Electron Shells and Energy

What is the maximum number of electrons that can occupy the second shell?

6
10
8 (correct)
4

Why are valence electrons relatively loosely bound to the atom?

Because they are closer to the nucleus
Because the force of attraction between the nucleus and the electron decreases with distance (correct)
Because they have higher energy levels
Because they are in the outermost shell

What is a characteristic of conductor materials?

Being poor conductors of electricity
Being good insulators
Having one to three valence electrons (correct)
Having few free electrons

What determines a material's electrical properties?

The number of electrons in the valence shell (A) Signup and view all the answers

What is the purpose of voltage in an electric circuit?

To move electrons from one point to another (C) Signup and view all the answers

Which of the following is NOT a type of material?

Convector (D) Signup and view all the answers

What is voltage analogous to in a hydraulic system?

Pressure (C) Signup and view all the answers

What is the function of a voltmeter?

To measure voltage (A) Signup and view all the answers

What is the unit of measurement for voltage?

Volts (A) Signup and view all the answers

What type of energy is used to produce voltage in a battery?

Chemical energy (C) Signup and view all the answers

What is the mathematical representation of voltage?

v = w/q (A) Signup and view all the answers

What is an ideal DC voltage source?

A source that provides a constant voltage (D) Signup and view all the answers

What is one of the principal applications of resistors?

To divide voltage (A) Signup and view all the answers

How are resistors categorized?

As fixed or variable (D) Signup and view all the answers

What is the tolerance of a resistor with a fifth band of green?

±0.5% (B) Signup and view all the answers

What is the resistance value of a resistor with a color code of red, violet, black, gold, and red?

R = 27,000 ±10% (D) Signup and view all the answers

What is the purpose of the first band on a resistor?

To indicate the first significant digit (C) Signup and view all the answers

How many bands does a Five-Band Color Code have?

5 bands (C) Signup and view all the answers

What is the primary function of strain gauges?

To sense mechanical motion (A) Signup and view all the answers

What are the three physical characteristics that affect the resistance of a wire?

Type of material, length of wire, and cross-sectional area (B) Signup and view all the answers

What is the unit of measurement for inductors?

Henry (H) (D) Signup and view all the answers

What is the symbol for an Operation Amplifier (Op-Amp)?

Op-Amp (C) Signup and view all the answers

What is the formula for the resistance of a wire?

R = ρL/A (D) Signup and view all the answers

What is the definition of an atom?

The smallest particle of an element that retains the characteristics of that element (B) Signup and view all the answers

What is the name of the particle that is the basic unit of positive electrical charge?

Proton (C) Signup and view all the answers

What happens to the electrons in the outer orbit of an atom when they break away?

They become free electrons (A) Signup and view all the answers

What is necessary for current to exist in a circuit?

Voltage must be applied to a circuit (A) Signup and view all the answers

What is the purpose of a battery in a circuit?

To convert chemical energy to electrical energy (A) Signup and view all the answers

How is an ammeter connected to a circuit to measure current?

In series with the current path (D) Signup and view all the answers