Resistors and Ohm's Law Practice Problems

An experimental procedure states that you assemble the circuit shown below using two non-ideal batteries and three resistors. Determine the potential drop V_ps across points p and s. 

An aluminum cable used in alow voltage power line has seven 4.8 mm diameter strands and transmits 430 A of electric current. If the length of the wire is 1.3 km, determine the amount of energy lost as heat each day.

A heating element made of tungsten has a resistance of 40.0 Ω at 600°C. Determine its resistance when the temperature is 10°C.

A copper pipe is 5.0 m long. The outer diameter is 5.125 inches, while the inner diameter is 4.805 inches. What is the resistance of the pipe when measured i) along its length ii) along its wall thickness? Assumes each area acts like an equipotential surface.

 An aluminum solid wire has a diameter of 2.91 mm. Several wires are usually bundled to form a transmission cable. Determine the resistance of a 1.20 km long wire.

A rod has a resistance R. A craftsman fabricates the rod to create a new rod that has 4 times the length of the original rod. Assuming the new rod has the same density and resistivity, and all material is conserved, determine the rod's resistance in terms of R.

A 1.00 m long nichrome wire with a circular cross-section of diameter 0.800 mm is used for a resistance experiment. A constant current equal to 0.820 A flows through the wire at temperatures between 18°C and 75°C. Determine the greatest potential difference recorded over the entire length of the wire.