A steel rod `(Y = 2.0 xx 10^11 N m^-2)` and `alpha = 10^-5 ^@C^-1)` of length 1 m and area of cross-section ` 1 cm62` is heated form `0 ^@C` to ` 200 ^@C`, without being allowed to extend or bend. What is the tension produced in the rod?

A metal rod of length 10 cm and a rectangular cross-section of 1 cm xx 1/2 cm is connected to a battery across opposite faces. The resistance will be:

Find the resistance of a nichrome wire of length 1m and area of cross-section 4mm^(2) . rho(nichrome)= 100xx10^(-6)Ohm-m .

Find the resistance of an ebonite rod of length 1m and area of cross section 2mm^(2) .The resistance of ebonite = 10^(16)Ohm-m .

A wire of length15m (meter) and uniform area of cross section 6.0 xx 10^-7 m^2 has resistance of 5.0 Omega (ohm). What is the resistivity of the material of the wire ?

Calculate the conductivity of a wire of length 200 cm, area of cross-section 2cm^2 and of resistane 5xx10^4Omega .

A closely wound solenoid of 2000 turns and area of cross-section 1.6 xx 10^1 m^2 . carrying a current of 4.0 A, is suspended through its centre allowing it to turn in a horizontal plane. What is the magnetic moment associated with the solenoid?

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 one metre long wire having area of cross-section 1 mm^2 is stretched by a mass of 3 kg. Calculate the increase in length. Take Y = 2 xx 10^11 N m^-2