In a step-up transformer when the alternating voltage increases then the alternating current:
Correct answer: B. Will decrease
- A. Will increase
- B. Will decrease
- C. Will not change
- D. None of the above
Explanation
In a step-up transformer, the secondary voltage V2 is greater than the primary voltage V1. Since the product of voltage and current is constant, an increase in voltage V2 results in a decrease in current I2 in the secondary coil. The formula is given by:I1V1=I2V2
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
Practise Electromagnetism
1,176 free Electromagnetism MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electromagnetism questions
All the magnetic materials lose their magnetic properties when
Choke coil has
In a metal detector, when a metal object is brought near the search coil, its inductance
The force on electron in electric field of 108 N/C is:
Cause of heat production in a current carrying conductors is:
A short bar magnet having magnetic moment 4 Am², placed in a vibrating magneto meter, vibrates with a time period of 8 seconds. Another short bar magnet having a magnetic moment 8 Am² vibrates with a time period of 6 seconds. If the moment of inertia of the second magnet is 9 x 10^-2kg m² the moment of inertia of the first magnet is (assume that both magnets are kept in the same uniform magnetic induction field)