FreeNotes
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
The capacitance of a capacitor, according to the equation C=Q/V, where C is the capacitance, Q is the charge stored on one of its plates, and V is the potential difference between the plates, does not depend on the amount of charge Q or the potential difference V. Instead, capacitance is a property of the capacitor … Read more
It’s dangerous for construction workers to hold a long steel pole upright during lightning because steel is an excellent conductor of electricity. If lightning strikes, the metal pole would act as a direct path for the electrical current to travel through the worker’s body. This could result in severe injuries or death due to electrical … Read more
The force between two point charges is given by Coulomb’s Law: F=k.q1q2/r2 where: F is the force between the charges, k is Coulomb’s constant, q1 and q2 are the magnitudes of the charges, and r is the distance between them. Now, in this case, both charges are doubled (q1′=2q1 and q2′=2q2), and the distance between them is halved … Read more
According to Newton’s Third Law of Motion, every action has an equal and opposite reaction. This means that the force the smaller charged body applies on the 20 kg charged body will be the same as the force the 20 kg charged body applies on the smaller body, but in the opposite direction. So, even … Read more