Question 1

Given 3 capacitors: 4.00 $\mu$F, 7.00 $\mu$F, and 9.00$\mu$F; what is the equivalent capacity if they are connected in series?

Accepted Answer

1.98 μF

Question 2

If a Cu2+ ion drops through a potential difference of 12. V, it will acquire a kinetic energy (in the absence of friction) of

Accepted Answer

A)  12. J. 
B)  12. eV. 
C)  24. eV. 
D)  6.0 J. 
E)  6.0 eV. 
A)  12. J. 
B)  12. eV. 
C)  24. eV. 
D)  6.0 J. 
E)  6.0 eV. C

Question 3

What is the electric potential at the center of a hollow metal sphere of outside diameter 14. cm which holds a net charge of 3.3 $\mu$C?

Accepted Answer

0.42 MV

Question 4

The net work done in moving an electron from point A at -50. V to point B at +50. V along the semi-circle path shown in Figure 16-1 is

Accepted Answer

A)  zero. 
B)  -1.6 J. 
C)  +1.6 × 10-17 J. 
D)  -1.6 × 10-17 J. 
E)  not to be determined; not enough information given. 
A)  zero. 
B)  -1.6 J. 
C)  +1.6 × 10-17 J. 
D)  -1.6 × 10-17 J. 
E)  not to be determined; not enough information given.

Question 5

Starting from rest, a proton falls through a potential difference of 1.2 kV. What speed does it acquire?

Accepted Answer

The answer of Starting from rest, a proton falls through...

Question 6

A 0.67 $\mu$F parallel plate capacitor has air between the plates with a separation of 0.33 mm.
(a) What is the plate area?
(b) What charge is on the plates when connected to a 3.0 volt battery?

Accepted Answer

(a) 25. m<

Question 7

Capacitors connected in series always have ________ total capacitance than any of the individual capacities.

Accepted Answer

A)  the same 
B)  less 
C)  more 
D)  Not enough information given. 
A)  the same 
B)  less 
C)  more 
D)  Not enough information given.

Question 8

Equipotential surfaces are always at right angles to the electric field.

Accepted Answer

A) True 
 B)False

Question 9

Why is it dangerous to probe inside a television set even hours after it has been unplugged?

Accepted Answer

Capacitors are charged to larg

Question 10

Charges 6.8 $\mu$C, 6.1 $\mu$C, and -1.5 $\mu$C are brought from infinity to the respective vertices of an equilateral triangle with 11. cm sides.
(a) How much energy did it take to move the charges to the triangle vertices?
(b) What is the potential at the center of the triangle?

Accepted Answer

(a) 1.8 Jo

Question 11

Given 3 capacitors: 4.00 $\mu$F, 7.00 $\mu$F, and 9.00 $\mu$F; what is the equivalent capacity if they are connected in parallel?

Accepted Answer

The answer of Given 3 capacitors: 4.00 $\mu$F, 7.00 $\mu$F,...

Question 12

An electron which moves from the negative to the positive terminal of a 2.0 volt battery loses how much potential energy?

Accepted Answer

A)  2.0 × 10-19 J 
B)  4.2 × 10-19 J 
C)  3.2 J 
D)  2.0 J 
E)  2.0 eV 
A)  2.0 × 10-19 J 
B)  4.2 × 10-19 J 
C)  3.2 J 
D)  2.0 J 
E)  2.0 eV

Question 13

Four charges of equal charge +q are placed at the corners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 $\mu$C, a = 30. mm, and b = 40. mm?

Accepted Answer

2.9 × 10<s

Question 14

Consider a uniform electric field of 50. N/C directed toward the East. If the voltage measured relative to ground at a given point in the field is 80. V, what is the voltage at a point 1.0 m directly South of that point?

Accepted Answer

A)  50 V 
B)  50. kV 
C)  30 V 
D)  zero 
E)  80 V 
A)  50 V 
B)  50. kV 
C)  30 V 
D)  zero 
E)  80 V

Question 15

A charge of 2.0 $\mu$C flows onto the plates of a capacitor when it is connected to a12.V battery. How much work was done in charging this capacitor?

Accepted Answer

A)  12. $\mu$J 
B)  0.14 mJ 
C)  21. $\mu$J 
D)  48. $\mu$J 
E)  24. $\mu$J 
A)  12. $\mu$J 
B)  0.14 mJ 
C)  21. $\mu$J 
D)  48. $\mu$J 
E)  24. $\mu$J

Question 16

What charge appears on the plates of a 2.00 $\mu$F capacitor when it is charged to 100. V?

Accepted Answer

The answer of What charge appears on the plates of...

Question 17

A charged capacitor stores energy, and when the Teflon dielectric between the plates is pulled out the energy stored more than doubles. Where did the extra energy come from?

Accepted Answer

The charged plates have a net attraction

Question 18

The absolute potential at the center of a square is 3. V when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when a second charge of -Q is placed at one of the remaining corners?

