• Support PF! Buy your school textbooks, materials and every day products Here!

Confused on amperes in primary & secondary circuits

  • Thread starter kriegera
  • Start date
  • #1
74
0

Homework Statement



A transformer has 500 turns in its primary coil and 4000 turns in its secondary. (a) What will be the voltage in the secondary if the primary voltage is 110? (b) If 5 amperes flow through the secondary circuit of the transformer, what will the current in the primary be? (c) If there are 8 amperes in the secondary, how many are there in the primary?

I'm a little confused on whether I'm inverting the equation correctly on parts b and c - can someone let me know if this is the formula they use?

Homework Equations





The Attempt at a Solution



v2/v1=n2/n1 So V2/110=4000/500 = 880V

b.)Ip/Is=Ns/Np = Ip/5 = 4000/500 = 40 A

c.)Ip/Is=Ns/Np = Ip/8 = 4000/500 = 64 A
 

Answers and Replies

  • #2
berkeman
Mentor
57,286
7,272

Homework Statement



A transformer has 500 turns in its primary coil and 4000 turns in its secondary. (a) What will be the voltage in the secondary if the primary voltage is 110? (b) If 5 amperes flow through the secondary circuit of the transformer, what will the current in the primary be? (c) If there are 8 amperes in the secondary, how many are there in the primary?

I'm a little confused on whether I'm inverting the equation correctly on parts b and c - can someone let me know if this is the formula they use?

Homework Equations





The Attempt at a Solution



v2/v1=n2/n1 So V2/110=4000/500 = 880V

b.)Ip/Is=Ns/Np = Ip/5 = 4000/500 = 40 A

c.)Ip/Is=Ns/Np = Ip/8 = 4000/500 = 64 A
Looks correct to me.
 

Related Threads on Confused on amperes in primary & secondary circuits

Replies
1
Views
7K
Replies
7
Views
17K
Replies
2
Views
3K
Replies
1
Views
3K
Replies
1
Views
8K
Replies
2
Views
4K
  • Last Post
Replies
4
Views
13K
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
2
Views
3K
Top