1.1 application questions

• Common characteristics of magnetic, electric and gravitational fields

  1. a source object can exert a force on a test object without any physical contact
  2. The field can be described in terms of field lines
  3. the fields are invisible
• differing characteristics of magnetic, electric and gravitational fields

  1. The sources and test objects for each field differ
  2. The field lines for each type of field form different types of patterns
• Electric field lines can point toward or away from a source, depending upon the nature of the source charge.
• Magnetic field lines form loops that are directed from the north pole to the south pole.
• Gravitational field lines always point toward the source