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Home Q & A Board Science-Related Homework Help Physics
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wrote...
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Posts: 3560
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12 years ago
The primary coil of a transformer has 100 turns and its secondary coil has 400 turns. If the ac current in the secondary coil is 2 A, what is the current in its primary coil?
A) 2 A
B) 8 A
C) 1/2 A
D) 1/4 A
E) 4 A
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wrote...
#1
Staff Member
12 years ago
B
- Master of Science in Biology
- Bachelor of Science
wrote...
#2
12 years ago
to transmit electric power long distance, high voltage is used, the generator produces power at 1000 V and it needs to be transported at 2,000,000 V. would a ste-up or step-down transformer be needed?
wrote...
#3
Staff Member
12 years ago
Quote from: transformers (12 years ago)
ste-up
- Master of Science in Biology
- Bachelor of Science
wrote...
#4
12 years ago
 YOU WISH TO MAKE A TRANSFORMER THAT WILL TURN A NORMAL 120 V OUTLET VOLTAGE INTO 20 V. WHICH WILL HAVE MORE TURNS, THE PRIMARY OR THE SECONDARY?
wrote...
#5
Valued Member
12 years ago
Quote from: TRANSFORMERS (12 years ago)
YOU WISH TO MAKE A TRANSFORMER THAT WILL TURN A NORMAL 120 V OUTLET VOLTAGE INTO 20 V. WHICH WILL HAVE MORE TURNS, THE PRIMARY OR THE SECONDARY?

Vs/Vp = Ns/Np
you are talking about a step down transformer here.
obviously secondary will have fewer turns.
also start a new topic when posting a new question
I don't feel like riding until everything blurs.

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