is a wire of uniform resistance. The galvanometer
shows no current when the length
and
The resistance
is equal to
a) |
|
b) |
|
c) |
|
d) |
|
is a wire of uniform resistance. The galvanometer
shows no current when the length
and
The resistance
is equal to
a) |
|
b) |
|
c) |
|
d) |
|
A heater coil is cut into two parts of equal length and one of them is used in the heater. The ratio of the heat produced by this half coil to that by the original coil is |
|||||||
a) |
2 :1 |
b) |
1 :2 |
c) |
1 :4 |
d) |
4 :1 |
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