A(^82) Aptitude Test Problems in Physics
Determine the current I in the leads if
their resistance can be neglected.
3.26*. Determine the resistance R AB be-
tween points A and B of the frame formed by
nine identical wires of resistance R each
(Fig. 84).
Fig. 84
3.27. Determine the resistance R AB be-
tween points A and B of the frame made of
thin homogeneous wire (Fig. 85), assuming
1-; a
Fig. 85
that the number of successively embedded
equilateral triangles (with sides decreasing
by half) tends to infinity. Side AB is equal
to a, and the resistance of unit length of the
wire is p.