In a coil of resistance 10 $$\Omega $$, the induced current developed by changing magnetic flux through it, is shown in figure as a function of time. The magnitude of change in flux through the coil in weber is
A
8
B
2
C
6
D
4
2
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
A coil of resistance 400 $$\Omega $$ is placed in a magnetic field. If the magnetic flux $$\phi $$ (Wb) linked with the coil varies with time t (sec) as $$\phi = 50{t^2} + 4$$.
The current in the coil at t = 2 sec is
A
0.5 A
B
0.1 A
C
2 A
D
1 A
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
The current $$i$$ in a coil varies with time as shown in the figure. The variation of induced emf with time would be
A
B
C
D
4
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
A conducting circular loop is placed in a uniform magnetic field, B = 0.025 T with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of 1 mm s$$-$$1. The induced emf when the radius is 2 cm, is
