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A square wire loop of side 30cm & wire cross section having diameter 4mm is placed perpendicular to a magnetic field changing at the rate 0.2 T/s. Final induced current in the wire loop. (Given: Resistivity of wire material is (1.23xx10^(-8) ohm m)

A house is fitted with seven tubelights of rating 220 V, 40 W each , two bulbs of rating 220 V, 60 W each, five fans each drawing a current of 0.4 A at 220 V , and a heater of resistance 48.4 Omega . The main line power supplied to the house is at 220 V . Calculate the bill for the month of january if tubelights and bulbs are used for 6 h daily, fans for 1 h daily , and heater for 10 h daily. The electricity is to cost Rs. 2 per unit.

The value of resistance is 10.845 Omega and the current is 3.23 A . On multiplying them , we get the potential difference in terms of significant figures?

A conducting wire of cross-sectional area 1 cm^(2) has 3 xx 10^(23) charge carriers per m3. If wire carries a current of 24 mA , then drift velocity of carriers is

A uniform magnetic field B exist in a direction perpedicuar to the plane of a square loop made of a metal wire. The wire has diameter of 4 mm and a total length of 30 cm . The magnetic field changes with time at a steady rate dB/dt = 0.032 T s^(-1) . The induced current in the loop is close to (Resistivity of the metal wire is 1.23 xx 10^(-8) Omega m )