solve the following

Solve the following. 1. If wire has 1.25 x I016 electrons owing through its cross- section in one second, what is the current in the wire. 2. How much current is owing when 15 C pass a specied point in 5 s? 3. An electric motor winding uses 180 m of copper conductor with a cross-sectional area of 0.26 c1112. Find the resistance of the electric winding at 20C. The resistivity of copper is 1.72 x 10'8 Q-m. 1. What is the resistance of a lamp which allows 0.8 A current when 1 10.0 V is applied to it? 5. The heating element in a clothes dryer is rated at 5 Kw and 220 V. How much current does it draw? 5. A potential difference of 9 V is maintained across a conductor in a circuit. If the conductor has a resistance of 10 ohms, how many electrons flow through the conductor' 5 cross-section in 5 seconds? 7. A piece of material with a square cross-section measuring 1 mm on each side has a length of l m. What is the resistance of this material if it were made of aluminium? Fused quartz? Finally, calculate the current through each piece of material if a potential difference of 1 volt is applied over its length. B. An electrical device with a potential diHerence of 15 V across its ends provides energy at a rate of 723 W. (a) W' hat is its resistance? (b) What is the current in the resistor