A negligibly small current is passed through a wire of length 15 m and uniform across-section `6.0 xx 10 ^(-7) m ^(2),` and its resistance is measured to be `5.0Omega` What is the resistivity of the material at the temperature of the experiment ?

A negligibly small current is passed through a wire of length 20 m and uniform cross-section 6.0 xx 10^(7) m^(2) , and its resistance is measured to be 10.0 Omega . What is the resistivity of the material at the temperature of the experiment ?

A circle of 2.5 meter radius is made using a wire of uniform cross section and resistivity 1 m^(2) . If resistance of this wire is 10 pi Omega resistivity of the material of the wire is ........

A steel wire of length 4.7 m and cross-sectional area 3.0 xx 10 ^(-5) m ^(2) stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of 4.0 xx 10 ^(-5) m ^(2) under a given load. What is the ratio of the Young's modulus of steel to that of copper ?

A steet wire of length 4.7 m and cross - sectional area 3.0xx10^(-5)m^(2) stretches by the same amount as a copper wire of length 3.5 m and cross- sectional area of 4.0xx10^(-5)m^(2) under a given load. What is the ratio of the Young's modulus of steel to that of copper ?

The resistance of 300 m long wire with cross-sectional area 10^(-6)m^2 and resistivity 10^(-7) Omegam is …………… .

Work done in stretching a wire of length 1 m and of cross-sectional area 1 mm^(2) through 2 mm if Young's modulus of the material of the wire is 2 xx 10 ^(11) N//m^(2) is .......

Resistance of a metal wire of length 1m is 26 Omega" at " 20^@C .If the diameter of the wire is 0.3mm, what will be the resistively fo the metal at that temperature ? Using Table 2 (on page 116), predict the material of the wire.

A mild steel wire of length 1.0 m and cross sectional area 0.50 xx 10 ^(-2) cm^(2) is stretched, well within its elastic limit, horizontally between two pillars. A mass of 100 g is suspended from the mid-point of the wire. Calculate the depression at the midpoint.

For a block with dlmensions 1 cm xx 1 cm xx 100 cm havng resistivity 3 xx 10^(-7) Omega m, find its resistance between two rectangular sides.

A steel wire of length 1 m and mass 0.1 kg and having a uniform cross-sectional area of 10^(-6) m^(2) is rigidly fixed at both ends. The temperature of the wire is lowered by 20^(@)C . If the wire is vibrating in fundamental mode, find the frequency (in Hz). (Y_(steel)=2xx 10^(11) N//m^(2),alpha_(steel)=1.21 xx 10^(-5)//.^(@)C) .