Trouble with transformers question
Hi, I'm not sure how this has to be worked out...
A transformer has 1200 turns on the primary coil and 500 turns on the secondary coil. The primary coil draws a current of 0.25 A from a 240 V ac supply. If the efficiency of the transformer is 83%, what is the current in the secondary coil?
A transformer has 1200 turns on the primary coil and 500 turns on the secondary coil. The primary coil draws a current of 0.25 A from a 240 V ac supply. If the efficiency of the transformer is 83%, what is the current in the secondary coil?
Reply 1
Original post
by themaltesefalconHi, I'm not sure how this has to be worked out...
A transformer has 1200 turns on the primary coil and 500 turns on the secondary coil. The primary coil draws a current of 0.25 A from a 240 V ac supply. If the efficiency of the transformer is 83%, what is the current in the secondary coil?
A transformer has 1200 turns on the primary coil and 500 turns on the secondary coil. The primary coil draws a current of 0.25 A from a 240 V ac supply. If the efficiency of the transformer is 83%, what is the current in the secondary coil?
You can use the efficiency formula:
(edited 10 months ago)
Reply 2
12
Original post
by themaltesefalconHi, I'm not sure how this has to be worked out...
A transformer has 1200 turns on the primary coil and 500 turns on the secondary coil. The primary coil draws a current of 0.25 A from a 240 V ac supply. If the efficiency of the transformer is 83%, what is the current in the secondary coil?
A transformer has 1200 turns on the primary coil and 500 turns on the secondary coil. The primary coil draws a current of 0.25 A from a 240 V ac supply. If the efficiency of the transformer is 83%, what is the current in the secondary coil?
use the turns ratio to work out the output voltage
Calculate the input power (P = V I )
Calculate 83% of this to find the output power
Divide this by the output voltage to get the output current
Have a look at
https://www.youtube.com/@understandingphysicsbydave1349
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