YASH CLASSES
6. ELECTRIC CURRENT
56. If the length of wire
is 2 m and
its
diameter
is 2 mm , resistivity of
wire is
20 x
10-8 Ω
. find
resistance .
57. If the length
of wire is 1.
2 m and
its
diameter is 3.5 mm , resistivity of
wire is
10 x 10-8 Ω . find
resistance .
58. If the length
of wire is 2.5
m and
its
diameter is 5 mm
, resistivity of wire
is
50 x 10-8 Ω . find
resistance .
59. If the length
of wire is 1.8 m
and its
diameter
is 3 mm , resistivity of
wire is
28 x 10-8 Ω . find
resistance . If p.d. is
1 A
then
find current .
60. If
the length of
wire is 2.8 m
and its
diameter
is 1.8 mm , resistivity of
wire is
28 x 10-8 Ω . find
resistance . If p.d. is 2.5 A
then
find current .
61. If the length
of wire is 2.7 m
and its
diameter
is 2.7 mm , resistivity of
wire is
28 x 10-8 Ω . find
resistance . If current is
1 A
then find p.d. .
62. If the length
of wire is 5 m
and its
diameter
is 0.5mm , resistivity of
wire is
28 x 10-8 Ω . find
resistance . If current is
5 A
then find p.d. .