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ISRO EC Exam 2017: Practice Quiz 7

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Question 1

An NPN Bipolar Transistor with a current gain of 100 is biased in saturation mode. If the base current is increased by

then

Question 2

A CMOS Inverter is shown below in the figure.

For which one of the following is true if the threshold voltage of the NMOS transistor is 1 V and that of PMOS transistor is -1 V.

Question 3

Which of the following modulation scheme requires minimum power for transmission?

Question 4

Which of the following channel coding scheme helps in correcting burst errors?

Question 5

In figure,

and

are p-channel MOS transistors, and

and

are n-channel MOS transistors.

and

are binary signals. The output

Question 6

The number of address lines in a 8 bit 4 K ROM is

Question 7

An 8085 processor has register contents

and

before the execution of instruction PUSH B. The value of

and the content of the Stack Top after the execution of the instruction respectively are

Question 8

The secondary coil of an ideal 2 : 1 transformer has a 1 Farad capacitor connected across its terminals. The component that needs to be put in series with the primary coil in order that the effective power factor of the combination on the primary side is zero is