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WorksheetsElectroscope and Electric Field
Total questions: 85
Worksheet time: 53mins
When the electroscope is charged by touching it with a charged object, this is called ____.
charging by conduction
charging by induction
energizing
grounding
When the electroscope is charged (temporarily) by bringing a charged object near, this is called ____.
charging by conduction
charging by induction
energizing
grounding
When the charge on the electroscope is removed by touching it, this is called ____.
charging by conduction
charging by induction
energizing
grounding
If the electroscope was charged negatively, how does this remove the charge from the electroscope?
Electrons move from the hand to the electroscope
Protons move from the hand to the electroscope
Electrons move from the electroscope to the hand
Protons move from the electroscope to the hand
If the electroscope was charged positively, how does this remove the charge from the electroscope?
Electrons move from the hand to the electroscope
Protons move from the hand to the electroscope
Electrons move from the electroscope to the hand
Protons move from the electroscope to the hand
A negatively charged rod is brought near a neutral electroscope, what happens in the electroscope?
Electrons move from the plate to the vein to make the vein negatively charged.
Protons move from the plate to the vein to make the vein positively charged.
Electrons move from the vein to the plate to make the vein positively charged.
Protons move from the vein to the plate to make the vein negatively charged.
The negatively charged rod that was brought near a neutral electroscope is now removed. What happens in the electroscope?
Electrons move from the plate to the vein to make the vein neutral again.
Protons move from the plate to the vein to make the vein neutral again.
Electrons move from the vein to the plate to make the vein neutral again.
Protons move from the vein to the plate to make the vein neutral again.
A positively charged rod is brought near a neutral electroscope, what happens in the electroscope?
Electrons move from the plate to the vein to make the vein negatively charged.
Protons move from the plate to the vein to make the vein positively charged.
Electrons move from the vein to the plate to make the vein positively charged.
Protons move from the vein to the plate to make the vein negatively charged.
The positively charged rod that was brought near a neutral electroscope is now removed. What happens in the electroscope?
Electrons move from the plate to the vein to make the vein neutral again.
Protons move from the plate to the vein to make the vein neutral again.
Electrons move from the vein to the plate to make the vein neutral again.
Protons move from the vein to the plate to make the vein neutral again.
A negatively charged rod touches the plate of a neutral electroscope, what happens in the electroscope?
Electrons move from the rod to the plate and to the vein to make the vein negatively charged.
Protons move from the rod to the plate and to the vein to make the vein negatively charged.
Electrons move from the vein to the plate and to the rod to make the vein positively charged.
Protons move from the vein to the plate and to the rod to make the vein negatively charged.
The negatively charged rod that was touching a neutral electroscope is now removed. What happens in the electroscope?
Some electrons move from the plate to the vein to even out the concentration of charge and the electroscope has an overall negative charge.
Some protons move from the plate to the vein to even out the concentration of charge and the electroscope has an overall negative charge.
Some electrons move from the vein to the plate to even out the concentration of charge and the electroscope has an overall negative charge.
Some protons move from the vein to the plate to even out the concentration of charge and the electroscope has an overall negative charge.
A positively charged rod touches the plate of a neutral electroscope, what happens in the electroscope?
Electrons move from the rod to the plate and to the vein to make the vein negatively charged.
Protons move from the rod to the plate and to the vein to make the vein positively charged.
Electrons move from the vein to the plate and to the rod make the vein positively charged.
Protons move from the vein to the plate and to the rod to make the vein negatively charged.
The positively charged rod that was touching a neutral electroscope is now removed. What happens in the electroscope?
Some electrons move from the plate to the vein to even out the concentration of charge and the electroscope has an overall positive charge.
Some protons move from the plate to the vein to even out the concentration of charge and the electroscope has an overall positive charge.
Some electrons move from the vein to the plate to even out the concentration of charge and the electroscope has an overall positive charge.
Some protons move from the vein to the plate to even out the concentration of charge and the electroscope has an overall positive charge.
An electroscope is a device with a metal knob, a metal stem, and freely hanging metal leaves used to detect charges. The diagram below shows a positively charged leaf electroscope.
As a positively charged glass rod is brought near the knob of the electroscope, the separation of the electroscope leaves will
decrease
increase
remain the same
Which diagram best represents the charge distribution on a neutral electroscope when a negatively charged rod is held near it?
As shown in the diagram below, a charged rod is held near, but not touching, a neutral electroscope.
The charge on the knob is
positive and the leaves are positive
positive and the leaves are negative
negative and the leaves are positive
negative and the leaves are negative
When an object is placed near a negatively charged electroscope, the leaves of the electroscope diverge farther. Which statement about the object is true?
It must be neutral.
It must be positively charged.
It must be negatively charged.
It may be either positively or negatively charged.
What are the main 2 functions of an electroscope?
Detects charges
Repels charges
Identifies charges nature
Attracts charges
How many possible ways are there to charge an electroscope?
4
3
2
5
How can you neutralize a negatively charged electroscope?
Grounding, by bringing a positively charged metal rod closer.
Grounding, by bringing a negatively charged metal rod closer.
Grounding, by forming contact with a negatively charged metal rod.
Grounding, by touching the conductive sphere.
How can you neutralize a positively charged electroscope?
Grounding, by bringing a positively charged metal rod closer.
