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PhysicsALT103
ALT 103
| Question | Answer |
|---|---|
| The SI unit of charge is what? | Coulomb |
| Coulomb's Law describes what? | The attractive and repulsive forces between two charged particle. It depends on the charges of the particles and the distance between them. |
| 1 electron and 1 proton have the same charge. What is that fundamental/elementary charge of 1 electron and proton? | e = -1.60 x 10^-19 C p = 1.60 x 10^-19 C |
| When does an object carry a charge? | When the amount of positively or negatively charged particles out number the amount of the other particle. (Gaining or losing electrons) |
| What is the mass of an electron? | 9.11 x 10-31 kg |
| Describe the relationship between electrons and their nucleus inside of insulators and conductors. | Insulators: Electrons are tightly bonded to the nucleus Conductors: Electrons are NOT tightly bound to the nucleus (float around in outer cloud) |
| What are two most common sources of emf? (Electromotive force) | Generators (mechanical energy>kinetic energy>EMF Batteries > chemical energy > EMF |
| As temperature increases, how does resistance react? | When temperature rises, resistance rises. It is ideal to keep wires cold to eliminate resistance but keeping wires very cold is impractical. |
| Conventional current always flows from where? Electrons flow from where? | Conventional current flows out of the positive terminal of the emf, and electrons flow out of the negative terminal of the emf |
| In a series circuit, if one light bulb is burnt out how do the others react? | They all burn out because the electricity is connected in a straight line |
| Describe measuring voltage, current and resistance in a SERIES circuit. | Voltage= V1 + V2 + V3 Current = I1 = I2 = I3 Resistance = R1 + R2 + R3 |
| Describe measuring voltage, current and resistance in a PARALLEL circuit. | Voltage = V1 = V2 = V3 Current = I1 + I2 + I3 Resistance = (1/R1)^-1 + (1/R2)^-1 + (1/R3)^-1 |
| Snell's Law | a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves |
| Step Up Transformers, Step Down Transformers | Step Up transformers = voltage ^, current down Step Down transformers = current ^, voltage down |
| Newton's 1st Law | First law: The velocity of a body remains constant unless the body is acted upon by an external force |
| Newtons 2nd Law | The acceleration a of a body is parallel and directly proportional to the net force F and inversely proportional to the mass m, i.e., F = ma. |
| Newtons 3rd Law | The mutual forces of action and reaction between two bodies are equal, opposite and collinear. |
| Dielectric Breakdown | Maximum potential difference a dielectric can withstand (breakdown meaning becomes a conductor) |
| Charge in series circuits with CAPACITORS | Qtotal=Q1=Q2=Q3(INDUCTION MAKES ALL THE CHARGES THE SAME IN EACH CAPACITOR) |
| MAGNETIC FIELD LINES | Out of north, into south. Higher density, higher strength, direction tangential to line and towards the south. Lines always close. |
| 3 Types of magnetic materials | Ferromagnetic(Ironlike), Paramagnetic(interact little with b-fields), diamagnetic(repel magnetic fields) |
| Magnetic fields are created by moving charges, in iron,nickel,cobalt, it is the circulation electrons thatare responsible for magnetic fields | TRUE! |
| RHR #1 | Point thumb in the direction of the conventional current in the wire. Your extended fingers will curl them in the direction of the magnetic field |
Created by:
calv18
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