Determine the resistance
of the field winding of a circulation pump if it consumes a current of 0,5A
with a voltage of 230V.
A heating rod takes
consumes a current of 6,1A with a voltage of 400V. Calculate the resistance
of the heating rod.
The electric current
that is flowing through the coil of an ignition transformer has to be determined.
Its resistance is 2,5k,
the applied voltage is 230V.
Determine the exact
electrical voltage that is applied to an "NTC feeler" under the following
conditions:
a) 25°C, 0,930k
b) 32°C, 780
The signal current is constant in both cases with 1,5mA.
Determine the conductor
resistance of a 20m long copper cable with a cross section of 0,04cm2, the
temperature is 20°C.
Determine how long an
aluminium cable can maximally be if its cross section is 0,025cm2 and its
conductor resistance should maximally be 0,0028k
at a temperature of 20°C.
The electrical arc welding
resistance is 1/3.
Determine the amperage if the voltage is 25V.
A coil through which
direct current is flowing consists of 100m of copper wire whose cross section
is 0,036mm2. Calculate the necessary size of the dropping/in series connected
resistor if the total resistance should be 100.
The resistivity of a
part made of an unknown material has to be determined. The length of the part
is 2cm, its cross section is 4mm2 and a resistance of 10
had been determined in a measurement.