LO1 - Electric charge and force worksheet PDF

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PHYSICS 1203 – LO1 Electric charge and force worksheet Name: ________________________________________ ID: ___________________ 1. A) Which of the following particles has a positive charge? a. Proton b. Neutron c. Molecule d. Electron

B) Which of the following particles is not a subatomic particle? a. Proton b. Neutron c. Molecule d. Electron

C) Two balls each having a charge of +3 PC are separated by 20 mm. What is the force of repulsion between them?

checkpoint x x x

All parts of Q1 correct: go to Q3 1 part of Q1 incorrect: go to Q2 More than 1 part incorrect: ask someone at your table or see me for help, then go to Q2

2. A) Which of the following particles has a negative charge? a.

Proton

b.

Neutron

c.

Molecule

d.

Electron

B) When charging an object, which of the following particles move? a.

Proton

b.

Neutron

c.

electron

d.

all of the above

C) Two point charges of -3 nC and +4 nC are 12 mm apart in a vacuum. What is the force of attraction between them?

checkpoint x x

All parts of Q2 correct: go to Q3 1 or more parts of Q2 incorrect: ask someone at your table or see me for help, then go to Q3

3. A) You have seen 2 methods of charging an object (charging by friction, and charging by induction). Which method of charging an object requires the object to be rubbed? a.

charging by friction

b.

charging by induction

c.

both charging by friction and charging by induction

d.

neither of these methods requires rubbing

B) Which of the following is a definition of an electron? a.

the physical property of matter that causes it to experience a force when close to other electrically charged matter

b.

the charge transported by a constant current of one ampere in one second

c.

a negatively charged subatomic particle.

C) Two identical charges separated by 30 mm experience a repulsive force of 980 N. What is the magnitude of each charge?

D) A +15 PC charge is placed 5 cm to the right of a +4 PC charge, and a -6 PC charge is placed 2 cm to the right of the +15 PC charge (as shown in the diagram). 5 cm 2 cm +4 PC

a.

+15 PC

-6 PC

What is the resultant force (magnitude and direction) on the +15 PC charge?

b.

What is the resultant force (magnitude and direction) on the -6 PC charge?

E) A -5nC charge is situated 0.06 m from a +3 nC charge. What will be the magnitude of the force on a +2 nC charge placed at the midpoint of these charges?

checkpoint x x x

All parts of Q3 correct: go to Q5 1 part of Q3 incorrect: go to Q4 More than 1 part of Q3 incorrect ask someone at your table or see me for help, then go to Q4

4. A) Which of the following is a definition of electric charge? a. the physical property of matter that causes it to experience a force when close to other electrically charged matter b. the charge transported by a constant current of one ampere in one second c. a negatively charged subatomic particle.

B) Which of the following is a definition of the Coulomb? a. the physical property of matter that causes it to experience a force when close to other electrically charged matter b. the charge transported by a constant current of one ampere in one second c. An electron is a negatively charged subatomic particle.

C) What is the separation of two -4 PC charges if the force of repulsion between them is 200 N?

D) A -5PC charge is situated 22 cm from a +3 PC charge. What will be the magnitude of the force on a +2 PC charge placed at the midpoint of these charges?

E) A +12 nC charge is placed 5 mm to the right of a -8 nC charge, and a -6 nC charge is placed 2 mm to the right of the +15 nC charge (as shown in the diagram).

-8 nC a.

5 mm

+12 nC

2 mm

What is the resultant force (magnitude and direction) on the -8 nC charge?

b. What is the resultant force (magnitude and direction) on the -6nC charge?

-6 nC

checkpoint x x

All parts of Q4 correct: go to Q5 1 or more parts of Q4 incorrect: ask someone at your table or see me for help, then go to Q5

5. A) Which of the following statements about electric charge is correct? a. Electric charge is a property of matter b. Electric charge can be positive or negative c. Positive charges repel each other d. All of the statements are correct

B) Two point charges initially attract each other with a force of 600 N. If their separation is reduced to one-third of its original distance, what is the new force of attraction?

C) The total charge on two metal spheres 50 mm apart is 80 PC. If they repel each other with a force of 800 N, what is the charge on each sphere?

D) An electron is suspended (stationary) in vacuum directly below a proton. How far away from the proton is the electron (the mass of an electron is 9.11x10-31 kg)...