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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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पाठ 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
पाठ 4 Electromagnetic Induction And Alternating Current
Evaluation | Q II. 3. | पृष्ठ २६०

संबंधित प्रश्‍न

Electric field intensity in free space at a distance ‘r’ outside the charged conducting sphere of radius ‘R’ in terms of surface charge density ‘ a ’ is............................

(a)`sigma / in_0[R/r]^2`

(b)`in_0/sigma[R/r]^2`

(c)`R/r[sigma/in_0]^2`

(d)`R/sigma[r/in_0]^2`

 


 How does an electromagnet differ forma permanent magnet?  

 


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State whether the following statement are true or false: 

A motor works on the principle electric generator? 


In which of the following case does the electromagnetic induction occur?

A loop of wire is held near a magnet.


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(a) The secondary voltage,
(b) The secondary current, assuming 100% efficiency.


A coil has a self-inductance of 0·05 Henry. Find the magnitude of the emf induced in it when the current flowing through it is changing at the rate of 100 As-1.


A square coil of side 30 cm with 500 turns is kept in a uniform magnetic field of 0.4 T. The plane of the coil is inclined at an angle of 30° to the field. Calculate the magnetic flux through the coil.


The instrument that use to defect electric current in the circuit is known as ____________.


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