What does a transformer do to AC voltage?

Answer 1

Transformers either step up or step down the voltage of an alternating current.


Transformers only work with alternating currents. At the most fundamental level a transformer consists of a primary coil, a secondary coil and an iron core that passes through each coil. The core ensures that the flux through the two coils is linked. The a.c. in the primary coil causes the flux to be continuously changing direction thus producing a changing flux linkage through the secondary coil which induces an alternating current in it.

If the number of turns in the secondary coil is more than that of the primary then the transformer steps up the voltage, i.e. the voltage output is larger than the voltage input (n.b. power is the same if efficiency is 100% but less in real situations). The opposite is true if the number of turns in the secondary is less than that of the primary, i.e. step down, voltage output less than input.


As the flux through each coil is the same (at an instant in time) but the number of turns in each coil is different the flux linkage in each coil is different. The ratio of primary to secondary turns is equal to the ratio of primary to secondary voltages.

#N_p/N_s=V_p/V_s#

Sign up to view the whole answer

By signing up, you agree to our Terms of Service and Privacy Policy

Sign up with email
Answer 2

A transformer is a device that changes the voltage level of alternating current (AC) electricity. It does this through electromagnetic induction, where alternating current flowing through one coil, called the primary coil, induces a changing magnetic field in the transformer's core. This changing magnetic field then induces a voltage in another coil, called the secondary coil, which is connected to the load. By varying the number of turns in the primary and secondary coils, transformers can step up or step down AC voltage levels to match the requirements of different electrical systems and devices.

Sign up to view the whole answer

By signing up, you agree to our Terms of Service and Privacy Policy

Sign up with email
Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

Not the question you need?

Drag image here or click to upload

Or press Ctrl + V to paste
Answer Background
HIX Tutor
Solve ANY homework problem with a smart AI
  • 98% accuracy study help
  • Covers math, physics, chemistry, biology, and more
  • Step-by-step, in-depth guides
  • Readily available 24/7