FreeNotes
Construction of a Parallel Plate Capacitor: A parallel plate capacitor consists of two flat, conducting plates that are placed parallel to each other and separated by a small distance. Here’s the construction in more detail: Plates: The two plates are made of conductive materials such as metal, and they are usually identical in shape and … Read more
Electrostatic induction is the process of charging a conductor without direct contact. Example: If a positively charged rod is brought near a neutral metal sphere, negative charges in the sphere move toward the rod, and positive charges move away. If the sphere is then grounded, positive charges escape, leaving the sphere negatively charged. When the … Read more
Coulomb’s Law describes the electrostatic force between two point charges. It states that the force between two charges is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them. This force is attractive if the charges are of opposite sign and repulsive if … Read more
The capacitance of a parallel plate capacitor is given by the formula: C=ε0A/d Where: C is the capacitance. ε0 is the permittivity of free space (a constant). A is the area of the plates. d is the distance between the plates. From this formula, you can see that the capacitance is inversely proportional to the distance between the plates … Read more
A pointed tip helps in the easy discharge of electric charge into the air due to the concentration of charge at the sharp end. This prevents the buildup of large charges, reducing the chances of a lightning strike on the building. Related Questions: Rub a plastic ruler with your hair. Place it near running water … Read more
The force between two charges is governed by Coulomb’s law, which states that the force (F) between two charges is directly proportional to the product of the magnitudes of the charges (q1 and q2) and inversely proportional to the square of the distance (r) between them: F=k.q1q2r/2 Where: k is Coulomb’s constant. r is the distance between … Read more
Walking on a carpet causes friction, which transfers electrons to or from the body, creating static charge buildup. When the person touches a metal object (a conductor), the charge quickly discharges, causing a small electric shock. Related Questions: Rub a plastic ruler with your hair. Place it near running water from a tap. You see … Read more
When a charged balloon is brought near a neutral wall, it induces an opposite charge on the surface of the wall. Since opposite charges attract, the balloon sticks to the wall due to electrostatic attraction. Related Questions: Rub a plastic ruler with your hair. Place it near running water from a tap. You see that … Read more
To decrease the capacitance of a device from 250nF to 50nF, you can achieve this by connecting another capacitor in series with the existing one. Reasoning: When capacitors are connected in series, the total capacitance Ctotal is given by: 1/Ctotal=1/C1+1/C2 Where C1 is the capacitance of the original device (250nF), and C2 is the capacitance of … Read more
When two capacitors with different plate areas are connected to the same battery, they will gain different amounts of charge. The reason lies in the relationship between the capacitance of a capacitor, the charge it stores, and the voltage applied to it. The capacitance C of a parallel plate capacitor is given by the formula: … Read more