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Electrostatics Grade 11 > Electric Field Lines > Flashcards

Electric Field Lines Flashcards

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1
Q

What is an electric field line?

A

An electric field line is a visual representation of the electric field around a charged object.

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2
Q

True or False: Electric field lines can intersect each other.

A

False

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3
Q

Fill in the blank: Electric field lines originate from _____ charges and terminate at _____ charges.

A

positive; negative

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4
Q

What does the density of electric field lines indicate?

A

The strength of the electric field.

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5
Q

Multiple Choice: Which of the following statements is true about electric field lines? A) They can cross B) They indicate the direction of the electric field C) They are always straight D) They are not related to charge

A

B) They indicate the direction of the electric field

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6
Q

What shape do electric field lines take around a point charge?

A

Radial lines emanating outward from the charge.

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7
Q

True or False: The direction of electric field lines is from negative to positive charge.

A

False

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8
Q

What is the significance of the arrows on electric field lines?

A

They indicate the direction of the electric field.

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9
Q

Fill in the blank: In a uniform electric field, the electric field lines are _____ and _____ spaced.

A

parallel; equally

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10
Q

Multiple Choice: Which of the following best describes the electric field around a dipole? A) Straight lines B) Circular lines C) Curved lines D) Random lines

A

C) Curved lines

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11
Q

What happens to electric field lines when they encounter a conductor?

A

They terminate on the surface of the conductor.

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12
Q

True or False: Electric field lines can exist in a vacuum.

A

True

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13
Q

What is the relationship between electric field lines and potential energy?

A

Electric field lines point in the direction of decreasing potential energy.

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14
Q

Fill in the blank: The total number of electric field lines leaving a positive charge is _____ to the charge’s magnitude.

A

proportional

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15
Q

What is the term for the region around a charged object where other charges experience a force?

A

Electric field

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16
Q
A
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17
Q

What is the direction of electric field lines for a positive point charge?

A

Away from the charge.

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18
Q

What is the direction of electric field lines for a negative point charge?

A

Towards the charge.

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19
Q

True or False: Electric field lines can cross each other.

A

False.

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20
Q

Fill in the blank: Electric field lines represent the _____ of the electric field.

A

direction and strength.

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21
Q

What do the density of electric field lines indicate?

A

The strength of the electric field.

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22
Q

Multiple Choice: Which of the following best describes the behavior of electric field lines? A) They can end in mid-air, B) They start and end on charges, C) They only exist in a vacuum.

A

B) They start and end on charges.

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23
Q

What is the shape of electric field lines around a positive point charge?

A

Radial outward.

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24
Q

What is the shape of electric field lines around a negative point charge?

A

Radial inward.

