1
JEE Main 2020 (Online) 7th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
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 $$ \le $$ t $$ \le $$ 1, the induced current (IR) and the induced EMF(VR) in the ring change as :
A
Direction of IR remains unchanged and VR is zero at t = 0.25
B
Direction of IR remains unchanged and VR is maximum at t = 0.5
C
At t = 0.25 direction of IR reverses and VR is maximum
D
At t = 0.5 direction of IR reverses and VR is zero
2
JEE Main 2019 (Online) 12th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The figure shows a square loop L of side 5 cm which is connected to a network of resistances. The whole setup is moving towards right with a constant speed of 1 cm s-1. At some instant, a part of L is in a uniform magnetic field of 1 T, perpendicular to the plane of the loop. If the resistance of L is 1.7 $$\Omega $$, the current in the loop at that instant will be close to : JEE Main 2019 (Online) 12th April Morning Slot Physics - Electromagnetic Induction Question 87 English
A
115 $$\mu $$A
B
170 $$\mu $$A
C
60 $$\mu $$A
D
150 $$\mu $$A
3
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Two coils 'P' and 'Q' are separated by some distance. When a current of 3 A flows through coil 'P', a magnetic flux of 10–3 Wb passes through 'Q'. No current is passed through 'Q'. When no current passes through 'P' and a current of 2 A passes through 'Q', the flux through 'P' is :-
A
3.67 × 10–4 Wb
B
3.67 × 10–3 Wb
C
6.67 × 10–4 Wb
D
6.67 × 10–3 Wb
4
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A very long solenoid of radius R is carrying current I(t) = kte–at(k > 0), as a function of time (t $$ \ge $$ 0). counter clockwise current is taken to be positive. A circular conducting coil of radius 2R is placed in the equatorial plane of the solenoid and concentric with the solenoid. The current induced in the outer coil is correctly depicted, as a function of time, by :-
A
JEE Main 2019 (Online) 9th April Evening Slot Physics - Electromagnetic Induction Question 88 English Option 1
B
JEE Main 2019 (Online) 9th April Evening Slot Physics - Electromagnetic Induction Question 88 English Option 2
C
JEE Main 2019 (Online) 9th April Evening Slot Physics - Electromagnetic Induction Question 88 English Option 3
D
JEE Main 2019 (Online) 9th April Evening Slot Physics - Electromagnetic Induction Question 88 English Option 4
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