A long solenoid of radius R carries a time dependent current `I = I_(0) t(1 – t)`. A ring of radius 2R is placed coaxially near its centre. During the time interval`0 le t le 1`, the induced current `I_(R)` and the induced emf VR in the ring vary as:

Options

A. Direction of ` I _R ` remains unchanged and ` V _ R ` is maximum at ` t = 0.5 `
B. At t = 0.5 direction of ` I _ R ` reverses and ` V _ R ` is zero
C. At t =0.25 direction of ` I _ R ` reverses and ` V _ R ` is maximum
D. Direction of ` I _ R ` remains unchanged and ` V_R ` is zero at t = 0.25

Answer

2