955 test Comprehensive Questions
(Frequently Tested) with Verified
Answers Graded A+
State Ohm's law - Answer: V=IXR
R=V/I
I=V/R
If current goes down, what does resistance do? - Answer: Reistance goes up
If Voltage is CONSTANT and Resistance goes DOWN, what must Current do? - Answer: Current
HAS to go UP!
What is the definition of a short circuit? - Answer: Zero resistance. Circuit has high current, and
zero resistance.
What would cause Current to DECREASE in a circuit, IF Voltage remained CONSTANT? - Answer:
INCREASSE in Resistance
What is a Transformer? - Answer: An electrical device that transfers energy from one electrical
circuit to another by magnetic coupling, aka: Mutal Induction. One set of windings induce a
voltage in the other set of windings.
What are Transformers used for? - Answer: Used to convert between high and low voltages and
for impedance transformation.
State the Power formula. - Answer: P = V X I
power equals voltage times current
, What are air core transformers main use? - Answer: Radio frequency circuits ABOVE 20kHz
What are iron core transformers main use? - Answer: Lower frequency: below 20kHz
To transmit electrical power what must a transformer have? - Answer: Has a very high current
OR very high voltage. High current means a high flow rate of electrons. This requires a VERY
large COPPER or ALUMINUM cable.
*How does a Power Station function? - Answer: Uses high voltage to reduce the amount and
weight and therefore
What is the symbol for a transformer? - Answer: XX
What kind of electrical charge does a neutron have? - Answer: Neutral
What kind of electrical charge does a proton have? - Answer: Positive
The step down transformer outside a house does what? - Answer: Reduces the voltage to a
usable voltage for the house ELECTRIC, which are usually TWO 120VAC legs.
What is an electronic shunt? - Answer: A device which allows electric current to pass around a
point in a circuit. A shunt as CIRCUIT PROTECTION: is a device that is commonly called a
CROWBAR circuit and is used when a circuit must be protected from over VOLTAGE.
What does a capacitor do? - Answer: When used as a shunt, redirects hight frequency nouse to
ground before it can transmit to the load or other circuit components. This is why they are used
so frequently in DC power supplies as AC filters.
(Frequently Tested) with Verified
Answers Graded A+
State Ohm's law - Answer: V=IXR
R=V/I
I=V/R
If current goes down, what does resistance do? - Answer: Reistance goes up
If Voltage is CONSTANT and Resistance goes DOWN, what must Current do? - Answer: Current
HAS to go UP!
What is the definition of a short circuit? - Answer: Zero resistance. Circuit has high current, and
zero resistance.
What would cause Current to DECREASE in a circuit, IF Voltage remained CONSTANT? - Answer:
INCREASSE in Resistance
What is a Transformer? - Answer: An electrical device that transfers energy from one electrical
circuit to another by magnetic coupling, aka: Mutal Induction. One set of windings induce a
voltage in the other set of windings.
What are Transformers used for? - Answer: Used to convert between high and low voltages and
for impedance transformation.
State the Power formula. - Answer: P = V X I
power equals voltage times current
, What are air core transformers main use? - Answer: Radio frequency circuits ABOVE 20kHz
What are iron core transformers main use? - Answer: Lower frequency: below 20kHz
To transmit electrical power what must a transformer have? - Answer: Has a very high current
OR very high voltage. High current means a high flow rate of electrons. This requires a VERY
large COPPER or ALUMINUM cable.
*How does a Power Station function? - Answer: Uses high voltage to reduce the amount and
weight and therefore
What is the symbol for a transformer? - Answer: XX
What kind of electrical charge does a neutron have? - Answer: Neutral
What kind of electrical charge does a proton have? - Answer: Positive
The step down transformer outside a house does what? - Answer: Reduces the voltage to a
usable voltage for the house ELECTRIC, which are usually TWO 120VAC legs.
What is an electronic shunt? - Answer: A device which allows electric current to pass around a
point in a circuit. A shunt as CIRCUIT PROTECTION: is a device that is commonly called a
CROWBAR circuit and is used when a circuit must be protected from over VOLTAGE.
What does a capacitor do? - Answer: When used as a shunt, redirects hight frequency nouse to
ground before it can transmit to the load or other circuit components. This is why they are used
so frequently in DC power supplies as AC filters.
