Nmat Part 1&2 Practice Set Flashcards
Instrument used for detecting electric current
Galvanometer
Device that converts mechanical energy to electrical energy
Generator
static electrical device that transfers energy by inductive coupling between
its winding circuits.
Transformer
electrical device that converts alternating current (reverses direction) to direct
current which flows in only one direction.
Rectifier
FACTS
Bernoulli`s principle: A1V1=A2V2
a. If the diagram shows that the next part branches, to find either variable (A2 or V2) just
make both sides equal.
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Acceleration is the rate of change of an object`s velocity (a= v/t)
a. In a graph that has a slope equal at each point there is no acceleration because the
velocity is constant.
direction transfer of energy via molecular collisions
Conduction
transfer of heat by physical motion of the heated material (only liquids and
gases)
Convection
transfer of energy by electromagnetic waves
Radiation
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When a glass flask is filled with water then heated, then taken off the heat and tightly stoppered immediately, then has cold water poured over the flask it will result in boiling again since the condensation of the steam reduces the pressure inside.
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Immediate source of water which forms dew on grass on a summer morning is the air
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the higher the number of specific heat the greater amount of heat it needs to raise the temperature of its unit mass by one degree.
Know units for
a. Density =
b. Specific heat capacity=
c. Thermal conductivity=
d. Specific latent heat =
Know units for
a. Density = mass/volume
b. Specific heat capacity= J/gCo = 1 cal/gK
c. Thermal conductivity= Watts/mK
d. Specific latent heat = Joule/kg
In hydroelectric plants, electric energy is generated by
Making use of the power of a waterfall
