# Grey Matter Round 1

19 Questions | Total Attempts: 82  Settings  Grey Matter's intellect makes Ben smarter giving him great calculative and technical intellect. Is your grey matter so into electronics, logical thinking and gaming? If so then there are 20 questions to test your skills

• 1.
Voltage out of an ideal voltage source is
• A.

• B.

Zero

• C.

Constant

• D.

Internal resistance dependent

• 2.
The depletion layer is caused by:
• A.

Ions

• B.

Barrier potential

• C.

Doping

• D.

Recombination

• 3.
The relation between α and β is
• A.

α=β/(β+1)

• B.

β=α/(1-α)

• C.

α=β*(β+1)

• D.

Both (i) and (ii)

• 4.
The binary number 10101 is equivalent to the decimal number  [Blank].
• 5.
TBF16= [Blank]  (binary equivalent)
• 6.
The ripple factor of a full-wave rectifier is [Blank]
• 7.
What is the area of unit impulse function?  [Blank]
• 8.
Nyquist frequency of x(t) = 3cos50πt + 10sin300πt - cos100πt [Blank]
• 9.
Find Thevinin equivalent resistance [Blank]
• 10.
The source follower circuit is referred to as an impedance transformer because of very low output resistance making it act almost like an ideal voltage source.
• A.

True

• B.

False

• 11.
Which type of modulation is preferred on TV? [Blank]
• 12.
Which is not the internal circuit of an op-amp?
• A.

Level translator

• B.

Output driver

• C.

Differential amplifier

• D.

Clamper

• 13.
The minimum number of NAND gates required to implement the Boolean function (the image below) is  equal to:
• A.

4

• B.

Zero

• C.

1

• D.

7

• 14.
Y(t)=x(t)cost is time variant. True or False?
• A.

True

• B.

False

• 15.
Modulating signal m(t)=10 cos(206πt) is amplitude modulated with a carrier signal c(t)= 50 cos(210πt). Find the modulating index. [Blank]
• 16.
BJT is a                        device and JFET is a                     device.
• A.

Unipolar, Bipolar

• B.

Bipolar, Unipolar

• C.

Bipolar, Bipolar

• D.

Unipolar, Unipolar

• 17.
What is the full form of SCR?
• A.

Silicon Controlled Resistor

• B.

Semiconductor Controlled resistor

• C.

Silicon Controlled Rectifier

• D.

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