JEE Main 7 Jan 2020 Shift 1 Solved Paper

Section: Physics

Question : 3 of 75

Marks: +1, -0

A long solenoid of radius R carries a time (t)-dependent current I(t)=I0t(1−t). A ring of radius 2R is placed coaxially near its middle. During the time interval 0≤t≤1, the induced current (IR) and the induced EMF(VR) in the ring change as :

[7-Jan-2020 Shift 1]

At t = 0.5 direction of IR reverses and VR is zero
Direction of IR remains unchanged and VR is zero at t = 0.25
Direction of IR remains unchanged and VR is maximum at t = 0.5
At t = 0.25 direction of IR reverses and VR is maximum

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