The voltage across the terminals of a 9.0 V battery is 8.1 V when the battery is connected to a 20 

The voltage across the terminals of a 9.0 V battery is 8.1 V when the battery is connected to a 45

The voltage across the terminals of a 9.0 V battery is 8.3 V when the battery is connected to a 45

Phase angle: The phase angle of an LRC series circuit with an inductive reactance of 200 Ω and a capacitive reactance of 100 Ω is 40.0°. What is the value of the resistor in this circuit?

Household wiring often uses 2.0 mm diameter copper wires. The wires can get rather long as they snake through the walls from the fuse box to the farthest corners of your house. What is the potential difference across a 17 m long, 2.0 mm diameter copper wire carrying an 8.5 A current?  (Resistivity of copper = 1.7 x 10-8 

a) How long must a 0.52 mm diameter aluminum wire be to have a 0.44 A current when connected to the terminals of a 1.5 V flashlight battery? (Resistivity of aluminum = 2.8 x 10-8

A water molecule perpendicular to an electric field has 3.70×10−22 J more potential energy than a water molecule aligned with the field. The dipole moment of a water molecule is 6.2 x 10-30 Cm. What is the strength of the electric field?

Two 5.6 cm x 5.6 cm metal plates are separated by a 0.19 mm thick piece of Teflon. (Dielectric constant for Teflon (

A student wants to make a very small particle accelerator using a 5.8 V battery. a) What speed will a proton have after being accelerated from rest through the 5.8  V potential difference? b) What speed will an electron have after being accelerated from rest through the 5.8  V potential difference?

The current in a 100 watt lightbulb is 0.80 A. The filament inside the bulb is 0.10 mm in diameter. a) What is the current density of the filament? b) What is the electron current in the filament, in electrons per second?