1
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
Change Language
A thin semicircular conducting ring (PQR) of radius r is falling with its plane vertical in a horizontal magnetic field B, as shown in the figure.

AIPMT 2014 Physics - Electromagnetic Induction Question 23 English
The potential difference developed across the ring when its speed is $$v$$, is
A
zero
B
$${{Bv\pi {r^2}} \over 2}$$ and P is at higher potential
C
$$\pi rBV$$ and R is at higher potential
D
2rBV and R is at higher potential
2
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Change Language
A current of 2.5 A flows through a coil of inductance 5 H. The magnetic flux linked with the coil is
A
0.5 Wb
B
12.5 Wb
C
zero
D
2 Wb
3
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Change Language
A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced e.m.f. is
A
four times per revoluation
B
six times per revolution
C
once per revolution
D
twice per revolution
4
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
Change Language
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

AIPMT 2012 Mains Physics - Electromagnetic Induction Question 19 English
A
8
B
2
C
6
D
4
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