Back to ELECTRO MAGNETIC INDUCTION

JEE PHYSICS MCQ: ELECTRO MAGNETIC INDUCTION

1 Medium

1 of 1

Analyzing +4 | -1

Statement I: A hanging spring is attached to a battery and switch. On closing the switch a current suddenly flows in the spring, as a result spring compresses.

Statement II: When two current carrying coils are placed close to each other in same plane, then they attract each other if sense of current is same in both.

View answer and explanation

Correct option: A

Statement I is true, Statement II is true; Statement II is
the correct explanation for Statement I

Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I because the current in the spring loops creates magnetic fields that cause attraction, leading to compression.

More Questions from ELECTRO MAGNETIC INDUCTION

Practice All Chapter MCQs →

The current in a long solenoid of radius

R

n

turns per unit length is given by

i=i_0 \sin \omega t

. A coil having

N

turns is wound around it near the centre. Find the induced emf in the coil. The induced emf can be produced in a coil by

A. moving the coil with uniform speed inside
uniform magnetic field

B. moving the coil with non uniform speed inside
uniform magnetic field

C. rotating the coil inside the uniform magnetic
field

D. changing the area of the coil inside the uniform
magnetic field

Choose the correct answer from the options given
below: An inductance coil have the time constant

4 \mathrm{sec}

, if it is cut into two equal parts and connected parallel then new time constant of the circuit- If the coils of a transformer are made up of thick wire, then A loop of area

0.1\,\,{m^2}

rotates with a speed of

\mathrm{60}

rps perpendicular to a magnetic field of

\mathrm{0}\mathrm{.4}\,\,\mathrm{T}

\mathrm{100}

turns in the loop, maximum voltage induced in the loop is A

\mathrm{50}\,\,\mathrm{mH}

coil carries a current of

\mathrm{2 A}

, the energy stored in joule is