Consider a delta connection of resistors and its equivalent star connection as shown below. If all elements of the delta connection are scaled by a factor k, k>0, the element of the corresponding star equivalent will be scaled by a factor of

In figure, Ra, Rb and Rc are 20Ω, 10Ω and 10Ω respectively. The resistance R1, R2 and R3 in Ω of an equivalent star-connection are

For the circuit shown in fig. the capacitance measured between terminals B and Y will be