Question

1. State Coulomb's law.

2. Two equal balls having equal positive charge Q coulomb are suspended by two insulating strings of equal length what would be the effect of the force when a plastic sheet is inserted between the two?

3. State the junction rule.

4. what is the Toroid?​

Answer 1

1. According to Coulomb's law, the force of attraction or repulsion between two charged bodies is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. It acts along the line joining the two charges considered to be point charges.
2. Force will decrease. The force between charged balls will decrease.
3. Kirchhoff's Junction Rule
4. It is an application of the principle of conservation of electric charge. The law states that at any circuit junction, the sum of the currents flowing into and out of that junction are equal.
5. In mathematics, a toroid is a surface of revolution with a hole in the middle. The axis of revolution passes through the hole and so does not intersect the surface. For example, when a rectangle is rotated around an axis parallel to one of its edges, then a hollow rectangle-section ring is produced.

Answer 2

1. Coulomb's Law

Coulomb's law states that the force of a charged object on another charged object is directly proportional to the product of their charge(s) and inversely proportional to the square of the distance between them.

`F_(elec)=k(|q_1||q2|)/(r^2)`

k is a constant.

2. The Force Would Decrease.

Coulomb's law predicts the electric force between two charged objects in a medium.

`F=(1)/(4\pi\in_0 ) (|q_1q_2|)/(r^2)`

where K is the medium's dielectric constant.

Vacuum:
`k=1`

Plastic:
`k > 1`

Therefore, the force between the two balls will decrease when the plastic sheet is inserted.

3. The Junction Rule states that the sum of magnitudes of the currents directed into a junction equals the sum of the magnitudes of the currents directed out of the current.

4. A Toroid is a doughnut shaped object whose surface is a torus. It annular shape is generated by revolving a circle around an axis external to the circle. Some example uses are RF chokes which is an inductor to have a high impedance to RF current and low impedance to DC current. Another use is variable-frequency oscillator (VFO). The frequency is set by a tuned circuit using capacitors and inductors. The frequency can be changed by adjusting the components in the tuned circuit. Just one last example is in mixers. These are used in transformers for Diode Ring Mixers. Which result in being ready, built, and homebrew.