A conducting ring of radius r is placed perpendicularly

Asked by admin @ 23/08/2021 in Physics viewed by 305 People

a conducting ring of radius r is placed perpendicularly inside a time varying magnetic field given by B=Bi+ alpha•t. Bi and alpha are positive constant.Emf induced in the ring is

Answered by admin @ 23/08/2021

Induced emf = -d(phi)/dt = -d(B*A)/dt = -A dB/dt =-A*Bi*alpha
A =pi*r^2

A wheel of radius r is placed on ground

Asked by admin @ 20/08/2021 in Physics viewed by 400 persons

A wheel of radius R is placed on ground and its contact point is P. if wheel starts rolling without slipping and completes half a revolution, find the displacement if …

A metal ball of radius r is placed concentrically

Asked by admin @ 17/08/2021 in Physics viewed by 370 persons

A metal ball of radius `r` is placed concentrically inside hollow metal sphere of inner radius `2r` and outer radius `3r`.The ball is given a charge `+2q` and the hollow …

Radius of a circular loop placed in a perpendicular

Asked by admin @ 17/08/2021 in Physics viewed by 308 persons

Radius of a circular loop placed in a perpendicular uniform magnetic field is increasing at a constant rate of r metre per second if at any instant radius of the …

Two thin wire rings each having a radius r

Asked by admin @ 13/08/2021 in Physics viewed by 336 persons

Two thin wire rings each having a radius r are placed at a distance d apart with their axes coinciding. the charges on the two rings are +q and -q. …

A non conducting ring is of radius 0.5 m

Asked by admin @ 23/08/2021 in Physics viewed by 288 persons

A non conducting ring of radius 0.5 m carries a total charge

A 5 cm tall object is placed perpendicular

Asked by admin @ 31/08/2021 in Physics viewed by 300 persons

. A 5 cm tall object is placed perpendicular to the principal axis of a convex lens of focal- length 20 cm. The distance of the object from the len …

A 2 cm tall object is placed perpendicular

Asked by admin @ 31/08/2021 in Physics viewed by 280 persons

A 2 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 10 cm. The distance of the object from the lens is …

A wire of length l and radius r

Asked by admin @ 31/08/2021 in Physics viewed by 309 persons

A wire of length l radius r is stretched by a force f and a second wire of same material with kength 2l and radius 2r is stretched with a …

A 6 cm tall object is placed perpendicular

Asked by admin @ 29/08/2021 in Physics viewed by 280 persons

a 6 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 15cm .the distance of the object from the lens is 10cm. …

A 2.0 cm tall object is placed perpendicular

Asked by admin @ 29/08/2021 in Physics viewed by 301 persons

A 2 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 10 cm. The distance of the object from the lens is …

A circular hoop of mass m and radius r

Asked by admin @ 23/08/2021 in Physics viewed by 347 persons

A circular hoop of mass m and radius R rests flat on a horizontal frictionless surface. A bullet also of mass m, and moving with a velocity v, strikes the …

A circular disc of radius 0.2 m is placed

Asked by admin @ 23/08/2021 in Physics viewed by 316 persons

18. A circular disc of radius 0.2 m is placed in a uniform magnetic field of induction = 1/π Wb/m2 in such a waythat its axis makes an angle …

Twenty seven solid iron spheres each of radius r

Asked by admin @ 20/08/2021 in Math viewed by 298 persons

"Question 9 Twenty seven solid iron spheres, each of radius r and surface area S are melted to form a sphere with surface area S'. Find the (i) radius r' …

A spherical ball of mass m and radius r

Asked by admin @ 20/08/2021 in Physics viewed by 310 persons

A spherical ball of mass m and radius r rolls without slipping on a rough concave surface of large radius R. It makes small oscillation about the lowest point. Find …

A round balloon of radius r subtends an angle

Asked by admin @ 20/08/2021 in Math viewed by 283 persons

A round balloon of radius 'r' subtends an angle 'alpha' at the eye of the observer while the angle of elevation of its centre is beta. Prove the height of …