Two resistance `R_(1)` and `R_(2)` are made of different material. The temperature coefficient of the material of `R_(1)` is `alpha` and of the material of `R_(2)` is `-beta`. Then resistance of the series combination of `R_(1)` and `R_(2)` will not change with temperature, if `R_(1)//R_(2)` will not changee with temperature if `R_(1)//R_(2)` equals

Two resistances R_1 and R_2 are made of different materials. The temperature coefficient of the material of R_1 is alpha and of the material of R_2 is -beta . The resistance of the series combination of R_1 and R_2 will not change with temperature, if R_1//R_2 equals.

Two spheres of radii R_(1) and R_(2) are made of the same material and are at the same temperature. The ratio of their thermal capacities is:

Two resistances r_1 and r_2 (r_1 < r_2) are joined in parallel. The equivalent resistance R is such that

The temperature coefficient of resistance for two material A and B are 0.0031^(@)C^(-1) and 0.0068^(@)C^(-1) respectively .Two resistance R_(1) and R_(2) made from material A and B respectively . Have resistance of 200 Omega and 100 Omega at 0^(@)C . Show as a diagram the colour cube of a carbon resistance that would have a resistance equal to the series combination of R_(1) and R_(2) at a temperature of 100^(@)C (Neglect the ring corresponding to the tolerance of the carbon resistor)

The temperature coefficient of resistance for two material A and B are 0.0031^(@)C and 0.0068^(@)C^(-1) respectively .Two resistance R_(1) and R_(2) made from material A and B respectively . Have resistance of 200 Omega and 100 Omega at 0^(@)C . Show as a diagram the colour cube of a carbon resistance that would have a resistance equal to the series combination of r_(1) and R_(2) at a temperature of 100^(@)C (Neglect the ring corresponding to the tolerance of the carbon resistor)

Two resistance R_(1) = 50 pm 2 ohm and R_(2) = 60 ohm connected in series , the equivalent resistance of the series combination in

Two spherical black bodies of radii R_(1) and R_(2) and with surface temperature T_(1) and T_(2) respectively radiate the same power. R_(1)//R_(2) must be equal to