Physics
A copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be

4 R/5
5 R/4
5 R
R/5

ANSWER DOWNLOAD EXAMIANS APP

Physics
The nature of fuse wire is

Low resistance and low melting point.
High resistance and high melting point.
High resistance and low melting point.
Low resistance and high melting point.

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Physics