Metre Bridge-Resistance of a wire
 1) What is the best material used for making connecting wires? Tungsten Nichrome Constantan Copper

 2) Conductivity is the reciprocal of _________. Capacitance Resistivity Conductance Specific resistance

 3) Two wires A and B are made of same material has equal length and A is having twice the area of B. Which of the following is true in this case? Resistance of B is greater than that of A Resistance cannot be predicted Resistances of A is greater than that of B Resistances of both A and B are equal

 4) A wire has resistivity ρ, its length is doubled and its area of cross section is halved. What will be the new value of resistivity of the wire? 2ρ ρ/2 4ρ ρ

 5) The resistance of the conductor of unit length and unit area of cross section is called? Conductivity Specific resistance Conductance Capacitance

 6) Calculate the resistance of a copper wire of 50 m long and diameter 1 mm. Resistivity of copper is 1.7 x 10-8 Ωm. 108 Ω 1.08 Ω 0.108 Ω 10.8 Ω

 7) Find the resistivity of the material of a wire of length 1 m and diameter 2mm, if its resistance is 16 ohms. 16π x 10⁻⁷ Ωm 4 π x 10⁻⁷ Ωm 4π x 10⁻⁶ Ωm 16π x 10⁻⁶ Ωm

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