Asked by Alondra Bello on May 07, 2024
Verified
A transformer has a 240 V primary and a 60 V secondary. With a 5 ohm load connected, what is the primary current?
A) 2 A
B) 3 A
C) 7 A
D) 8 A
Ohm Load
An electrical load with a specific resistance value, measured in ohms, determining how much current will flow for a given voltage.
Primary Current
The current flowing through the primary winding of a transformer or another electrical device intended for initial energy transformation.
Secondary
The coil in a transformer that receives energy from the primary coil through electromagnetic induction, thereby transferring energy from the primary to the load.
- Understand transformer winding types (primary and secondary) and their roles in transformer operation.
- Understand the operational properties of transformers, including assessments of voltage, current, and turns ratio.
Verified Answer
BF
belle fanm creole fanm creoleMay 09, 2024
Final Answer :
B
Explanation :
The transformer's voltage ratio is 240V/60V = 4:1. This means the current ratio is the inverse, 1:4. With a 5 ohm load on the secondary, the secondary current is I = V/R = 60V / 5 ohms = 12A. Therefore, the primary current is 12A / 4 = 3A.
Learning Objectives
- Understand transformer winding types (primary and secondary) and their roles in transformer operation.
- Understand the operational properties of transformers, including assessments of voltage, current, and turns ratio.