Explanation

A short circuit is a condition where the resistance of a circuit is zero, or very close to zero.

This occurs when there is a direct connection between two points in a circuit, bypassing any resistance or load.

As a result, the current flows freely, and the voltage across the circuit is zero.

Explanation

Ohm's Law states that the current (I) flowing through a conductor is directly proportional to the voltage (V) applied across it, and inversely proportional to the resistance (R) of the conductor.

Mathematically, this is expressed as: I = V/R Or, V = I × R

This means that as the voltage increases, the current increases, provided the resistance remains constant.

Explanation

The resistance of a conductor does not depend on its density. 

Resistance is a property of a conductor that opposes the flow of electric current

It depends on several factors, including the length of the conductor, the cross-sectional area of the conductor, and the resistivity of the material the conductor is made of.

However, density does not affect the resistance of a conductor. 

Explanation

An ammeter is always connected in series to measure the current flowing through a particular branch of the circuit.

This allows the ammeter to measure the entire current flowing through that branch, providing an accurate reading.

Explanation

When electrons move from low to high potential, they lose energy as they move against the electric field.

This results in a decrease in their kinetic energy, making them slower.

In contrast, when they move from high to low potential, they gain energy and speed up.

Explanation

• If the area of the parallel plate capacitor is doubled, the capacitance will also double.
• The capacitance of a parallel plate capacitor is directly proportional to the area of the plates: C = ε × (A/d)
  

Explanation

The presence of a dielectric material between the plates of a capacitor increases the capacitance of the capacitor.

The dielectric material reduces the electric field between the plates, allowing more charge to be stored on the plates, and thus increasing the capacitance.

Explanation

When two capacitors of equal capacitance (C) are connected in series, the equivalent capacitance (Ceq) is half the value of one capacitor:

Ceq = (C × C) / (C + C) = (C × C) / 2C = C/2

In this case, C = 8 µF, so:

Ceq = 8 µF / 2 = 4 µF

Therefore, the equivalent capacitance of the two 8 µF capacitors connected in series is 4 µF.

Explanation

When capacitors are connected in parallel, the total capacitance (Ct) increases, as the effective plate area and charge storage capacity increase.

The formula for total capacitance in parallel is: Ct = C1 + C2 + ... + Cn

In series connection, the total capacitance decreases, as the effective plate area and charge storage capacity decrease.

The formula for total capacitance in series is: 1/Ct = 1/C1 + 1/C2 + ... + 1/Cn

Explanation

The work done on a unit charge against an electric field intensity is called electric potential.

It is also known as voltage or potential difference.

It is measured in volts (V) and represents the energy transferred per unit charge.

Electric potential (V) = Work done (W) / Charge (Q)

V = W / Q