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State Lenz’s law. - Physics

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प्रश्न

State Lenz’s law.

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उत्तर

Lenz’s law states that the direction of the induced current is such that it always opposes the cause responsible for its production.

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अध्याय 4: Electromagnetic Induction And Alternating Current - Evaluation [पृष्ठ २६०]

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सामाचीर कलवी Physics - Volume 1 and 2 [English] Class 12 TN Board
अध्याय 4 Electromagnetic Induction And Alternating Current
Evaluation | Q II. 3. | पृष्ठ २६०

संबंधित प्रश्न

The most suitable material for making the core of an electromagnet is:

(a) soft iron
(b) brass
(c) aluminium
(d) steel


Welders wear special glass goggles while working. Why? Explain.


The switches in figure (a) and (b) are closed at t = 0 and reopened after a long time at t = t0.

(a) The charge on C just after t = 0 is εC.
(b) The charge on C long after t = 0 is εC.
(c) The current in L just before t = t0 is ε/R.
(d) The current in L long after t = t0 is ε/R.


Complete the following diagram of a transformer and name the parts labeled A and B. Name the part you have drawn to complete the diagram . What is the material of this part? In this transformer a step-up or step-down? Why?


List two ways of increasing the strength of an electromagnet if the material of the electromagnet is fixed.


The energy stored in a 50 mH inductor carrying a current of 4 A is ______ 


The condition for the praenomen of electromagnetic induction is that there must be a relative motion between ____________.


Ansari Sir was demonstrating an experiment in his class with the setup as shown in the figure below.

A magnet is attached to a spring. The magnet can go in and out of the stationary coil. He lifted the Magnet and released it to make it oscillate through the coil.
Based on your understanding of the phenomenon, answer the following question.

What will be observed when the Magnet starts oscillating through the coil. Explain the reason behind this observation.


Which of the following phenomena makes use of electromagnetic induction?


The primary of a transformer has 400 turns while the secondary has 2000 turns. If the power output from the secondary at 1000 Vis 12 kW, what is the primary voltage?


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