ECE QUIZ ROUND-1

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A wave is modulated by two sin waves having modulation indices of 0.3 and 0.5. Find the total modulation index?

0.1

0.7

0.58

0.35

If VCC = 12V and vs=1mV, then Rf/Rs is ___

>12000

<12000

12000

Transformer utilization factor for the rectifier is

Bridge rectifier>FWR>HWR

HWR>FWR>Bridbe recifier

FWR>HWR>Bridbe recifier

Bridge rectifier>HWR>FWR

If a capacitor of capacitance 9.2F has a voltage of 22.5V across it. Calculate the energy of the capacitor

5062.5W

506.25W

50.625W

50625W

Standard intermediate frequency used for AM receiver is

455 MHz

455 KHz

455 Hz

20 KHz

The capacitor doesn’t allow sudden changes in

Voltage

Current

Resistance

Capacitance

KCL is based on the fact that

There is a possibility for a node to store energy.

There cannot be an accumulation of charge at a node.

Charge accumulation is possible at node

Charge accumulation may or may not be possible.

If the output voltage is not a linear function of input voltage then __

Op-amp acts a linear device

Op-amp acts as a non-linear device

Op-amp acts a polar device

Op-amp acts as an inverter

The opamp in the Inverting circuit is in

Linear region

Saturation

Cut-off region

Non-linear region

Which of the following signals are non periodic

S(t)=cos 2t+sin 3t+cos 5t

S(t)=exp(j4π)

S(t)=exp(-7t)sin 10 ∏t

S(t)=sin 2tsin 4t

An Inductor works as a ___________ circuit for DC supply.

Open

Short

Polar

Non-polar

In a network maximum power transfer occurs when

RTh= -RL

RTh/RL =0

RTh= RL

RTh+RL= 1

Which of the following equation represents mass action law for semiconductors in electronic circuits?

n × p = ni1/2

N × p = ni2

n × p = ni

n × p = ni3

For the system, y (t) = u{x (t)} which of the following holds true?

System is Linear, time-invariant, causal and stable

System is time-invariant, causal and stable

System is causal and stable

System is stable

What type of semiconductor is used in LED electronic circuits?

Intrinsic semiconductor

Compound semiconductor

Degenerated semiconductor

Compensated semiconductor

ECE QUIZ ROUND-1

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