Worksheetsfinal review part A
Total questions: 50
Worksheet time: 32mins
What is the formula for Ohm’s law?
R=IP
V=RP
V=IR
I=VP
What current flow through a 4 Ω resistor when a voltage of 12V is applied across it.
4V
3A
48V
12A
A _________circuit has 1 path for the electricity to flow.
series
closed
open
close
An electricity meter is a device that measures____
V
I
ENERGY
R
Rated voltage is voltage at which the electrical meter can operate safely.
Maximum
Minimum
Average
This is the_________formula : R=V/I
Ohm's Law
Joule's Law
Power
Electric Work
_________divided by current is resistance
Power
Voltage
Energy
Work
A parallel circuit is a closed circuit in which the current divided into__________ paths
2 or more
3 or more
4
1
____________ is the product of V & I.
Electric Power
Electric Work
R
energy
________________: The amount of energy consumed by one kilowatt load over the period of 1h
P
W
J
kWh
An electrical appliance, the resistance is 2Ω, applied voltage is 10V, what is the power?
20W
50W
200W
12W
1000W =_____
100mW
1mW
1kW
1MW
what is Joule's Law
H=IRT
W=VIT
H = I2RT
E=JIT
____________ is caused by the movement of Electrons
Lift
G
Magnetic force
resistance
__________ is caused by the movement of Charged particles
Magnetic force
Power
G
Lift
________, cobalt and nickel are called Ferromagnetic material
Iron
copper
gold
water
____________ is strongest at a magnet
Top
Bottom
Middle
poles
A freely suspended magnet always points in the _______direction
up and down
East and West
South and Nouth
Space around a magnet in which a magnetic force is exerted is_________
electric field
magnetic field
ground field
How you can make an Electricmagnet more powerful?
more current
less current
more resistance
more voltage
Magnetic field strength is __________ to the line density
nothing to do
Inverse
proportional
like poles will______
repel each other
pull each other
fight with each other
Magnetic induction lines represent_________
N pole
S pole
current direction
Magnetic Field
Magnetic field direction: Directed away from ______
S pole
N pole
Top
Bottom
Magnetic field direction: toward _______
S pole
N pole
Top
Bottom
W=?
EIR
CIT
VIR
VIT
Mechanical work=
Force*Power
Force*Distance
VIT
A kid applies a force of 50 N to a ball over 1.1 meters. How much work did he do on the ball?
55J
5.5J
6.1J
55W
Which one is ferromagnetic material
cobalt
silver
aluminium
Can nickel be magnetized?
Yes
No
What current flow through a 6 Ω resistor when a voltage of 12V is applied across it
1A
72A
2A
72W
______________ is a device that measures the amount of Electric energy consumed
electricity meter
ammeter
voltmeter
clock
_______________ is the Maximum voltage at which the electrical meter can operate safely
rated current
Rated voltage
resistnce
rated power
____________ is the product of V & I.
Work
Resisitance
Power
An electrical appliance, the resistance is 5Ω, applied voltage is 10V, what is the power?
10W
20W
50W
50J
1MW=?
1000kW
1000W
1000mW
Select ferromagnetic materials
Iron
Plastic
Nickel
Cobalt
The magnetism of a magnet is weakest at ________of the magnet
Bottom
Top
Poles
Middle
Magnetic Field: Space around a magnet in which a ________ is exerted
electric voltage
G force
Magnetic force
Frictional force
Magnetic field strength is proportional to the ______.
Number of lines/area
Number of lines
Area
None of these
Unlike poles will______
repel
attract
explode
What we use to describe magnetic field?
induction lines
bar magnet
Circuit diagram
A kid applies a force of 90 N to a ball over 2 meters. How much work did he do on the ball?
180J
92W
92J
45W
Which one of the following quantities is equivalent to 1 W?
1 V/A
1 Ω • m
1 V • A
1 V/Ω
A kilowatt-hour is equivalent to
1000 W.
3600 J.
3,600,000 J/s.
3,600,000 J.
What potential difference is required across an 8.0-Ω resistor to cause 2.0 A to flow through it?
4.0 V
16 V
8.0 V
32 V
A 200-W light bulb is connected across a 100-V dc power supply. What current will flow through this bulb?
0.90 A
0.36 A
0.60 A
2.0 A
Electric power is the rate at which charge carriers
pass through an area
do work
move through a potential difference
collide with atoms
parallel circuit need at least _______ path/paths
1
2
3
4
