Static Electricity and Electrostatics

A conductor allows the flow of electric charge through the circuit.

Plastic and glass.

Aluminium is cheaper and lighter than copper.

<p>Pure water becomes a good conductor when salt is added.</p> Signup and view all the answers

<p>A power source, connecting wires, and a load.</p> Signup and view all the answers

<p>An open circuit is incomplete and prevents current from flowing.</p> Signup and view all the answers

<p>Electric circuits are represented using symbols for each component.</p> Signup and view all the answers

<p>Electricity is produced when negative electrons and positive protons are separated.</p> Signup and view all the answers

<p>Voltage is the same across all components in a parallel circuit.</p> Signup and view all the answers

<p>Resistance is opposition to the flow of current, crucial for controlling the current through electrical components.</p> Signup and view all the answers

<p>Resistors use four color bands that indicate their resistance value and tolerance.</p> Signup and view all the answers

<p>A gold tolerance band indicates a 5% accuracy for that resistor.</p> Signup and view all the answers

<p>The resistance value is 6200 ohms or 6.2 kilo-ohms.</p> Signup and view all the answers

<p>Electrical current is the flow of charge, typically due to electrons moving in a circuit.</p> Signup and view all the answers

<p>Ohm's Law states that current equals voltage divided by resistance: $I = \frac{V}{R}$.</p> Signup and view all the answers

<p>Conventional current is represented as flowing from positive to negative terminals, despite electrons actually moving in the opposite direction.</p> Signup and view all the answers

<p>Connecting wires typically have very low resistance, making them negligible in calculations.</p> Signup and view all the answers

<p>To convert 100mA to amps, you multiply by $10^{-3}$, resulting in 0.1A.</p> Signup and view all the answers

<p>Resistance measured in ohms quantifies how much current will flow in response to a given voltage.</p> Signup and view all the answers

<p>Voltage provides the energy needed to push electrons through the circuit, functioning like a force.</p> Signup and view all the answers

<p>A voltmeter should be placed in parallel across the component to measure the voltage.</p> Signup and view all the answers

<p>In a series circuit, the total voltage is shared among all components.</p> Signup and view all the answers

<p>The standard unit of current is the ampere, abbreviated as A.</p> Signup and view all the answers

<p>Components such as light globes and motors utilize electrical energy transferred from electrons as they flow from the negative to the positive terminal.</p> Signup and view all the answers

<p>The VIR triangle represents the relationship between Voltage (V), Current (I), and Resistance (R) in electrical circuits.</p> Signup and view all the answers

<p>In a series circuit, the current is the same through all components, while in a parallel circuit, the current is split among the branches.</p> Signup and view all the answers

<p>V = 9V</p> Signup and view all the answers

<p>The relationship is given by the formula P = VI.</p> Signup and view all the answers

<p>A break in a series circuit interrupts the current flow, affecting all components connected in the circuit.</p> Signup and view all the answers

<p>An ammeter measures the current passing through a specific point in an electric circuit.</p> Signup and view all the answers

<p>The unit of measurement for Power is Watts (W).</p> Signup and view all the answers

<p>I = 2A</p> Signup and view all the answers

<p>Current is the flow of electrons through a circuit, measured in amperes, representing charge flow per second.</p> Signup and view all the answers

<p>Electron flow moves from the negative terminal to the positive terminal, whereas conventional current is defined as positive charge flow from positive to negative.</p> Signup and view all the answers

<p>Resistance is anything in a circuit that slows the flow of electrons.</p> Signup and view all the answers

<p>The formula is R = V/I. For example, if V = 12V and I = 0.004A, then R = 3000Ω.</p> Signup and view all the answers

<p>The total current from a battery in a parallel circuit is the sum of the currents through each branch.</p> Signup and view all the answers

<p>Energy-efficient devices use less power (measured in Watts) for the same task or output.</p> Signup and view all the answers

<p>If one bulb in a parallel circuit goes out, the other bulbs remain unaffected and continue to operate.</p> Signup and view all the answers

<p>In a series circuit with an ammeter, the current is measured the same at all points in the circuit.</p> Signup and view all the answers

<p>It becomes positively charged.</p> Signup and view all the answers

<p>Opposite charges attract due to the balance of positive and negative forces, while like charges repel each other because of similar forces acting in the same direction.</p> Signup and view all the answers

<p>It generates a high voltage that demonstrates the effects of static charge by allowing electrons to move and create attraction or repulsion.</p> Signup and view all the answers

<p>Static electricity builds up as particles in the cloud rub against each other, creating a separation of charges which can discharge as lightning.</p> Signup and view all the answers

<p>They will repel each other.</p> Signup and view all the answers

<p>Copper is a conductor and rubber is an insulator.</p> Signup and view all the answers

<p>Negative particles gather at the base of the cloud while positive particles rise to the top, creating an imbalance that leads to discharge.</p> Signup and view all the answers

<p>Metals have free electrons that allow heat and electricity to transfer easily.</p> Signup and view all the answers