2. A metallic conductor with resistance 'R' is divided into 3 equal parts. Afterwards these parts are connected in parallel. Its total resistance is R'. Then R : R' is *
Answers
Answered by
2
Answer:
A metallic conductor with resistance 'R' is divided into 3 equal parts. Afterwards these parts are connected in parallel. Its total resistance is R'.
Answered by
1
Answer:
The resistance of a conductor is directly proportional to the length of the conductor. The resistance of the metallic wire, when it is cut into ten parts of equal length is r=
10
R
Two such pieces when joined in series, the equivalent resistance of these two parts
=r+r=2r=
10
2R
.
Series resistance of two parts =2X
10
R
=
5
′
R
5 such elements are connected in parallel. Therefore the total resistance R
′
will be
R
′
1
=
R
1
+
R
1
+
R
1
+
R
1
+
R
1
=
R
25
Hence R
′
=
25
R
.
Similar questions