Semiconductor Electronics Materials Devices And Simple Circuits

Physics
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The value of the resistor, , needed in the DC voltage regulator circuit shown here, equals

A
B
C
D
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The truth table given in figure represents:

A
AND - Gate
B
NOR - Gate
C
NAND - Gate
D
OR - Gate
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Identify the gate and match A, B, Y in bracket to check.

A
AND
B
OR
C
NOT
D
XOR
Medium
JEE Mains
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The combination of gates shown below yields 

A
OR gate
B
NOT gate
C
XOR gate
D
NAND gate
Medium
JEE Mains
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A Zener diode is connected to a battery and a load as shown. The currents , and are respectively

A
B
C
D
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To get an output of 1. from the circuit shown in figure the input must be 

A
B
C
D
Medium
JEE Mains
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Carbon, silicon and germanium have four valence electrons each. At room temperature which one ofthe following statements is most appropriate ?

A
The number of free conduction electrons is significant in C but small in Si and Ge
B
The number of free conduction electrons is negligibly small in all the three
C
The number of free electrons for conduction is significant in all the three
D
The number of free electrons for conduction is significant only in Si and Ge but small in C
Medium
JEE Mains
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In the given circuit, the current through zener diode is:

A
B
C
D
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