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12345 [234]
2 years ago
11

DC current is flowing in the primary coil of a transformer. Which of the following DOES NOT happen? A. There is a magnetic field

in the primary
B.Current flows in the primary
C.The primary gets warm
D.Current flows in the secondary
Physics
2 answers:
Olegator [25]2 years ago
8 0

DC current is flowing in the primary coil of a transformer.

<em>Choice-D</em> is the one that does NOT happen.

A. There is a magnetic field in the primary.

Yes, just as there is around EVERY current-carrying conductor.

B. Current flows in the primary.

Yes.  The first sentence says so.

C. The primary gets warm.

Yes. Just like ANY current-carrying conductor that has any resistance.

<em>D. </em> Current flows in the secondary

<em>NO.</em>  Current in the secondary is the result of CHANGES in the primary current. Since the primary current is DC, there aren't any changes.

A long time ago, in engineering school in a galaxy far away, I learned that when you put DC into a transformer, what comes out is smoke.

GrogVix [38]2 years ago
7 0

Answer:

d

Explanation:

and just because trust me on this one my guy

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You have a summer job at a company that developed systems to safely lower large loads down ramps. Your team is investigating a m
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Answer:

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---> v = emf / [B d cos (A)]

where

B = magnetic field

d = distance of two rails

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A = angle of rails with respect to the horizontal

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Thus,

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******************************

v = [R m g sin (A) / B^2 d^2 cos^2 (A)]

Plugging in the units,

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= [ [m^2/s^2 * s * m/s^2] / [(m^2) / (s^2)]

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Cancelling s,

=m/s   [DONE! WE SHOWED THE UNITS ARE CORRECT! ]

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