2. An air conditioner draws 14.0 A at 220-V. The connecting cord is copper wire (resistivity of copper is 1.68 x 10*2 · m) with a diameter of 1.628 mm. a. How much power does the air conditioner draw? b. If the total length of the wire is 15.0 m, how much power is dissipated in the wiring? c. If #12 wire, with a diameter of 2.053 mm, was used instead, how much power would be dissipated in the wiring?

The power dissipated by a resistor with a resistance of R = 100 Q is P 2.0 W. What are the current through the resistor? 9. %3D

A 20 V battery is connected to a resistor. Neglecting the internal resistance of the battery, the power delivered to the resistor is 10 W. The resistance of this resistor is equal to O a. 0.33 N O b.40 N O. 3.0 0 O d. 0.02 0

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A certain person will experience a mild electric shock when the current between two fingers exceeds 72uA. If. The resistance between their thumb and index finger is measured to be 215ohms, how much voltage can be applied before they feel a mild shock? a. 15.5uV b. 33.5uV c. 29.9uV d. 29.9V e.15.5V

What is the maximum power that can be consumed by any combination of the 6.0 Ω and 9.0Ω resistors feeding it with a potential of 18 V? a.22 W b.71 W c.90 W d.54 W e.80 W

Q5. A 4.80-m length of 2.0-mm-diameter wire carries a 750-mA dc current when 22.0 mV is applied to its ends. If the drift velocity is determine 1.7x105 m/s (a) the resistance R of the wire, (b) the resistivity and (c) the number n of free electrons per unit volume.

3. A 60 and a 120 resistor are connected in series with a 36 volt battery,. How many Joules per second are dissipated by the 120 resistor. A. 14 watts B. 24 watts C. 48 watts D. 64 watts

9. a. A 5Q resistor is connected to a 20 V D.C. power supply. Calculate the time for 3000 J of energy to be converted to heat in this resistor. b. Calculate the power output of a 120 Q heater which operates on a 20 V D.C. supply.

1. Consider a cylindrical wire that has conduction electron density 6.0 x 1028 and radius 0.5 mm. An electric field with strength 1 m3 7.5 x 10-4 creates a current of 4.8 × 10" electrons per second. a) What is the average drift speed for an electron? (include units) b) What is the average time in between electron collisions? fs (express your answer in femtoseconds)