Explanation

Ohm's law is not applicable to Semiconductors, as the relationship between voltage and current does not remain constant in these devices.

Semiconductors have a non-linear current-voltage characteristic, making Ohm's law inapplicable.

Explanation

Ohm's Law is valid only if the temperature of the conductor remains constant.

If the temperature changes, the resistance of the conductor may change, and Ohm's Law may not hold.

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

Resistivity is a property of the material itself, and is not a factor that affects the resistance of a specific conductor.

The resistance of a conductor depends on its length, cross-sectional area, and the material's resistivity.

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.