4m A

4

-4m A

Explanation :
No Explanation available for this question

# The circuit shown in the given figure uses as an ideal OP-AMP working with +5v and -5V power supplies. The output voltage V0 is

1.  +5V

2.  -5V

3.  +1V

4.   -1V

4

-1V

Explanation :
No Explanation available for this question

# In the circuit of shown in the figure, LED will be ON if vi is

1.  >10 V

2.

3.  >5 V

4.

4

>5 V

Explanation :
No Explanation available for this question

# An OP-amp, having a slew rate of 62.8 V/msec, is connected in a voltage follower configuration. If maximum amplitude of the input sinusoid is 10 V, then minimum frequency at which slew rate limited distortion would set in at the output is

1.  1.0 MHz

2.  6.28MHz

3.  10.0 MHz

4.   62.8MHz

4

1.0 MHz

Explanation :
No Explanation available for this question

1.  00

2.  -900

3.  +900

4.   +180

4