Home
Class 12
PHYSICS
A 2 m long metallic rod rotates with an ...

A 2 m long metallic rod rotates with an angular frequency `200 rad s^(-1)` about on axis normal to the rod passing through its one end. The other end of the rod is in contact with a circular metallic ring. A constant magnetic field of `0.5 T` parallel to axis exists everywhere. The emf developed between the centre and the ring is

A

100V

B

200V

C

300V

D

400V

Text Solution

Verified by Experts

The correct Answer is:
B
The emf developed between the centre and the rings is
`epsi=(1)/(2)Bl^(2)omega=(0.5xx2^(2)xx200)/(2)=200V`
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    NCERT FINGERTIPS|Exercise Energy Consideration : A Quantitative Study|4 Videos

  • ELECTROMAGNETIC INDUCTION

    NCERT FINGERTIPS|Exercise Eddy Currents|4 Videos

  • ELECTROMAGNETIC INDUCTION

    NCERT FINGERTIPS|Exercise MCQs|2 Videos

  • ELECTRIC CHARGES AND FIELDS

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

  • ELECTROMAGNETIC WAVES

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos