IQ: How do charged objects interact with other charged objects and with neutral
- Electrostatic force
- Process of how objects become electrically charged
- Interactions between charged particles
- Electric field lines
- simple point charges
- pairs of charges
- parallel charged plates
- 𝐹 = 𝑞𝐸 and 𝐸 =𝑉𝑑 and 𝐹 =(1/4𝜋𝜀)*(𝑞1𝑞2/𝑟^2)
Diagrammatically, compare and contrast the interaction between two positive point charges, two negative point charges and a positive and negative point charge. [3 marks]
A student rubs a balloon against their head and notices the balloon sticks to their head, explain this phenomena. [3 marks]
Draw the path of an electron passing between a pair of charged plates, arrange the plates so the field lines are parallel to the horizon. [2 marks]
- a) A charged plate has a 4 V potential difference with a spacing of 15 cm, if an electron is released midway between the plates, what is the maximum acceleration of the electron. [4 marks]
- b) What is it’s maximum velocity [2 marks]
- c) How would this differ if the electron was replaced by a proton. [4 marks]
A helium nucleus, consisting of two protons and two neutrons, is 5 cm from a proton.
- a) Will this experience an attractive force or a repulsive force [1 mark]
- b) What will be the magnitude of this force? [2 marks]
- include diagram of like charges as well.
- a) 4.7 * 1012 m/s/s towards positive
- b) 8 * 106 m/s towards positive
- c) Repeat calculations accounting for different mass and charge.
1.84 * 10^-29 N repulsion