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25
True or False: Electric field lines can be used to visualize the strength of the electric field.
True.
26
Fill in the blank: The electric field at a point in space is defined as the _____ per unit charge.
force.
27
What happens to the electric field lines as you move further away from a point charge?
They become less dense.
28
Multiple Choice: Which of the following is true for electric field lines? A) They can form closed loops, B) They can be continuous, C) They can be discontinuous.
B) They can be continuous.
29
What is the mathematical representation of the electric field (E) due to a point charge (Q) at a distance (r)?
E = k * |Q| / r², where k is Coulomb's constant.
30
True or False: The electric field lines can be represented as arrows.
True.
31
What do electric field lines indicate about the force experienced by a positive test charge placed in the field?
The force will be in the direction of the field lines.
32
Fill in the blank: At infinity, the electric field due to a point charge approaches _____ .
zero.
33
What is the effect of having multiple charges on the configuration of electric field lines?
They will superpose and interact, creating a complex pattern.
34
Multiple Choice: What happens to electric field lines when two like charges are near each other? A) They attract each other, B) They repel each other, C) They disappear.
B) They repel each other.
35
What is the significance of the point where electric field lines converge?
It indicates a point of strong electric field strength.
36
True or False: Electric field lines can help determine the work done by the electric field.
True.
37
Fill in the blank: The electric field is a _____ quantity, meaning it has both magnitude and direction.
vector.
38
What is the role of a positive test charge in the context of electric fields?
It is used to determine the direction of the electric field.
39
Multiple Choice: Electric field lines can be used to visualize which of the following? A) Voltage, B) Current, C) Electric field strength.
C) Electric field strength.
40
What is the relationship between electric field lines and equipotential surfaces?
Electric field lines are perpendicular to equipotential surfaces.
41
True or False: Electric field lines can help in predicting the motion of charges within the field.
True.
42
43
What is the shape of electric field lines between two point charges of equal magnitude but opposite charge?
The electric field lines form a pattern that begins at the positive charge and ends at the negative charge.
44
True or False: Electric field lines can cross each other.
False
45
Fill in the blank: The direction of electric field lines is defined as the direction a _________ charge would move.
positive
46
What happens to the density of electric field lines as you get closer to the charges?
The density of electric field lines increases as you get closer to the charges.
47
Multiple Choice: Which of the following best describes the behavior of electric field lines in the region between two equal but opposite charges? A) They diverge, B) They converge, C) They remain parallel, D) They form loops.
B) They converge
48
What is the electric field strength at a point equidistant from two equal and opposite charges?
The electric field strength is zero at the midpoint between the two charges.
49
True or False: The electric field lines can be used to visualize the strength and direction of the electric field.
True
50
What is the significance of the arrows on electric field lines?
The arrows indicate the direction of the electric field.
51
Fill in the blank: Electric field lines originate from ______ charges and terminate at ______ charges.
positive; negative
52
What do electric field lines indicate about the force experienced by a positive test charge placed in the field?
They indicate the direction of the force that a positive test charge would experience.
53
Multiple Choice: Which of the following statements about electric field lines is true? A) They can overlap, B) They can be infinitely long, C) They terminate at neutral points, D) They are always straight lines.
B) They can be infinitely long
54
What is the effect of distance on the strength of the electric field between two point charges?
The strength of the electric field decreases with the square of the distance from the charge.
55
True or False: Electric field lines can be used to calculate the work done by an electric field.
True
56
What is the relationship between electric field lines and potential energy?
Electric field lines indicate the direction of decreasing potential energy for a positive test charge.
57
Fill in the blank: At points very far from two equal but opposite charges, the electric field behaves like that of a ______ charge.
single
58
What is the term for the point in space where the electric field strength is zero between two opposite charges?
Equilibrium point
59
Multiple Choice: How do electric field lines behave outside of the region between two point charges? A) They disappear, B) They continue to extend outward, C) They form a closed loop, D) They become chaotic.
B) They continue to extend outward
60
True or False: Electric field lines are a visual representation of electric field strength.
True
61
What does a greater density of electric field lines indicate?
It indicates a stronger electric field.
62
Fill in the blank: The electric field at a point in space is defined as the ______ per unit charge at that point.
force
63
What is the effect of introducing a third charge in the vicinity of two equal but opposite charges?
The third charge will experience a net force due to the electric fields of both charges.
64
True or False: The electric field is uniform between two equal but opposite charges.
False
65
What is the mathematical relationship for the electric field (E) due to a point charge (Q) at a distance (r)?
E = k * |Q| / r^2, where k is Coulomb's constant.
66
Fill in the blank: The electric field lines from a positive charge will always point ______.
away from the charge
67
What happens to electric field lines as they approach the surface of a conductor?
They become perpendicular to the surface of the conductor.
68
Q: What is the configuration of two point charges with the same magnitude and the same sign called?
A system of two like charges (e.g., +q and +q or -q and -q).
69
What is the direction of electric field lines for two positive charges?
Field lines radiate outward from both charges and never touch.
70
Do electric field lines intersect in a system of two like charges?
No, field lines never intersect.
71
What happens to electric field lines between two like charges?
They repel and curve away from each other.
72
Where is the electric field zero in a system of two identical like charges?
At the midpoint between the charges.
73
What does the region between two like charges show?
Strong repulsion and high field line curvature.
74
Are the field lines symmetrical in a two-like-charge system?
Yes, they are symmetrical about the axis joining the charges.
75
How are electric field lines drawn for two negative charges?
Field lines converge toward both charges.
76
What happens to field strength as you move away from both charges?
They appear as if coming from a single larger charge.
77
Can electric field lines form closed loops?
No, they begin on +ve and end on -ve (not applicable for like charges).
78
What is the net electric field direction at the midpoint between two like charges?
Zero, due to equal and opposite contributions.
79
Why do field lines curve between like charges?
Because the charges repel, so the lines bend outward.
80
How does symmetry help in sketching field lines?
It ensures equal spacing and accurate direction.
81

Electrostatics Grade 11 (3 decks)

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