WorksheetsUnit 11 exam --- electricity and magnetism
Total questions: 45
Worksheet time: 42mins
Which of the following things is not possible?
a liquid magnet
a broken magnet with with north and south poles
a magnetic field
opposite polarity in a magnet
Magnetic objects are generally grouped into which 2 categories?
Ferromagnetic and paramagnetic
magnetic forces and magnetic fields
permanent magnets and objects that can become magnetized
north poles and south poles
What can destroy a magnet?
breaking it in half
Heat
Extreme cold temperatures
Electricity
What is the fundamental difference between magnetic poles and electric charges?
magnets are are always opposite
charges can be separated, but poles cannot
electric charges are always the same
they are always attracted to each other
Condition of a system that describes opposing physical characteristics.
equilibrium
asymmetry
polarity
magnetism
A force that causes an object to twist or rotate.
Torque
Pressure
Friction
Momentum
What is the speed of a gravitational field?
The speed of sound
The speed of light
The rotational speed of Earth
Molecular speed
What force exists between these 2 magnets?
Attraction
Repulsion
None
On Earth, where is Magnetic North approximately located?
The Equator
The North Pole
The South Pole
Earth's core
The south pole of a magnet is placed next to the south pole of a second magnet. How will they interact?
the magnets will move toward each other
the magnets will stay in place
the magnets will move away from each other
the magnets will become polarized
How is Earth like a giant bar magnet?
It has a magnetic field circling the equator.
It is surrounded by a magnetic field and has a north and south pole.
It absorbs magnetic energy from the sun causing a shift in gravity.
It reflects magnetic energy from the sun causing light to form prisms.
Which statement is true?
The light bulb will light up because the circuit is complete.
The light bulb will light up because the circuit is broken.
The light bulb will not light up because the circuit is complete.
The light bulb will not light up because the circuit is open.
Is this circuit open or closed?
open
closed
If the resistance in a circuit is 45 ohms and the electric potential is 12 V, what is the quantity of the current?
0.27 A
0.27 volts
540 A
3.75 ohms
Complete the following statement: Electric current is the net movement of electric charge _____.
in every direction
in a resistor
in a single direction
through any insulating material
What is the voltage for a circuit with 6 amps and 370 ohms of resistance?
0.016 ohms
0.016 amps
2220 V
61.6 V
The current through a circuit is 3.5 A. Resistance measures 260 ohms. What is the voltage?
910 V
910 A
74.28 V
0.013 ohms
You measure the voltage difference in a circuit to be 5 V and the resistance to be 980 ohms. What is the current?
196 V
0.005 A
0.005 V
196 A
What units measure resistance?
Ω (Ohms)
V (Volts)
A (Amps)
W (Watts)
What size resistor would produce a 2.5 Amp current flow with a 9 Volt battery
22.5 R
22.5 Ohms
3.6 Ohms
3.6 R
What units measure current?
Ω (Ohms)
V (Volts)
A (Amps)
W (Watts)
A charged object transfers charge to an uncharged object by touching it.
conduction
induction
absorption
electrostatic
How many batteries are shown in the diagram?
1
6
2
3
Which type of circuit?
Series
Parallel
When one light bulb in a parallel circuit containing several light bulbs burns out, what happens?
the voltage reverses in the circuit
nothing changes in the circuit
the other bulbs go out
the other bulbs burn brighter
In an electric motor, what does the commutator do?
Works with the brushes to switch positive and negative power
Regulates the speed of the motor by adjusting the power
Provides the power to the motor using the coils
Connects the rotor to the stator
Which statement is true about the diagram?
north pole and south pole
one positive charge and one negative charge
both charges are positive
both charges are negative
Any device that uses electric current through multiple loops of wire to create a magnetic field.
Permanent magnet
Solenoid
Generator
Transformer
The right-hand rule tells you the direction of ____.
the magnetic north pole
the geographic north pole
the strength of a magnetic field
the voltage of the current
What information can you find by using this equation?
the electric force between two charges
the resistance in a wire
the amount of charge that passes a given point in a specific amount of time
the voltage of a power source
Which symbol will always be the value of 9.0 x 109 ?
Fe
q1
r2
ke
