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Electrical and Electronics Engineering Interview Questions and Answers

Electrical and Electronics Engineering Interview Questions and Answers

Question - 1 : - What Does Bode Plots Shows?

Answer - 1 : -

Bode plots are a graphical way to display the behavior of a circuit over a wide range of frequencies. By plotting the amplitude and phase versus the logarithm of frequency, each unit of change on the ω axis is equal to a factor of 10 also called a decade of frequency. Also, there may be a wide distribution in the amplitude response over a specified range of frequencies. The usual way is to plot the amplitude in dB and phase in degrees or radians versus the logarithm of frequency.

Question - 2 : - How To Calculate Energy Stored In An Inductance?

Answer - 2 : -

Energy stored =1/2 L I2 Joules where L is in henries and I is in amps.

Question - 3 : - How To Calculate Energy Stored In A Capacitance?

Answer - 3 : -

1/2 C V2 Joules where C is in farads and V in volts.

Question - 4 : - At What Base You Will Tell The Direction Of Rotation Of Dc Motors And Generators?

Answer - 4 : -

Motors obey the left hand rule and generators the right hand rule.

Question - 5 : - What Is Force On Parallel Conductors?

Answer - 5 : -

F = [2 I2 / d] 10­
Newtons/meter where I is in amps and d is in meters With currents in opposite directions, the force is pushing the conductors apart.

Question - 6 : - What Is Corkscrew Rule?

Answer - 6 : -

As current flows along a wire,the magnetic field rotates in the direction of a corkscrew.

Question - 7 : - How Would You Calculate Power Loss In A Resistor?

Answer - 7 : -

W = I2 R = V2 / R.

Question - 8 : - What Do You Mean By Pull Of Electromagnet?

Answer - 8 : -

Pu11= B2 107 / (8 ) Newtons per m2 of magnet force where B is in tesla.

Question - 9 : - What Is The Method To Solve Circuit Using Source Transformation?

Answer - 9 : -

In an electric circuit, it is often convenient to have a voltage source rather than a current source (e.g. in mesh analysis) or vice versa. This is made possible using source transformations. It should be noted that only practical voltage and current sources can be transformed.

In other words, a Th´evenin’s equivalent circuit is transformed into a Norton’s one or vice versa. The parameters used in the transformation are given as follows.

Th´evenin parameters: VTH ,RTH =⇒ RN = RTH ,IN = VTH/RTH.

Norton parameters: IN ,RN =⇒ RTH = RN ,VTH = RN IN.

Any load resistance, RL will have the same voltage across, and current through it when connected across the terminals of either source.

Question - 10 : - What Is Meant By Reverse Polarity And How It Can Be Fixed?

Answer - 10 : -

Reverse polarity is referred in a condition where one or more of your receptacles are connected incorrectly. To fix the reverse polarity, check the wire connection at the outlet and inspect your receptacle. A receptacle with reverse polarity will have the white wire screwed to the hot side and the black wire will be connected to the neutral side, if that the case swap the wires and it will resolves the problem. If it persists, a licensed electrician will be needed.

NCERT Solutions


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