Content Outline

Massachusetts Science Framework Standard/s

Concepts Objective

Associated Mathematics Skills

Prerequisite skills

IX. Electricity

    A. Electric Charge and Static Electricity1. Electric Charge

      2. Electric Forces

      3. Electric Fields

      4. Static Electricity

    B. Electric Current

      1. DC

      2. AC

   C. Conductors, Insulators, and

        Resistance

   D. Voltage

      1. Potential Difference

      2. Voltage Sources

   E. Ohm’s Law

      1. Calculations with Ohm’s Law

         a Formula

         b.Units

   F. Circuits

     1. Parts of a Circuit

       a. symbols

     2. Series Circuit

     3. Parallel Circuits

     4. Power and Energy

       a. Calculations

       b. Formula

       c. UnitG. Electrical Safety

      1. Home

      2. Personal

5.1 Recognize the characteristics of static charge, and explain how a static charge is generated.

5.2 Interpret and apply Coulomb’s law.

5.3 Explain the difference in concept between electric forces and electric fields.

5.4 Develop a qualitative and quantitative understanding of current, voltage, resistance and the connection between them.

5.5 Identify appropriate units of measurement for current, voltage, and resistance, and explain how they are measured.

5.6 Analyze circuits (find the current at any point and the potential difference between any two points in the circuit) using Kirchoff’s and Ohm’s      laws.

· Describe how an electric charge is produced.

· Define electric force and how it relates to the law of attraction and repulsion.

· Analyze factors that affect the strength of an electric field.

· Describe how a charge can be transferred by friction, by contact, and by induction.

· Explain why static discharge occurs.

· Define electric current and describe the two types of current. 

· Describe conduction and classify materials as conductors or insulators.

· Describe factors that affect resistance.

· Explain how voltage produces electric current.

· Calculate voltage, current, and resistance using Ohm’s Law.

· Use symbols to draw circuit diagrams of series circuits and parallel circuits.

· Compare series circuits and parallel circuits.

· Calculate electric power and electrical energy.

· Explain how fuses and circuit breakers function.

· What is a short circuit?

· List safe usage rules to follow at home

· Be able to solve for the variables and supply appropriate units in each of the following formulae

· I = V / R

Where:

  I = current

  V = voltage

  R = resistance

· R_T = R₁ + R₂ +…+R_n

· 1/R_T = 1/R₁ +1/ R₂ +…+1/R_n

· W = ΔVq

Where:

  W = work

  ΔVq

  q = charge

· P = ΔVI

Where :

P =  power

ΔV = voltage

I = current

F= kq₁q₂/d²

    Where

    F = force

    k = Proportionality constant

    q₁ = Charge of one particle

    q₂ = Charge of one particle

    d= distance between particles