Transformer Voltage

Front

What is a transformer?

Back

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Front

What is the primary coil in a transformer?

Back

The primary coil is the coil in a transformer that receives the input voltage and current.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-3

Front

What is the secondary coil in a transformer?

Back

The secondary coil is the coil in a transformer that delivers the output voltage and current.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Front

What is the formula for calculating the output voltage of a transformer?

Back

Output Voltage (Vs) = Input Voltage (Vp) x (Turns in Secondary Coil (Ns) / Turns in Primary Coil (Np))

Front

If a transformer has 800 turns in the primary coil and 200 turns in the secondary coil, what is the turns ratio?

Back

The turns ratio is 4:1 (800 turns in primary to 200 turns in secondary).

Front

What happens to voltage when the turns ratio is greater than 1?

Back

When the turns ratio is greater than 1, the transformer is a step-down transformer, which decreases the voltage.

Front

What happens to voltage when the turns ratio is less than 1?

Back

When the turns ratio is less than 1, the transformer is a step-up transformer, which increases the voltage.

Front

Calculate the output voltage if the input voltage is 40V, primary turns are 800, and secondary turns are 200.

Back

Output Voltage = 40V x (200/800) = 10V.

Front

Calculate the output voltage if the input voltage is 20V, primary turns are 300, and secondary turns are 75.

Back

Output Voltage = 20V x (75/300) = 5V.

Front

Calculate the output voltage if the input voltage is 90V, primary turns are 300, and secondary turns are 100.

Back

Output Voltage = 90V x (100/300) = 30V.