Chemistry
Chemistry, 24.09.2019 16:00, sirdre1982

Describe the flow of current through an electric heater when the heater is switched on

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Physics, 07.07.2019 03:00, xxblablaz799
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Physics, 20.08.2019 23:00, milkshakegrande101
An electric heater rated at 4,800 watts is operated on 120 volts. if another heater is connected in parallel with the first one and both operate at 120 volts, the current in the first heater will a instantly become zero b. pemain the same c. increase d. decrease
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Physics, 31.10.2019 07:31, ggpro4life3000
An air heater may be fabricated by coiling nichrome wire and passing air in cross flow over the wire. consider a heater fabricated from wire of diameter d = 2.0 mm, electrical resistivity rho_e = 10^6 ohm middot m, thermal conductivity k = 25 w/m middot k, and emissivity epsilon = 0.2. the heater is designed to deliver air at a temperature of t_infinity = 70.5 degree c under flow conditions that provide a convection coefficient of h = 261 w/m^2 middot k for the wire. the temperature of the housing that encloses the wire and through which the air flows is t_sur = 70.5 degree c. (a) if the maximum allowable temperature of the wire is t_max = 1200 degree c, what is the maximum allowable electric current i? if the maximum available voltage is delta e = 193 v, what is (b) the corresponding length l of wire that may be used in the heater and (c) the power rating of the heater? (a) i_max = a (b) l = m (c) p_elec = kw
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