A resistance R of therimal coefficient of resistivity `alpha` is connected in parallel with a resistance 3R. Having thermal coeffiecinet of resistivity `2alpha` Find the value of `alpha_(eff)`

A resistance R_(1) of thermal coefficient of resistivity a is connected in parallel with resistance R_(2) having thermal coefficient of resistivity 3a .If the value of effective thermal coefficient of resistivity is (7 alpha)/(3) , then value of (R_(1))/(R_(2)) is

Two resistance R1 and R2 connected in parallel, this equivalent resistance is.

A wire of cross-section area A , length L_(1) , resistivity rho_(1) and temperature coefficient of resistivity alpha_(1) is connected in series to a second wire of length L_(2) , resistivity rho_(2) temperature coefficient of resistivity alpha_(2) and the same area A , so that wires carry same current. Total resistance R is independent of temperature for small temperature change if (Thermal expansion effect is negligible)

If a resistance R_(2) is connected in parallel with the resistance R in the circuit shown, then possible value of current through R and the possible value of R_(2) will be

If resistors of resistance R_(1) and R_(2) are connected in parallel,then resultant resistance is "

Three identical resistors are connected in parallel and total resistance of the circuit is R/3. Find the value of each resistance.

Four resistance R_1,R_2,R_3 and R_4 are connected in parallel. The resultant resistance R is

Two wires are of same length and same area of cross-section. If first wire has resistivity rho_1 and temperature coefficient of resistance alpha_1 but second wire has resistivity rho_2 and temperature coefficient of resistance alpha_2 . Their series equivalent resistance is independent of small temperature changes. Then

It was found that resistance of a cylindrical specimen of a wire does not change with small change in temperature. If its temperature coefficient of resistivity is alpha_(R) then find its thermal expansion coefficient (alpha) .