Question

1. A uniform electric field of magnitude 364 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 2.80 cm. (a) What is the work done by the field on the electron? J (b) What is the change in potential energy associated with the electron? J (c) What is the velocity of the electron? magnitude m/s direction

2. Calculate the speed (in m/s) of an electron and a proton with a kinetic energy of 1.70 electron volt (eV). (The electron and proton masses are

m_e = 9.11 ✕ 10⁻³¹ kg

and

m_p = 1.67 ✕ 10⁻²⁷ kg.

Boltzmann's constant is

k_B = 1.38 ✕ 10⁻²³ J/K.)

(a) an electron _____ m/s

(b)a proton ____ m/s

(c) Calculate the average translational kinetic energy in eV of a 3.43 ✕ 10² K ideal gas particle. (Recall from Topic 10 that 1/2 mv² = 3/2k_BT) _____ eV

3. A 20.0-V battery is connected to a 4.60-μF capacitor. How much energy is stored in the capacitor?
___ J

Thanks in advance

Answer 1

1) work done = qEd

1.6 X lo 16.31 X10- 1丁 1631XI e lechrom -19 V2 x 16.31 X 12