WorksheetsBasic Electricity (MCHE)
Total questions: 54
Worksheet time: 29mins
Name given to electric charges and the effects they cause?
Electricity
Electronegativity
Conduction
Insulation
TRUE OR FALSE:
Electricity is a type of magnetic force?
True
False
What are the three types of Electricity
AC
DC
Static Electricity
Triboelectricity
Magnetism
What is AC (alternating current)?
when current flows in one direction
when current changes 120 times per second
when charges will go from high to low concentration ONCE
charging things by rubbing
What is DC (direct current)?
when current flows in one direction
when current changes 120 times per second
when charges will go from high to low concentration ONCE
charging things by rubbing
What is Static Electricity?
when current flows in one direction
when current changes 120 times per second
when charges will go from high to low concentration ONCE
charging things by rubbing
What is Triboelectricity?
when current flows in one direction
when current changes 120 times per second
when charges will go from high to low concentration ONCE
charging things by rubbing
DC is direct current as from a ________
charge
ion
electron
battery
TRUE OR FALSE:
Static Electricity is also electricity at rest. The charges collected and held in one place
TRUE
FALSE
How does work function with Triboelectricity?
work is done to remove ions
no work is done
work is done to remove electrons
work is done to add electrons
If work is stored as PE and/or KE, can the charge now do work?
Maybe
Yes
No
In some cases
What is an example of triboelectricity?
running from one side to another
jumping up and down
moving a box vertically up
rubbing a balloon on your hair and sticking it to a wall
Coulombs Law:
Found that electric force does not vary
Found that charges vary directly proportional with square distance apart
Found that electric force varies inversely with square of distance apart
Found that charges do not vary
True or False:
Is this the formula for Coulomb's Law?
Fe=kqq'/d^2
True
False
What is the unit of charge? (Coulomb)
I
C
A
M
What is the symbol of charge (Coulomb)?
a
b
q
c
Charge on electron, called elementary unit of charge =
2.0 x10^4
6.5 x 10^3
6.25 x 10^18
1.60 x 10^19
1 C is the charge on how many electrons
6.25 x 10^18
1.60 x 10^-19
2.5 x 10^20
8.9 x 10^5
K is a constant. What is the number?
6.25 x 10^18
9.0 x 10^9
2.5 x 10^16
3.0
True or False:
All natural systems like to have high energy (be unstable)
True
False
A volt is...
J/C
C/J
A volt is also
charge/change in PE
change in PE/charge
The difference in potential energy is called
Electricity
Heat
Mechanical Energy
Voltage
True or False:
Charges flow until all parts of a conducting body are equal
True
False
All of the charges are on which part of a solid body with the field strongest near a sharp point on an object?
the ions
the electrons
the energy
the surface
What is the flow of electrons from high potential to low potential
transfer of energy
current
power
charge
The flow of currents stop when potential is
similar
equal
different
opposite
Several devices are used to convert energy to electrical potential energy. Which ones are they?
pump
voltaic cell
battery
generator
photovoltaic cell
What is a battery
chemical to electrical
connected to a voltaic cell
light into electrical
kinetic energy into electrical
What is a generator
chemical to electrical
connected to a voltaic cell
light into electrical
kinetic energy into electrical
What is a photovoltaic cell
chemical to electrical
connected to a voltaic cell
light into electrical
kinetic energy into electrical
What is a voltaic cell
chemical to electrical
connected to a voltaic cell
light into electrical
kinetic energy into electrical
Electrons flow around a closed loop called a _______
pipe
current
circuit
wire
Current (I) is:
Coulombs/second
second/Coulombs
C/s
s/c
Amps (A)
Current is measured with
an ammeter
measuring tape
ruler
calculator
Conventional Current is the flow of
positive charge
negative charge
Electron flow is of
Positive charge
Negative charge
Power (P) =
I/V
V/I
WV
IV
Unit of power is
Megawatts (MW)
Watts (W)
Kilowatts (kW)
Milliwatts (mW)
What is any device that lowers the potential difference
Restriction
Resistance
Current
Power
Resistance (R) is measured in
Watts
Ohms
Omegas
Joules
True or False:
Resistors or insulators are conducting things?
True
False
What happens when you get too much resistance
You get friction
Nothing
Energy is gained
You get Heat
According to Ohm's Law, resistance is not related to the size or direction of potential difference, but to the ________ itself.
charge
weight
resistor
electricity
Ohms' Law
I= V/R
I= VR
I= V^2R
I= R/V
What are the three Power Formulas
P= IV
P= V^2/R
P= I^2/R
P= I/R
P=R/V
Energy =
Pt
p/t
t/p
1/2 (pt)
Resistance will determine
how much ions will flow
how much electrons will flow
how much electricity will flow
how much current will flow
Resistance depends on
Power
(Power in watts)
Material Itself
(resistivity factor, rho)
Length
(prop. to resistance)
Area
(inversely prop. to resistance)
Charge
(In amps)
What is the formula for Resistivity (r)
R=l/a
R= rho(L)/A
R=L/A
R= rho (L)/piR^2
Resistance increases with
size
mass
temp
resistivity factor
True or False:
When temp goes up, resistance goes up and when temp goes down, resistance will go down.
True
False
In gauges, is size related to resistance
yes
no
True or false:
The higher the gauge, the more resistance because it is small
True
False
