Basic Electronics: Transformer Basics

What is the primary purpose of a transformer?

On what principle does a transformer operate?

Which type of current is required for effectively operating a standard transformer?

What constitutes the primary components of a basic transformer?

In a transformer, what is the role of the 'core'?

If a transformer's secondary winding has more turns than its primary winding, what type of transformer is it?

In a step-down transformer, how does the voltage in the secondary winding compare to the voltage in the primary winding?

What is the relationship between the number of turns in the primary ($N_p$) and secondary ($N_s$) coils and the voltages ($V_p$ and $V_s$) in a transformer?

A transformer has a turns ratio of 1:5. If the primary voltage is 120 V, what is the secondary voltage, assuming an ideal transformer?

If a transformer has a turns ratio of 4:1 and is connected to a 240V AC supply, what will be the voltage output?

A transformer with 500 turns on its primary coil is connected to a 120V AC source. If the secondary voltage is 24V, how many turns are on the secondary coil?

A step-up transformer is designed to increase voltage from 240 V to 720 V. If the primary coil has 200 turns, how many turns are required on the secondary coil?

What does a turns ratio of 1:3 in a transformer indicate?

Consider a transformer with a primary voltage ($V_p$) of 240V, a secondary voltage ($V_s$) of 120V, and a primary current ($I_p$) of 2A. Assuming an ideal transformer, what is the secondary current ($I_s$)?

A transformer is labeled with a turns ratio of 5:1. If it is connected to a 120V AC source and delivers 2A of current on the secondary side, what is the primary current, assuming an ideal transformer?

A transformer has 100 turns in its primary coil and 300 turns in its secondary coil. If the primary current is 3A, what is the secondary current, assuming an ideal transformer?

What is the primary function of an isolation transformer?

A transformer with a 4:1 turns ratio is used to step down voltage. If the primary voltage is 240V and the secondary current is 4A, what is the primary current, assuming an ideal transformer?

Consider a transformer with an efficiency of 90%. If the input power is 500W, what is the output power?

What primarily causes power losses in a real transformer?

A transformer rated at 240V primary and 12V secondary is used to power a device that draws 3A at 12V. Assuming 100% efficiency, what is the current drawn by the primary side?

A transformer has an input voltage of 220V and primary current of 2A. If the output voltage is 110V and the secondary current is 3.8A, what is the efficiency of the transformer?

What is the purpose of laminating the core of a transformer?

A transformer has a primary coil with 1200 loops and a secondary coil with 1000 loops. If the current in the primary coil is 4 Amperes, what is the current in the secondary coil?

A transformer has primary and secondary turns of 8 and 5 respectively. If the primary voltage is 240 V, find the secondary voltage.

A transformer has a primary coil and a secondary coil with the number of loops as 500 and 5000, respectively. If the input voltage is 220 V, what is the output voltage?

In a practical transformer, the efficiency is primarily affected by:

What is the primary advantage of using transformers in power distribution systems?

A transformer core is usually made of silicon steel because:

Which statement is true regarding the currents in an ideal transformer?

The power input to a transformer is 200 W. Due to losses within the core and windings, the power output is only 180 W. What is the efficiency of this transformer?

A transformer has 80 turns in its primary and 8 in its secondary. If the primary voltage is 20V and the primary current is 0.4A, determine the secondary current if the transformer is 50% efficient

If transformers are rated based on apparent power, and you have a transformer with $V_p = 120$ Volts, $V_s = 12$ Volts, and $I_p = 0.4$ Amperes, determine $I_s$ if the transformer is 50% efficient.

Refer to the image. Determine the primary voltage, $V_p$, if the secondary voltage, $V_s$, is $24V$ and $N_1:N_2 = 11:1$.

Refer to the sample problem in the images showing a Table of Transformer data. Determine $N_s$ for Transformer 1 assuming $\eta = 50%$.

Refer to the sample problem in the provided images showing a Table of Transformer data. Determine $I_p$ for Transformer 2 assuming $\eta = 50%$.

In a transformer, what happens to the magnetic flux in the core when the primary winding is energized with AC?

In an ideal transformer, which of the following statements about power is true?

Which factor does NOT affect the amount of voltage induced in the secondary coil of a transformer?

A transformer is used to step down voltage from 2400 V to 240 V. If the primary current is 0.5 A, what is the secondary current, assuming an ideal transformer?

What will happen if a transformer designed for 50 Hz is operated at 60 Hz?

Which of the following parameters remains nearly the same in an ideal transformer?

What is a transformer?

Transformer Use

Transformer Coils

Primary Coil

Secondary Coil

Transformer Circuits

Mutual Induction

Isolation Transformer

What is a Step-Up Transformer?

What is a Step-Down Transformer?

What is turns ratio?

Efficiency Formula

Function of Transformer

Transformer Input