A carbon filament has resistance of `120Omega` at `0^(@)C` what must be te resistance of a copper filament connected in series with resistance at all temperature
`(alpha_("carbon")=(-5xx10^(-4))/(``^(@)C),alpha_("copper")=(4xx10^(-3))/(``^(C))`

A carbon filament has resistance of 120 Omega at 0^(@)C what must be the resistance of a copper filament connected in series with carbon so that combi-nation has same resistance at all temperatures (alpha_(carbon)=-5 xx 10^(-4)//^(0)C, alpha_(copper)=4 xx 10^(-3)//^(0)C)

A carbon filament has a resistance of 100 Omega " at " 0^(@)C . What must be the resistance of a copper filament placed in series with carbon so that the combination has the same resistance at all temperatures ? Temperature coefficient of resistance of carbon =-0.0007 .^(@)C^(-1) and that of copper is 0.004^(@)C^(-1) .

A carbon and an aluminimum wire are connected in series.If the combination has resistance of 27 ohm at 0^(@)C ,what is the resistance of each wire at 0^(@)C so that the resistance of the combination does not change with temperature ? [alpha_(C ) = -0.5 xx 10^(-3)(.^@C)^(-1) and alpha_(A) = 4 xx 10^(-3)(.^@C)^-1] .

carbon and an aluminimum wire are connected in series.If the combination has resistance of 30Omega at 0^(@)C .The ratio of resistance of aluminimum to carbon at 0^(@)C is x then x= (Here the resistance of combination does not change with temperature) Take alpha_(c)=-0.5times10^(-3) /^(@)c;alpha_(A)=4times10^(-3) /^(@)C

A carbon and an aluminium wire are connected in series . If the combination has equivalent resistance of 90 Omega at 0°C, the value of the resistance of each wire at 0°C so that the resistance of combination does not change with temperature is ( alpha_c=-0.5×10^(-3)°C^(-1) and alpha_Al=-4×10^(-3)°C^(-1) )

A copper coil has resistance of 20.0 Omega at 0^@C and a resistance of 26.4 Omega at 80^@C . Find the temperature coefficient of resistance of copper.

A copper coil has resistance of 20.0 Omega at 0^@C and a resistance of 26.4 Omega at 80^@C . Find the temperature coefficient of resistance of copper.

A carbon and an aluminium wire are connected in series. If the combination has resistance of 30Omega at 30^@C , what is the resistance of each wire at 0^@C so that resistance of the combination does not change with temperature. (a_c=-0.5 times 10^-3//^@C,a_A=4 times 10^-3//^@C )