An electric heater consists of 20m length of manganin wire of 0.23 `m^(2)` cross-sectional area. Calculate the wattage of the heater when a potential difference of 200V is applied across it. Resistivity of magnanin =`4.6xx10^(-7)Omega`m.

An electric heater consists of 10m long nichrome wire of 2.5xx10^(-6)m^(2) corss-sectional area. Calculate the wattage of the heater, when the potential difference across the heater is 200V. Given that the resistivity of nichorme =1.1xx10^(-6)Omega m.

An electric heater consists of 10m long nichrome wire of 2.5xx10^(-6)m^(2) corss-sectional area. Calculate the wattage of the heater, when the potential difference across the heater is 200V. Given that the resistivity of nichorme =1.1xx10^(-6)Omega m.

Calculate the heat in joules, generated in a coil of resistance 400 'omega' in 2 minutes when a potential difference of 200 V is applied to it.

Calculate the heat in joules, generated in a coil of resistance 400 'omega' in 2 minutes when a potential difference of 200 V is applied to it.

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10 Omega when a potential difference of 20 V is applied between its ends

Calculate the resistance of an aluminium wire of length 50 cmand cross sectional area 2.0mm^(2) . The resistivity of aluminium is (rho)=2.6xx10^(-8)(Omega)m.

Calculate the area of cross-section of a wire if its length is .0 m , its resistance is 23 Omega and the resistivity of the material is 1.84 xx 10^-6 Omega m .

Calculate the electric field in a copper wire of cross-sectional area 2.0 mm^(2) carrying a current of 1 A. The resistivity of copper =1.7xx10^(-8) Omega m.