Home
Class 12
PHYSICS
A wire is bent to form a semi-circle of ...

A wire is bent to form a semi-circle of radius a. The wire rotates about its one end with angular velocity `omega`. Axis of rotation being perpendicular to plane of the semicircle. In the space, a uniform magnetic field of induction exists along the axis of rotation as shown. The correct statement is

A

potential difference between P and Q is equal to `2Bomegaa^(2)`

B

potential difference between P and Q is equal to `2pi^(2)Bomegaa^(2)`

C

P is at higher potential than Q

D

potential difference between P and Q is zero.

Text Solution

Verified by Experts

The correct Answer is:
A
`E=1/2Bl^(2)omega=1/2B(2a)^(2)omega=2Bomegaa^(2)`
Promotional Banner

Similar Questions

Explore conceptually related problems

A wire is bent to form a semicircle of the radius a. The wire rotates about its one end with angular velocity omega . Axis of rotation is perpendicular to the plane of the semicircle . In the space , a uniform magnetic field of induction B exists along the aixs of rotation as shown in the figure . Then -

a semicircle wire of radius R is rotated with constant angular velocity about an axis passing through one end and perpendicular to the plane of wire. There is a uniform magnetic field of strength B . The induced emf between the ends is

A circular wire of radius r rotates about its own axis with angular speed w in a magnetic field B perpendicular to its plane, then the induced e.m.f. is

A ring of mass m and radius R is being rotated about its axis with angular velocity omega . If a increases then tension in ring

A wire is in the form of a semicircle of radius r . One end is attached to an axis about which it rotates with an angular speed omega . The axis is normal to the plane of the semicircle. The wire is immersed in a uniform magnetic field B parallel to the axis. find the induced emf between points o and P of the semicircle.

In a uniform magneitc field of induced B a wire in the form of a semicircle of radius r rotates about the diameter of the circle with an angular frequency omega . The axis of rotation is perpendicular to the field. If the total resistance of the circuit is R, the mean power generated per period of rotation is

A rod is rotating with angular velocity omega about axis AB. Find costheta .

A solid cylinder of mass M and radius R rotates about its axis with angular speed omega . Its rotational kinetic energy is

A ring rotates with angular velocity omega about an axis perpendicular to the plane of the ring passing through the center of the ring.A constant magnetic field B exists parallel to the axis.Find the emf induced in the ring.