A fuse wire with a radius of 1 mm blows at 1.5 A. If the fuse wire of the same material should blow at 3.0 A, the radius of the fuse wire must be
a)
mm
b)
mm
c)
0.5 mm
d)
8.0 mm
A fuse wire with a radius of 1 mm blows at 1.5 A. If the fuse wire of the same material should blow at 3.0 A, the radius of the fuse wire must be
a)
mm
b)
mm
c)
0.5 mm
d)
8.0 mm
Question ID - 150232 | SaraNextGen Top Answer
A fuse wire with a radius of 1 mm blows at 1.5 A. If the fuse wire of the same material should blow at 3.0 A, the radius of the fuse wire must be
a)
mm
b)
mm
c)
0.5 mm
d)
8.0 mm
|
A fuse wire with a radius of 1 mm blows at 1.5 A. If the fuse wire of the same material should blow at 3.0 A, the radius of the fuse wire must be |
|||||||
|
a) |
|
b) |
|
c) |
0.5 mm |
d) |
8.0 mm |
1 Answer
127 votes
Answer Key / Explanation : (a) -
|
(a) The temperature of the wire increases to such a value at which, the heat produced per second equals heat lost per second due to radiation
Hence, So
|
,
, where 
is heat lost per second per unit area due to radiation.
mm.127 votes
Answer Link
127