Q)
(chatquestion)...(a)
(b)
(d) None of these
(c)
(d)
A coil of Cu wire (radius-r, self inductance-L) is bent
in two concentric turns each having radius -
एक
फेर
The
self inductante now
स्वा
(c) 4 L
(d) L/2
Susceptibility of Mg at 300 K is 1.2x10. The
7.
temperature at which susceptibility will be 1.8 x10
ता
is
(a) 450 K
200 K
(c) 375 K
(d) None of these
8.
The magnet of vibration magnetometer is heated so
as to reduce its magnetic moment by 36%. By doing
this the periodic time of the magnetometer will
(a) Increases by 36%
0tincreases by 25%
(c) Decreases by 25%
JMBH
(d) Decreases by 64%
9.
9.
A magnetised wire of moment M is bent into an arc
of a circle subtending an angle of 60° at the centre;
then the new magnetic moment is
(a) (2M/ T)
(b) (M/T)
(c) (33M /R)
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