Question 19411
R=ST/(S+T)
Now if they have the same value,S=T
R=T*T(T+T)=(T^2/2T)
So the resistance would be (T^2/2T)
<P>
To find how many times it is greater than T alone,find the ratio:
Let the ratio be x
{{{((T^2/2T))/T=x}}}
{{{(T^2/2T)*(1/T)=x}}}
{{{(T^2/2T^2)=x}}}
{{{1/2=x}}}
therefore our ratio is (1/2)
<P>
Thats your answer.
Hope this helps,
Prabhat