Question

1. A charge of 27.0 nC is placed in a uniform electric field that is directed vertically upward and that has a magnitude of 4.00×10⁴ N/C . What work is done by the electric force when the charge moves...

a. 0.500 m to the right

b. 0.640 m upward;

c. 2.20 m at an angle of 45.0 downward from the horizontal?

2. A potential difference of 5.00 kV is established between parallel plates in air. If the air becomes ionized (and hence electrically conducting) when the electric field exceeds 3.05×10⁶ V/m , what is the minimum separation the plates can have without ionizing the air?

3. An electron is to be accelerated from a velocity of 3.50×10⁶ m/s to a velocity of 8.00×10⁶ m/s . Through what potential difference must the electron pass to accomplish this?Through what potential difference must the electron pass if it is to be slowed from 8.00×10⁶ m/s to a halt?

Answer 1