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WorksheetsSubtopic 5.1 - Electric Fields
Total questions: 23
Worksheet time: 19mins
This law says that the magnitude of the electric force between two charged objects is directly proportional to the charge on each object and inversely proportional to the distance between the charges.
Law of inertia
Gravitational Law
Coulomb's Law
Superposition Principle
The graph shows the relationship between the force of interaction and the magnitude of charge. What type of relationship is this?
Direct
Indirect
Inverse
Reverse
The image shows two charged particles with a force of 2.4 N. What would you predict the force of interaction would be when the magnitude of charge on q2 doubles?
9.6 N
4.8 N
1.2 N
.6 N
Two charges of equal magnitudes and at a distance r exert a force F on each other. If the charges are halved and distance between them is doubled, then the new force acting on each charge is
F / 8
F / 4
4F
F/16
A 5 C and 8 C are 8 m apart. What is the force between them?
5.625 x 109
5.625 x 10-9
4.5 x 1010
4.5 x 10-10
A charge of 4 C and -7 C are 200 m apart. What is the force between them?
6.3 x 106
-6.3 x 106
2.52 x 1011
-2.52 x 1011
An electrostatic force of 2 X 102 N is exerted on a charge of 4 Coulomb at point P in an electric field. What is the magnitude of the electric field intensity at P?
8 X 102 N/C
5 N/C
2 X 10-2 N/C
50 N/C
A point charge Q has a distance of 2 meters from other charge with an electric field of 20 N/C. How much force does a 5 Coulombs charge feels?
4 N
100 N
40 N
10 N
Which statement accurately describes the charged particles in Diagram A?
The particles have opposite charges:
Blue: Negative Red: Positive
The particles repel one another.
The particles have like charges:
Blue: Negative Red: Negative
The particles attract one another.
The particles have opposite charges:
Blue: Positive Red: Negative
The particles attract one another.
The particles have like charges:
Blue: Positive Red: Positive
The particles attract one another.
A positive charge of 1.5 x10-8 C experiences a force of 0.025 N to the left in an electric field. What is the magnitude of the field?
1.7 x 106 N/C
2.0 x 106 N/C
3.4 x 106 N/C
1 x 106 N/C
The potential difference between two points, A and B, in an electric field is 2.00 volts. The energy required to move a charge of 8.00 x 10-19 coulomb from point A to point B is
2.50 x 1018 J
1.60 x 10-18 J
6.25 x 1017 J
4.00 x 10-19 J
How much work is required to move 3.0 coulombs of electric charge a distance of 0.010 meter through a potential difference of 9.0 volts?
3.0 x 10-2 J
3.0 J
27 J
2.7 x 103 J
What measures current?
Electroscope
Meter
Ammeter
All of the above
When a conductor carries a current, the number of conduction electrons that flow in the conductor for 10 s is 3.75 ×1020 . What is the current that flows in the conductor?
3.8 A
4.2 A
6.0 A
10 A
A neon lamp is connected to a battery. If a constant current of 1.25 A flows to the lamp, how long will it take for a charge of 15 C to flow through the lamp?
8.3 s
12 s
16 s
19 s
A conductor of cross-sectional area 0.10 mm2 carries a current of 2.5 A. If the number of conduction electrons per cubic metre is 1.0×1028 m−3 . What is the value of drift velocity of the free electrons in the conductor?
1.6 ×10−2 m s−1
3.9undefined
3.0 ×10−3 m s−1
6.2undefined
Which statement is true about the drift velocity of the electrons in a current-carrying metallic conductor?
It is directly proportional to the diameter of the conductor.
It is inversely proportional to the current.
It is inversely proportional to the number of conduction electrons per unit volume.
It is directly proportional to the resistance of the conductor if the potential difference across the conductor is kept constant.
A conductor of length 2.0 m and cross-sectional area 5.0 ×10−6 m2 carries a current of 6.0 A. If the drift velocity of the conduction electrons is 1.5 ×10−4 m s−1 , what is the number of electrons in the conductor?
2.5 ×1023
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4.2undefined
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