4.0.1 2.OA {2.0.2 a) what is the voltage arcoss 4-2? b) what is the total current labeled "I" in the diagram?

Activity 1- Problem Solving          Solve the following problems involving the relationship of current, charges, and time from this equation I=Q/t. Show your complete solution. If a metal wire carries a current of 80.0Ma, how long does it take for 3.00 x electrons to pass a given cross-sectional area of the wire?

Electrons in an X-ray tube are accelerated through 1 .00 102 kV and directed toward a target to produce X-rays. Calculate the power of the electron beam in this tube if it has a current of 15.0 mA.

Can a wire cany a current and still be neutral—that is, have a total charge of zero? Explain.

A total of 600 C of charge passes through a flashlight in 0.500 h. What is the average current?

The current through a 12-gauge wire is given as I(t)=(5.00A)sin(260Hzt)). What is the current density at time 15.00 ms?

What is the current in milliamperes produced by the solar cells of a pocket calculator through which 4.00 C of charge passes in 4.00 h?

Check Your Understanding Handheld calculators often use small solar cells to supply the energy required to complete the calculations needed to complete your next physics exam. The current needed to run your calculator can be as small as 0.30 mA. How long would it take for 1.00 C of charge to flow from the solar cells? Can solar cells be used, instead of batteries, to stall traditional internal combustion engines presently used in most cars and trucks?

When the potential difference across a certain conductor is doubled, the current is observed to increase by a factor of 3. What can you conclude about the conductor?

The current of an electron beam has a measured current of I=50.00A with a radius of 1,00 mm2. What is the magnitude of the current density of the beam?