Question 1

The leaves of a positively charged electroscope diverge more when an object is brought near the knob of the electroscope. The object must be:

Accepted Answer

A)  a conductor 
B)  an insulator 
C)  positively charged 
D)  negatively charged 
E)  uncharged 
A)  a conductor 
B)  an insulator 
C)  positively charged 
D)  negatively charged 
E)  uncharged

Question 2

A coulomb is the same as:

Accepted Answer

A)  an ampere/second 
B)  half an ampere . second2 
C)  an ampere/meter2 
D)  an ampere .second 
E)  a newton .meter2 
A)  an ampere/second 
B)  half an ampere . second2 
C)  an ampere/meter2 
D)  an ampere .second 
E)  a newton .meter2

Question 3

The magnitude of the total negative charge on the electrons in 1 kg of helium (atomic number 2, atomic mass 4) is:

Accepted Answer

A)  48 C 
B)  2.4*107 C 
C)  4.8 *107 C 
D)  9.6 *108 C 
E)  1.9 *108 C 
A)  48 C 
B)  2.4*107 C 
C)  4.8 *107 C 
D)  9.6 *108 C 
E)  1.9 *108 C

Question 4

An electrical insulator is a material:

Accepted Answer

A)  containing no electrons 
B)  through which electrons do not flow easily 
C)  which has more electrons than protons on its surface 
D)  cannot be a pure chemical element 
E)  must be a crystal 
A)  containing no electrons 
B)  through which electrons do not flow easily 
C)  which has more electrons than protons on its surface 
D)  cannot be a pure chemical element 
E)  must be a crystal

Question 5

Two particles, each with charge Q, and a third particle, with a charge q, are placed at the vertices of an equilateral triangle as shown. The total force on the particle with charge q is:

Accepted Answer

A)  Parrallel to the left side of the triangle 
B)  Parrallel to the right side of the triangle 
C)  Parrallel to the bottom side of the triangle 
D)  perpendicular to the bottom side of the triangle 
E)  perpendicular to the left side of the triangle 
A)  Parrallel to the left side of the triangle 
B)  Parrallel to the right side of the triangle 
C)  Parrallel to the bottom side of the triangle 
D)  perpendicular to the bottom side of the triangle 
E)  perpendicular to the left side of the triangle

Exam 21: Electric Charge

The leaves of a positively charged electroscope diverge more when an object is brought near the knob of the electroscope. The object must be:

A coulomb is the same as:

The magnitude of the total negative charge on the electrons in 1 kg of helium (atomic number 2, atomic mass 4) is:

An electrical insulator is a material:

Two particles, each with charge Q, and a third particle, with a charge q, are placed at the vertices of an equilateral triangle as shown. The total force on the particle with charge q is:

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