Transformers MDCAT Quiz is an electrical device used in changing the voltage of alternating current (AC) in a circuit by electromagnetic induction. It works on the principle of Faraday’s Law of Induction and has two coils: a primary coil and a secondary coil. When an AC voltage is applied across the primary coil, a changing magnetic flux is created, inducing a voltage in the secondary coil. The voltage ratio between the primary and secondary coils is determined by the ratio of the number of turns in each coil, given by the equation V sV p= N sN p, where V p and V s are the voltages in the primary and secondary coils, and N p and N s are the number of turns in the coils. For MDCAT students, understanding the working of transformers is essential for solving problems related to power transmission, energy efficiency, and the relationship between current and voltage in AC circuits.
Test Your Knowledge with an MDCAT Quiz
Take an MDCAT Quiz on Transformers to reinforce your understanding of the transformation of voltage and current in AC circuits. The quizzes will help you on topics like computing voltage and current in the secondary coil, the efficiency of transformers, and transformers as a part of power systems. Regular exercise will ensure that you are better prepared to solve transformer-related questions in the MDCAT exam.
- Test Name: Transformers MDCAT Quiz
- Type: Quiz Test
- Total Questions: 30
- Total Marks: 30
- Time: 30 minutes
Note: Answer of the questions will change randomly each time you start the test, once you are finished, click the View Results button.
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Free Flashcards for Efficient Revision
These free Flashcards on Transformers allow rapid access to important concepts like the relation between voltage and current in the primary and secondary coils, the construction of transformers, and the role of transformers in the power grid. Flashcards are particularly useful for last-minute revision before an exam or to quickly remember essential formulas and concepts during your preparation for the MDCAT.
A transformer operates on the principle of:
Electromagnetic induction
The primary coil of a transformer is connected to:
The power supply
The purpose of a transformer is to:
Increase or decrease voltage
In a transformer, the number of turns in the secondary coil is directly proportional to:
The voltage in the secondary coil
The ratio of the number of turns in the primary coil to the number of turns in the secondary coil is called:
Turns ratio
In an ideal transformer, the power input equals:
Power output
The voltage in the secondary coil of a step-up transformer is:
Higher than the primary voltage
A step-down transformer:
Decreases the voltage
The current in the secondary coil of a transformer is:
Inversely proportional to the voltage
The efficiency of an ideal transformer is:
1
The primary coil of a transformer is connected to the:
Input power
In a transformer, the core material is typically made of:
Soft iron
A transformer only works with:
Alternating current (AC)
The induced emf in the secondary coil of a transformer is proportional to:
The rate of change of magnetic flux
In a step-up transformer, the current in the secondary coil is:
Lower than the primary current
The power transferred by a transformer is given by:
P = V₁I₁ = V₂I₂
The transformer that increases voltage and decreases current is called:
Step-up transformer
The ratio of voltage in a transformer is equal to:
The turns ratio
The magnetic flux in the core of a transformer is:
Alternating
The transformer used to isolate circuits and prevent noise is called:
Isolation transformer
The turns ratio of a transformer is the ratio of:
The number of turns in the primary coil to the number of turns in the secondary coil
In a transformer, energy loss due to heat is primarily caused by:
Resistance in the coils
The voltage in the secondary coil of a transformer is given by:
V₂ = (N₂/N₁) × V₁
The efficiency of a transformer can be defined as:
Power output / Power input
The core of a transformer should be made of:
Soft magnetic material
The current in the secondary coil of a transformer is inversely proportional to:
The turns ratio
The transformer principle depends on:
Changing magnetic fields
In a transformer, the change in current is inversely proportional to:
The voltage
A transformer works by using:
Alternating magnetic fields
The efficiency of a real transformer is usually less than 100% due to:
Resistance in the wires
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