Question

1. Answer the following questions please, clear handwriting

A. Two point charges, +8x10-9 C and −2x10-9 C, are separated by 4 m. The electric field magnitude midway between them is about:

B. A current of 1.2 A is passed through a lamp for 0.5 minutes using a 32-V power supply. The energy dissipated by the lamp during the 0.5 minutes is:

C. You have five homogeneous wires made of the same material. Each wire has a diameter of 5 mm and a length of 1.2 m. When the five wires are connected in series, their combination has an equivalent resistance of Req. You want to obtain this same equivalent resistance with a single wire made of the same material, but whose diameter is 1 mm. About how long should this single wire be?

D. If you wish to increase the power produced in a heating device four times, you could:

E. Three coulombs of charge that pass through a 9-volt battery are given an energy of about:

A 12-W lamp and a 6-W lamp are each plugged into identical electric outlets. The electrical current through the 12-W lamp is about:

Answer 1