Grounding, by bringing a negatively charged metal rod closer.
Grounding, by forming contact with a negatively charged metal rod.
Grounding, by touching the conductive sphere.
The hinged conductor moves further away from the fixed conductor because…
Like charges repel each other
Like charges attract each other
Unlike charges attract each other
Unlike charges repel each other
"An object gains positive charge by free movement of protons from one object to another."
True
False
Which of the following pictures illustrates charging by induction?
1
2
3
4
Which of the following pictures illustrates charging by contact?
1
2
3
4
A positively charged rod touches the plate of a neutral electroscope, what happens in the electroscope?
It gains an overall positive charge
It gains an overall negative charge
The electroscope remains neutral
Charges are separated within the electroscope
A positively charged rod is moved closer to the plate of a neutral electroscope, what happens in the electroscope?
It gains an overall positive charge
It gains an overall negative charge
The electroscope remains neutral
Charges are separated within the electroscope
An object becomes postively charged when which of the following occurs?
In which picture(s) below will the charged objects attract? (click on the picture to see it better)
A and C
B and D
A and B
Material in which electrons/electricity are able to move (through) easily
conductors
detectors
insulators
Movement of a positive charge towards negative charge is called
Electrostatic power
Electrostatic force
Electrostatic work
Electrostatic energy
Positive charge is actually a proton.
True
False
Negative charge is actually an electron.
True
False
Proton has .... charge
Positive
Negative
Neutral
Electron has .... charge.
Positive
Negative
Neutral
A positive charge actually is a (a)
Negative charge is actually an (a)
During rubbing two surface .... is produced
Electrical charge
Electrical energy
Electrical work
It is a device used to detect electrical charge of an object.
It is a
Stethoscope
Electroscope
Oscilloscope
Endoscope
Styrofoam peanuts stick to cat's fur due to
Electrical charge of cat's fur and styrofoam peanuts same
Electrical charge of cat's fur and styrofoam peanuts different
This phenomena is example of
Electrostatics force
Electrostatic work
Electrostatic energy
Angel touches a dome of Van de Graaff. Her hairs stand up right due to
Her body becomes positively charge
Electron from her body flow to the Van de Graaff
Same positive charges between hairs repel
Same negative charges between hairs repel
Combing hair with plastic comb is an example of
Friction
Work
Energy
Hair attracted to the balloon because
Different electrical charges between them repel
Different charge between them attract
Same electrical charge between them attract
Upon sliding down the slide the negative charges from boy's body flow to the slide. Left his body in positively charge.
True
False
His hairs stand straight because
Sweat from hair evaporates to water vapour
Same charge between hairs repel
Hairs and boy's body has different charges
Diagram shows how lightning happen.
Lightning happen when there is .....charge between cloud and ground.
Same
Different
Light from lightning comes from
Collision between positive and negative charge
Collision between positivedpositive charge
This device is called
(a)
Why the gold leaf expand?
Negative charges repel
Negtive charges attract
Which diagram represents the electric fields of a negative point charge, shown by º
Which diagram represents the electric field in the vicinity of a positive electric charge of magnitude Q?
Electric field is dimensionally equivalent to which of the following?
Nm/C
N/C
Nm2/C
N/C2
The number of electric field lines passing through a unit cross sectional area is indicative of:
field direction
field strength
charge motion
charge density
Electric charges are created ______.
by gravitational forces.
separately.
between 2 oppositely charged objects.
by neutrons.
How can a neutral object become charged?
by being dipped in water
by being stuck to the desk with tape
by allowing gravity to work on it
by having electrons added or removed
Based on the arrangement of the electric field lines in the diagram, what are the charges?
both charges are the same
the charges are opposite
they are neutral; no charge
Which statement best describes the electric fields in the image?
The charges are neutral.
Both charges are negative, so the field lines are alike.
The field lines move toward a positive charge and away from a negative charge.
The field lines move away from a positive charge and toward a negative charge.
Which statement describes what is happening in the image at the space indicated by the green arrow?
The field lines are repelled by like charges.
The field lines are repelled by opposite charges.
The field lines are attracted by the like charges.
The field lines are attracted by the opposite charges.
Where can an electric field be found?
below a force field
in a gravitational field
in the space surrounding a charged object
outside of a magnetic field
What happens to the field strength as the distance between two charged objects decreases?
the strength stays the same
the strength increases
the strength decreases
the strength fluctuates between positive and negative
Which diagram correctly shows the electric field around a negative charge?
A
B
they are both positive
Which diagram correctly shows the field lines between two like charges?
A
B
Both
Neither
What particle has a positive charge?
Protons
Electrons
Neutrons
What particle has a negative charge?
Protons
Electrons
Neutrons
The space around an electric charge that causes them to attract and repel is called
Gravity
Electric Field
Magnetism
None of the above
What is going to happen to charges in the pictures?
Attract
Repel
What is going to happen to charges in the pictures?
Attract
Repel
Which is the electric field of a positive charge?
Left
Right
Which is the electric field of a negative charge?
Left
Right
Which diagram correctly shows the electric field around a negative charge?
A
B
they are both positive
Which diagram correctly shows the field lines between two like charges?
A
B
Both
Neither
When an object gains electrons it becomes __________
Neutral
Positively charged
Negatively charged
which is the field for opposite charges
