Electronic Principles
Assuming 100% efficiency, what is the power being applied to the primary winding of the transformer described in the above question?

200 W
100 W
20 W
None of these
1000 W

ANSWER DOWNLOAD EXAMIANS APP

Electronic Principles
Which one of the following principles best describes the basic operation of an electromagnet?

Current is induced in a conductor that is moving through a magnetic field
None of these
Like magnetic poles attract, while unlike poles repel
Current flowing through a conductor generates a magnetic field
Like magnetic poles repel, while unlike poles attract

ANSWER DOWNLOAD EXAMIANS APP

Electronic Principles
The south pole of a magnet is the one:

that would be attracted to the earth's south magnetic pole
that has its molecules arranged in a random pattern
that would be repelled by the north pole of another magnet
None of these
that would be attracted to the earths north magnetic pole

ANSWER DOWNLOAD EXAMIANS APP