Electric current

The picture tube in a particular television draws a current of 15A. How many electrons strike the viewing screen every second?

Electric Current

A car battery does 260 J if work on the charge passing through it as it starts an engine. (a) If the emf on the battery is 12 V, how much charge passes through the battery during the start? (b) If the emf is doubled to 24 V, does the amount of charge passing through the battery increase or decrease? By what factor?

Electric Current

A highly sensitive ammeters can measure currents as small as 10.0 fA. How many electrons per second flow through a wire with a 10.0 fA current?

Electric Current

A television set connected to a 120-V outlet consumes 85 W of power. (a) How much current flows through the television? (b) How long does it take for 10 million electrons to pass through the TV?

Electric Charge

Find the total electric charge of 1 kg of (a) electrons and (b) protons.

Coulomb's Law

Given that q=+12 micro C and d = 16 cm, find the direction and magnitude of the net electrostatic force exerted on the point charge q1 in the attached drawing

Coulomb's Law

Find the direction and magnitude of the net electrostatic force exerted on the(a) point charge q2 in the attached drawing. Let q = +2.4 micro C and d = 33 cm. (b) Find the direction and magnitude of the net electrostatic force exerted on the point charge q3 in the drawing. Let q = +2.4 micro C and d = 33 cm. (c) How would the ...continues

The Electric Field

What is the magnitude of the electric field produced by a charge of magnitude 5.00 micro C at a distance of (a) 1.00 m and (b) 2.00 m?

The Electric Field

A + 5.0 micro C charge experiences a 0.20 N force in the positive y direction. If this charge is replaced with a -2.7 micro C charge, what force will it experience?

The Electric Field

Two point charges lie on the x axis. A charge of + 6.2 micro C is at the origin, and a charge of -9.5 micro C is at x = 10.0 cm. What is the net electric field at (a) x = -4.0 cm and at (b) x = +4.0 cm?