Nichrome wire of cross-sectional radius 0.791 mm is to be used in winding a heating coil. If the coil must carry a current of 9.25 A when a voltage of 1.20 × 102 Ω is applied across its ends, find (a) the required resistance of the coil and (b) the length of wire you must use to wind the coil

If one wants to design a 1500 W electrical heater that consists of a resistor R with V = 208 V across it, what value should be chosen for R?

Nichrome wire of cross-sectional radius 0.795 mm is to be used in winding a heating coil. If the coil must carry a current of 9.00 A when a voltage of 3.00 × 102 V is applied across its ends, find the following. (a) the required resistance of the coil (b) the length of wire you must use to wind the coil m

A 50.0 m long Aluminum wire has a diameter of 0.50 mm and is at 20.0°C. If it carries a current of 0.50 mA, (a) calculate the power delivered to it? (b) If the temperature is increased to 340°C and the potential difference across the wire remains constant, what is the power delivered?

(a) What energy is dissipated by a lightning bolt having a 21,000 A current, a voltage of 121 MV, and a time duration of 1.00 ms? (b) What mass of tree sap could be raised from 18.0°C to its boiling point and then evaporated by this energy, assuming sap has the same thermal characteristics as water with a specific heat of 4184 J/(kg · °C) and a latent heat of vaporization of 2256 x 103 J/kg? kg