Download QUESTIONS lesson 3 - JUANA

ELECTRICAL MAGNITUDES
QUESTIONS
1.
Does electrical resistance make it easier or more difficult for
current to pass through a circuit? What unit is used to measure
resistance? What is its abbreviation?
The resistance make it more difficult for current to pass through a
circuit.
The unit is Ohm, the abreviation is Ω
2.
What do we call the instrument used to measure resistance?
Draw its symbol.
Multimeter or Ohmeter
Ω
Ω
3.
Ω
To measure
the resistance of a flashlight, should it be turned
on? Why or why not?
NO.
If voltage is being supplies it will distort the measurement and could
also damage the multimeter
Imagine that you are measuring the resistance of a carbon
resistor. The selector is set to the position 2K and the display is
showing 33.6. What is the resistance value?
33.6 KΩ
4.
5.
What is electrical voltage? What unit is used to measure it?
What is its abbreviation?
Voltage is the energy that a generator uses to propel the electrons
flowing in an electrical circuit
The unit is volts , and the abreviation is V.
6.
What do we call the instrument used to measure voltage?
Draw its symbol.
The voltmeter or multimeter
V V
7.
What does it mean if the voltage of a battery is being
measured and the display shows 0 V? And what if it displays a
lower-case L?
It means that you have selected is too high. You need to turn the
selector to the next lower scale.
The letter L means that the voltage is too high for the scale so you
need to change the selector to a higer position
8.
What is an electric current? What are the names of the two
types that exist, and how are they different?
The electric current is the flow of electrons
There are two types of currents: direct current (DC) and alternating
current (AC).
The direct current where the movement of the electrons is always in
the same direction, and alternating current, where the direction of the
movement of the electrons changes.
9.
What does the amperage of an electric current tell us? What
unit is used to measure it? What is its abbreviation?
The amperage is the amount of electric charge that passes through
a cross section of a conductor each second.
The unit is ampere and the abreviation is A
10.
What do we call the instrument used to measure amperage?
How is it connected? Draw its symbol.
Ammeter or multimeter
A A
11.
When measuring the amperage in a circuit made up of a
flashlight bulb connected to a battery, the selector is in the
position 200m and the display shows 26.3. What is the amperage
value?
26.3 mA