# What will happen to a given transformer if it made to run at its rated voltage but reduced frequency?

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## What will happen to a given transformer if it made to run?

3. What will happen to a given transformer if it made to run at its rated voltage but reduced frequency? … Thus, as frequency increases we will get less core flux density and vice-versa.

## What is effect on the transformer operated below the rated voltage?

When operating below the rated voltage the KVA capacity is reduced correspondingly. For example, if a 480 volt primary transformer with a 240 volt secondary is operated at 240 volts, the secondary voltage is reduced to 120 volts.

## What will happen if the regulation of a transformer is poor Have you experienced the effect of poor regulation If yes when and where?

If the transformer supplies a very low lagging power factor, large secondary currents will flow resulting in poor voltage regulation due to greater voltage drops in the winding. … Therefore positive regulation produces a voltage drop in the winding while a negative regulation produces a voltage rise in the winding.

## What happens to the secondary output voltage of a transformer if the supply frequency is increased?

correct answer is option (A). If frequency increases, the secondary voltage or emf increases. And secondary voltage decreases by the reduction of supply frequency. … But with high frequency there is increase in transformer losses like core loss and conductor skin effect.

## Which is not loss in transformer?

What are No-Load Losses (Excitation Losses)? It is the loss in a transformer that is excited at rated voltage and frequency, but without a load connected to the secondary. No-load losses include core loss, dielectric loss, and copper loss in the winding due to exciting current.

## What would happen if a transformer is connected to a DC supply?

If the primary of a transformer is connected to the DC supply, the flux produced in the primary will be of constant magnitude because of DC current. … So the transformer can be damaged due to this high current, if it is connected to DC supply.

## Why does current decrease when voltage increases in a transformer?

A transformer transfers power from the primary coil to the secondary coil. Since the power must stay the same, if the voltage increases, the current must decrease. … That’s because it’s the change of the magnetic field created by the primary coil that induces voltage in the secondary coil.

## What causes voltage to be induced in a transformer?

When the magnetic lines of flux flow around the core, they pass through the turns of the secondary winding, causing a voltage to be induced into the secondary coil. The amount of voltage induced will be determined by: N*dΦ/dt (Faraday’s Law), where N is the number of coil turns.

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## How does a transformer increase voltage?

A transformer converts alternating current (AC) from one voltage to another voltage. It has no moving parts and works on a magnetic induction principle; it can be designed to “step-up” or “step-down” voltage. So a step up transformer increases the voltage and a step down transformer decreases the voltage.

## What will happen if the efficiency of a transformer is poor?

Poor efficiency of transformer will cause power loss and so loss of money. Part of the power loss will be used in heating up the primary/secondary windings.

## Why is voltage regulation important in a transformer?

Significance of Voltage regulation

It is necessary to maintain the supply voltage of the equipment supplied by the transformer. Because the supply voltage directly affects the performance of the equipment. Hence, the voltage regulation of the transformer is significant.