In a step-up transformer, which of the following statements is correct?
Number of turns in primary is equal to number of turns in the secondary.
Number of turns in primary is more than the number of turns in the secondary.
Number of turns in primary is less than the number of turns in the secondary.
Number of turns in primary is always two times less than the number of turns in the secondary.
Number of turns in primary is less than the number of turns in the secondary.
In a step-up transformer, the correct statement is: "The number of turns in the primary is less than the number of turns in the secondary."
A step-up transformer is designed to increase the voltage from the primary winding to the secondary winding. To achieve this, the primary coil has fewer turns than the secondary coil. This difference in the number of turns allows for the voltage to be stepped up while maintaining the same power output.
The correct statement for a step-up transformer is: "Number of turns in primary is less than the number of turns in the secondary."
To understand this, let's first explain what a step-up transformer is. A step-up transformer is a device used to increase the voltage level of an alternating current (AC) electrical signal. It consists of two coils of wire called the primary coil and the secondary coil, which are wound around a core.
The primary coil is connected to the power source, while the secondary coil is connected to the load or the device that needs the higher voltage. The input voltage is applied to the primary coil, and due to electromagnetic induction, an alternating magnetic field is produced in the core, which then induces a voltage in the secondary coil.
In order to step up the voltage, the primary coil should have fewer turns than the secondary coil. This is because the voltage induction in the secondary coil is proportional to the ratio of the number of turns in the two coils.
For example, if the primary coil has 100 turns and the secondary coil has 500 turns, the induced voltage in the secondary coil will be five times greater than the voltage applied to the primary coil. Therefore, the number of turns in the primary coil is less than the number of turns in the secondary coil in a step-up transformer.