Q)
(chatquestion)...F,
(3) d
12. Two e
R.
to ea
and
(1) F3-F,+ F2
symr
Whe
(2) F-F,-F2
(3) V(F, -FY +F}
be z
(4) V(F,-F.Y -F?
Charge q is uniformly spread on a thin ring of radius
R. The ring rotates about its axis with a uniform
frequency fHz. The magnitude of magnetic
induction at the center of the ring is
8.
(1)
(3)
Hogf
(2)
2nR
(1)
2TFR
13. A
cu
dia
Hogf
s al inemom
of
2R
2fR
C (1
The magnetic field of given length of wire for single
turn coil at its centre is B then its value for two
9.
(2
turns coil for the same wire is
(-
is
14. L
(1)
ht
4
(4) 2B
re.
(3) 4B
10. A very long straight wire carries a current /. At the
instant when a charge +Q at point P has velocity
v, as shown, the force on the charge is
P.
the
of
Onnosite to Oy
...
