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?

The electric potential along the x-axis is V = 100e-2x V, where x is in meters. a) What is the Ex at x = 1.0 m? b) What is the Ex at x = 2.9 m?

What potential difference is needed to accelerate a He+ ion (charge +e, mass 4 u) from rest to a speed of 1.4 x 106 m/s? (mass of a proton = 1.67 x 10-27 kg, charge of electron = 1.6 x 10-19 C)

A 1.00 

In the figure shown below, q = -3.4 nC. What is the electric potential at the point indicated with the black dot? Make sure to include units. 

In the figure shown below, q = -1.0 nC. What is the electric potential at the point indicated with the black dot? Make sure to include units.