A circular coil of one turn of radius 5.0cm is rotated about a diameter with a constant angular speed of 80 revolutions per minute.

No No Yes No No Yes Angular momentum and total energy at all points of the orbit of a comet moving in a highly elliptical orbit around the Sun are constant. Its linear speed, angular speed,...

The correct answer is (a) T1 > T2. Explanation: Taking the rod of uniform mass per unit length = m . Mass beyond a distance r from the pivot = m(L-r). And this mass will be...

The correct answer is (b) Explanation:  Moment of inertia of the ring I = Mr²  Angular Momentum = I⍵  When the masses are attached, the moment of Inertia I'= Mr²+2mr²  =(M+2m)r²  Let the new angular speed...

A wheel rotating at a speed of 600 rpm. ω0 = 600 rpm = 10 revolutions per second. T = 10 sec. (In 10 sec. it comes to rest) ω = 0 Therefore ω0 = –αt α...

The correct answer is (a) T1 > T2. Explanation: Taking the rod of uniform mass per unit length = m . Mass beyond a distance r from the pivot = m(L-r). And this mass...

r = 0.5cm = 0.5 × 10–2m B = 0.4T, E = 200V/m The path will straighten, if qE = quB => E = (rqB X B)/m  [∴ r = mv/qB] => E...

n = 50, r = 0.02m A = π × (0.02)2, B = 0.02T i = 5A, μ = niA = 50 × 5 × π × 4 × 10–4 τ is max. when θ = 90° τ = μ × B = μBSin90° = μB...

n = 500, r = 0.02m, θ = 30° i = 1A, B = 4 × 10–1T i = μ × B = μB Sin30° = niABSin30° = 500 × 1 × 3.14 × 4 × 10–4 ×...

dϕ/dt = 8 x 10-4weber n = 200, l = 4A, E = -nL(dl/dt) or, -dϕ/dt = -Ldl/dt or, L = ndϕ/dt = 200 x 8 x10-4 = 2 x 10-2H.

(c) 60 vibrations per minute