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Electrical Engineering
Current Electricity
Quiz 5
Solution
Q.1.
Electric current that flows in only one direction.
Voltage
Direct Current
Alternating Current
Series Circuit
Q.2.
A closed path that electric current follows
Voltage
Current
Resistance
Circuit
Q.3.
Kirchhoff's junction rule is a reflection of
Conservation of current density vector
Conservation of charge and no accumulation of charge at the the junction
the momentum with which a charged particle approaches a junction is unchanged as the charged particle leaves the junction
Conservation of energy
Q.4.
------ is called the increase in resistance per unit original resistance per degree kelvin rise of temperature
Thermal velocity
temperature coefficient of electrical resistivity
temperature coefficient of electrical resistance
conducance
Q.5.
A __________opens and closes a circuit?
keykey
magnet
switch
electromagnet
Q.6.
What type of cell is necessary to make solar cells practical?
primary cells
storage cells
none exist that can hold that much energy
All of above
Q.7.
What is a dry cell battery
one that uses water to make electricity
one that uses a liquid electrolyte solution
one that uses a paste electrolyte
All of above
Q.8.
What is a wet cell battery?
one that uses water to make electricity
one that uses a liquid electrolyte solution
one that uses a powdered electrolyte solution
All of above
Q.9.
What is a storage cell?
a one-use source of electrical energy
a re-chargeable source of electrical energy
a one-use source of solar electricity
Q.10.
What is a primary cell?
a one-use source for electrical charge
a re-usable source for electrical charge
a device to change sunlight into electrical charge
a one-use source for sunlight to power flashlights
Q.11.
Why are humans conductors?
Humans are made of mostly water.
Humans have a ton of metal in their bodies.
Humans conduct the railroad.
Humans are great at the electric slide.
Q.12.
What is an electric cell?
a device that converts mechanical energy into electrical energy
a device that turns stored chemical energy into electrical energy
a device that devours electrical energy
a device that converts static electricity into mechanical energy
Q.13.
Insulator or Conductor?STYROFOAM
Insulator
Conductor
Q.14.
What is the unit we use to measure electric current?
ampere (amp)
ohm
volt
newton
Q.15.
Insulator or Conductor?STEEL
Insulator
Conductor
Q.16.
How does electric current flow?
from lower charge to higher charge
from higher charge to lower charge
Q.17.
What is an electric current?
a build up of electrons
the difference in charge between 2 points
the flow of electrons over a circuit
the opposition to flow of electrons
Q.18.
What happens to the brightness of the light bulbs in a series circuit when you add more lights.
Each bulb gets dimmer
Each bulb remains the same
Half of the bulbs get dimmer
Each bulb gets brighter
Q.19.
What effect do like (similar) charges have on each other?
They attract
They repel
No effect
They reverse each other
Q.20.
True or False: Conductors allow electrons to pass through easily.
True
False
Q.21.
What kind of energy is the electricity transferred into in a toaster?
sound
light
heat
light and heat
Q.22.
What is the purpose of a switch?
To open and close the circuit.
To carry the electricity through the circuit.
To make a fun clicking sound
To supply the power to the circuit
Q.23.
What are the components of a simple circuit?
wires, switch, outlet
battery, switch, motor
wires, light bulb, motor
wires, battery, light bulb
Q.24.
What is the difference between a conductor and an insulator?
An insulator allows electricity to flow through it easily and a conductor does not
A conductor allows electricity to flow through it easily and an insulator does not.
An insulator is magnetic and a conductor is not
A conductor is magnetic and an insulator is not
Q.25.
An example of an insulator is:
iron
silver
copper wire
rubber
Q.26.
An example of a conductor is :
a glass paperweight
a plastic cap
a metal screw
a wooden handle
Q.27.
The flow of electricity in a circuit-
current
flow
circuit
Q.28.
The flow of electricity requires a
complete path
incomplete path
insulated current
All of above
Q.29.
If the lights are off, the circuit is
closed
open
Q.30.
If the lights are on, the circuit is
closed
open
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