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Can a Transformer Work When It is Connected to a D.C. Source? Give a Reason. - Physics

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प्रश्न

 Can a transformer work when it is connected to a D.C. source? Give a reason.

एक पंक्ति में उत्तर
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उत्तर

No, a transformer cannot work on a d.c. source. With a d.c. source, there will be no change in magnetic flux linked with the secondary coil.

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अध्याय 4: Current Electricity - Exercise 5 [पृष्ठ २१३]

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फ्रैंक Physics - Part 2 [English] Class 10 ICSE
अध्याय 4 Current Electricity
Exercise 5 | Q 14.3 | पृष्ठ २१३

संबंधित प्रश्न

A solenoid of length 1.5 m and 4 cm in diameter possesses 10 turns per metre. A current of 5 A is flowing through it. The magnetic induction at a point inside the solenoid along the axis is ............................. .

0 = 4π × 10-7 Wb/Am)

  1. π  × 10-5 T
  2. 2π × 10-5 T
  3. 3π × 10-5 T
  4. 4π × 10-5 T

A metal rod `1/sqrtpi `m long rotates about one of its ends perpendicular to a plane whose magnetic induction is 4 x 10-3 T. Calculate the number of revolutions made by the rod per second if the e.m.f. induced between the ends of the rod is 16 mV.


A horizontal straight wire 10 m long extending from east to west is falling with a speed of 5.0 m s−1, at right angles to the horizontal component of the earth’s magnetic field, 0.30 × 10−4 Wb m−2.

  1. What is the instantaneous value of the emf induced in the wire?
  2. What is the direction of the emf?
  3. Which end of the wire is at the higher electrical potential?

  1. What kind of energy change takes place when a magnet is moved towards a coil having a galvanometer at its ends?
  2. Name the phenomenon.

Fleming's left hand rule : electric current : : Fleming's right hand rule : _______


Write the two names in the following diagram.

Right hand thumb rule.


A metal plate can be heated by ______.


What should be the core of an electromagnet?


A current I = 10 sin(100π t) A is passed in first coil, which induces a maximum e.m.f of 5π volt in second coil. The mutual inductance between the coils is ______.


Which type of force is experienced by a moving charge in a magnetic field?


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