Understanding Input and Output Currents in Transformers and Their Practical Applications

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Physics, Science, Engineering
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10th Grade - University
•
Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary function of a transformer?
To store electrical energy
To increase or decrease the potential difference of an AC supply
To convert direct current to alternating current
To measure electrical resistance
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is electrical power defined in the context of transformers?
As the energy stored in a magnetic field
As the energy transferred by a circuit per second
As the voltage drop across a resistor
As the resistance of a circuit
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to the current in a step-up transformer?
It increases
It remains the same
It fluctuates
It decreases
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a step-down transformer, how does the number of turns on the primary coil compare to the secondary coil?
The primary coil has more turns
The primary coil has fewer turns
Both coils have the same number of turns
The number of turns varies randomly
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does a step-up transformer affect the potential difference?
It reverses the potential difference
It keeps the potential difference constant
It increases the potential difference
It decreases the potential difference
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main reason for using a high potential difference in the National Grid?
To increase the current in the cables
To decrease the voltage for home use
To reduce power loss due to resistive heating
To increase the speed of electricity
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of step-down transformers in the National Grid?
To decrease the potential difference for homes and businesses
To increase the potential difference for factories
To maintain a constant potential difference
To convert AC to DC
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