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Chapter 25
To determine if an object has “glass charge,” you need to
1. see if the object repels a charged glass rod.
2. see if the object attracts a charged plastic rod.
3. Both 1 and 2.
4. Either 1 or 2.
To determine if an object has “glass charge,” you need to
1. see if the object repels a charged glass rod.
2. see if the object attracts a charged plastic rod.
3. Both 1 and 2.
4. Either 1 or 2.
Rank in order, from most positive to most negative, the
charges qa to qe of these five systems.
1. qa > qe > qd > qc > qb
2. qa = qb > qe > qc > qd
3. qd > qc > qe > qa = qb
4. qd > qc > qe > qa > q
5. qe > qa > qd > qb > qc
Rank in order, from most positive to most negative, the
charges qa to qe of these five systems.
1. qa > qe > qd > qc > qb
2. qa = qb > qe > qc > qd
3. qd > qc > qe > qa = qb
4. qd > qc > qe > qa > qb
5. qe > qa > qd > qb > qc
An electroscope is positively charged by touching it with a
positive glass rod. The electroscope leaves spread apart
and the glass rod is removed. Then a negatively charged
plastic rod is brought close to the top of the electroscope,
but it doesn’t touch. What happens to the leaves?
1. The leaves spread further apart.
2. The leaves get closer together.
3. One leaf moves higher, the other lower.
4. The leaves don’t move.
An electroscope is positively charged by touching it with a
positive glass rod. The electroscope leaves spread apart
and the glass rod is removed. Then a negatively charged
plastic rod is brought close to the top of the electroscope,
but it doesn’t touch. What happens to the leaves?
1. The leaves spread further apart.
2. The leaves get closer together.
3. One leaf moves higher, the other lower.
4. The leaves don’t move.
Charges A and B exert repulsive forces on each other.
qA = 4qB. Which statement is true?
1. FA on B > FB on A
2. FA on B < FB on A
3. FA on B = FB on A
Charges A and B exert repulsive forces on each other.
qA = 4qB. Which statement is true?
1. FA on B > FB on A
2. FA on B < FB on A
3. FA on B = FB on A
An electron is placed
at the position marked
by the dot. The force
on the electron is
1. to the left.
2. to the right.
3. zero.
4. There’s not enough information to tell.
An electron is placed
at the position marked
by the dot. The force
on the electron is
1. to the left.
2. to the right.
3. zero.
4. There’s not enough information to tell.
Rank in order, from largest to smallest, the electric field
strengths E1 to E4 at points 1 to 4.
1.
2.
3.
4.
5.
E2 > E4 > E1 > E3
E2 > E1 = E4 > E3
E2 > E1 > E4 > E3
E1 = E2 > E3 = E4
E1 > E2 > E3 > E4
Rank in order, from largest to smallest, the electric field
strengths E1 to E4 at points 1 to 4.
1. E2 > E4 > E1 > E3
2. E2 > E1 = E4 > E3
3. E2 > E1 > E4 > E3
4. E1 = E2 > E3 = E4
5. E1 > E2 > E3 > E4
Chapter 25
Reading Quiz
What is the SI unit of charge?
1. Coulomb
2. Faraday
3. Ampere
4. Ohm
5. Volt
What is the SI unit of charge?
1. Coulomb
2. Faraday
3. Ampere
4. Ohm
5. Volt
A charge alters the space around it.
What is this alteration of space called?
1. Charged plasma
2. Charge sphere
3. Electric ether
4. Electric field
5. Electrophoresys
A charge alters the space around it.
What is this alteration of space called?
1. Charged plasma
2. Charge sphere
3. Electric ether
4. Electric field
5. Electrophoresys
If a negative charged rod is held near a neutral metal ball,
the ball is attracted to the rod. This happens
1. because of magnetic effects.
2. because the ball tries to pull the rod’s
electrons over to it.
3. because the rod polarizes the metal.
4. because the rod and the ball have opposite
charges.
If a negative charged rod is held near a neutral metal ball,
the ball is attracted to the rod. This happens
1. because of magnetic effects.
2. because the ball tries to pull the rod’s
electrons over to it.
3. because the rod polarizes the metal.
4. because the rod and the ball have opposite
charges.
The electric field of a charge is defined by the force on
1. an electron.
2. a proton.
3. a source charge.
4. a test charge.
The electric field of a charge is defined by the force on
1. an electron.
2. a proton.
3. a source charge.
4. a test charge.