The current and power drawn by the load

AI Thread Summary
A 36Ω resistive load connected to a transformer secondary with a terminal p.d. of 24V results in a secondary current of 0.667A and a power draw of 16W. The primary supply voltage is 480V, leading to a primary current of approximately 13.3A. The transformer turns ratio can be calculated using the voltage ratio of the primary to secondary. The calculations confirm the relationships between voltage, current, and resistance as outlined in the relevant equations. The user has expressed satisfaction with their solution and considers the discussion resolved.
lemon
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Homework Statement


A 36Ω resistive load is connected to the secondary of a transformer. The terminal p.d. at the secondary is 24v. If the primary is connected to a 480v a.c. supply, calculate:

a) the transformer turns ratio
b) the current and power drawn by the load
c) the current drawn from the supply

Homework Equations


1: V=IR
2:Vp/Vs=Np/Ns=ip/is
3: Np:Ns
P=IV

The Attempt at a Solution


a) Is=Vs/R = 24/36=0.667A
P=0.667Ax24V=16W

b) Ip=current drawn from the supply
Ip=Vp/R = 480V/36Ω=13.3A

Not sure if I'm getting this ok
Can somebody please check - thank you:smile:
 
Last edited:
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