A multimeter is a portable instrument used to directly measure electrical quantities like current, voltage, and resistance. It can measure both direct and alternating current over various ranges. Multimeters contain either analog or digital displays and use a sensitive galvanometer and specific electrical circuits to measure different electrical values. They are very versatile tools that are important for measuring electrical quantities in circuits, determining characteristics like resistance, capacitance and inductance, and identifying causes of faults in electrical appliances.

1. Multimeter
Nellys Mata
C.I 26087100
Instituto Universitario
Politécnico Santiago Mariño
Extensión Porlamar

3. WHAT IS A MULTIMETER
A multimeter , also called tester or
tester is a portable instrument to
directly measure active electrical
quantities as current and potential
( voltage ) or passive as resistors, and
other capabilities .
The measurements can be made for
direct or alternating current and various
measuring ranges each. Then there are
analog and digital have been
introduced whose function is the same
( with some added variant)

4. Functions
It is a very versatile device , which is based on the use of a
measuring instrument , a sensitive galvanometer is used for all
determinations . To measure each of the electrical quantities , the
galvanometer must be completed with a specific electrical circuit
will also depend on two characteristics of the galvanometer : the
internal resistance ( Ri ) and the inverse of the sensitivity . The
latter is the intensity , applied directly to the terminals of the
galvanometer , it causes the needle reaches the full scale.
When measured in direct current , usually red the greatest
potential (or potential + ) and black color, the lower potential (or
potential -) .

5. THANKS

6. iMPORTANCE
The significance is incalculable, because by using the
measured and indicated electrical quantities such as
current, charge, potential energy, or the electrical
characteristics of the circuits , such as resistance,
capacitance , inductance and capacitance . Also for
recognizing the cause of faulty operation in which
electrical appliances , as is well known , it is not possible
to see its operation in a visual form , as in the case of a
mechanical device