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joke for Electrical Engineers,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

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download_crux

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ac current jumps over capacitor joke

INTERVIEW

Sub: electrical Engineering

People come up with peculiar or funny answers in interviews or exams:

Interviewer: Why is a thicker conductor necessary to carry a current in A.C. as
compared to D.C. ?

Candidate: An AC current goes up and down (drawing a sinusoid) and requires more space inside the wire, so the wire has to be thicker.

Interviewer: How will you tell if that wall outlet carries AC or DC ?

Candidate: I will put my finger in. If it is pushed away, it is DC. If it gets stuck, it
was AC.

Interviewer: How will you reverse direction of an induction motor?

Candidate: I will remove the four bolts at the base, turn the motor around, and put back the bolts.

Interviewer: How do you start a synchronous motor?

Candidate: Vrrrrrrrmmmmmmmmmmmmmmmmmmm (in rising pitch)

Interviewer: Stop! Stop!

Candidate: rrrrrrrmmmmmmmmmmmmmmmmmmmm (in falling pitch)

Interviewer: How do you limit surge current within an integrated circuit?

Candidate: By using a miniature circuit breaker.

External (to student) : " Why does a capacitor block DC but allow AC to pass through?

Student: See, a capacitor is like this ---| |--- , OK. DC Comes straight, like this ----------, and the capacitor stops it. But AC,goes UP, DOWN, Up DOWN and jumps right over the capacitor!"

Examiner : "What is a step-up transformer?"

Student : "A transformer that is put on top of electric poles."

Examiner (smiling): "And then what is a step-down transformer?"

Student (hesitantly):"Uh - A transfomer that is put in the basement or in a pit?"

Examiner (pouncing): "Then what do you call a transformer that is installed on the ground?"

(student knows he is caught -- can't answer)

Examiner (impatiently): "Well?"

Student (triumphantly): "A stepless transformer, sir!"
 

Re: joke for Electrical Engineers,,,,,,,,,,,,,,,,,,,,,,,,,,,

Very nice. The stepless is the best!
 

Ok that is funny but now I feel like an idiot,

How will you reverse direction of an induction motor?
you just reverse the starter inductor right?
 

Re: joke for Electrical Engineers,,,,,,,,,,,,,,,,,,,,,,,,,,,

b4bb4ge said:
Ok that is funny but now I feel like an idiot,

How will you reverse direction of an induction motor?
you just reverse the starter inductor right?

If we think a motor like one Iman free (for rotation) in center and two other imans, just at circular border, that change the position of North/South poles in relation to Central Iman, to get motion. We can see what forces are necessary to reverse motion.

Iman -> natural, electroiman, etc
 

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