Accepted Answer

A)  -6 V 
B)  -12 V 
C)  6 V 
D)  12 V 
E)  zero 
A)  -6 V 
B)  -12 V 
C)  6 V 
D)  12 V 
E)  zero

Question 19

If you find you are able to move a positive charge from infinity (far away) to a particular point without doing any work, can you infer that no other charges are nearby?

Accepted Answer

NO. For example, consider 2 ro

Question 20

Electric potential decreases when moving farther from positive charges or nearer to negative charges.

Accepted Answer

A) True 
 B)False

Exam 16: Electric Potential, Energy, and Capacitance

Given 3 capacitors: 4.00 μ\muμ F, 7.00 μ\muμ F, and 9.00 μ\muμ F; what is the equivalent capacity if they are connected in series?

If a Cu2+ ion drops through a potential difference of 12. V, it will acquire a kinetic energy (in the absence of friction) of

What is the electric potential at the center of a hollow metal sphere of outside diameter 14. cm which holds a net charge of 3.3 μ\muμ C?

The net work done in moving an electron from point A at -50. V to point B at +50. V along the semi-circle path shown in Figure 16-1 is

Starting from rest, a proton falls through a potential difference of 1.2 kV. What speed does it acquire?

A 0.67 μ\muμ F parallel plate capacitor has air between the plates with a separation of 0.33 mm. (a) What is the plate area? (b) What charge is on the plates when connected to a 3.0 volt battery?

Capacitors connected in series always have ________ total capacitance than any of the individual capacities.

Equipotential surfaces are always at right angles to the electric field.

Why is it dangerous to probe inside a television set even hours after it has been unplugged?

Charges 6.8 μ\muμ C, 6.1 μ\muμ C, and -1.5 μ\muμ C are brought from infinity to the respective vertices of an equilateral triangle with 11. cm sides. (a) How much energy did it take to move the charges to the triangle vertices? (b) What is the potential at the center of the triangle?

Given 3 capacitors: 4.00 μ\muμ F, 7.00 μ\muμ F, and 9.00 μ\muμ F; what is the equivalent capacity if they are connected in parallel?

An electron which moves from the negative to the positive terminal of a 2.0 volt battery loses how much potential energy?

Four charges of equal charge +q are placed at the corners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 μ\muμ C, a = 30. mm, and b = 40. mm?

Consider a uniform electric field of 50. N/C directed toward the East. If the voltage measured relative to ground at a given point in the field is 80. V, what is the voltage at a point 1.0 m directly South of that point?

A charge of 2.0 μ\muμ C flows onto the plates of a capacitor when it is connected to a12.V battery. How much work was done in charging this capacitor?

What charge appears on the plates of a 2.00 μ\muμ F capacitor when it is charged to 100. V?

A charged capacitor stores energy, and when the Teflon dielectric between the plates is pulled out the energy stored more than doubles. Where did the extra energy come from?

The absolute potential at the center of a square is 3. V when a charge of +Q is located at one of the square's corners. What is the absolute potential at the square's center when a second charge of -Q is placed at one of the remaining corners?

If you find you are able to move a positive charge from infinity (far away) to a particular point without doing any work, can you infer that no other charges are nearby?

Electric potential decreases when moving farther from positive charges or nearer to negative charges.

Measurement and Problem Solving

Kinematics: Description of Motion

Motion in Two Dimensions

Force and Motion

Work and Energy

Linear Momentum and Collisions

Circular Motion and Gravitation

Rotational Motion and Equilibrium

Solids and Fluids

Temperature and Kinetic Theory

Heat

Thermodynamics

Vibrations and Waves

Sound

Electric Charge, Forces, and Fields

Electric Current and Resistance

Basic Electric Circuits

Magnetism

Electromagnetic Induction and Waves

AC Circuits

Reflection and Refraction of Light

Mirrors and Lenses

Physical Optics: The Wave Nature of Light

Vision and Optical Instruments

Relativity

Quantum Physics

Quantum Mechanics and Atomic Physics

The Nucleus

Nuclear Reactions and Elementary Particles

Filters

Given 3 capacitors: 4.00 $\mu$ F, 7.00 $\mu$ F, and 9.00 $\mu$ F; what is the equivalent capacity if they are connected in series?

If a Cu²⁺ ion drops through a potential difference of 12. V, it will acquire a kinetic energy (in the absence of friction) of

What is the electric potential at the center of a hollow metal sphere of outside diameter 14. cm which holds a net charge of 3.3 $\mu$ C?

A 0.67 $\mu$ F parallel plate capacitor has air between the plates with a separation of 0.33 mm. (a) What is the plate area? (b) What charge is on the plates when connected to a 3.0 volt battery?

Charges 6.8 $\mu$ C, 6.1 $\mu$ C, and -1.5 $\mu$ C are brought from infinity to the respective vertices of an equilateral triangle with 11. cm sides. (a) How much energy did it take to move the charges to the triangle vertices? (b) What is the potential at the center of the triangle?

Given 3 capacitors: 4.00 $\mu$ F, 7.00 $\mu$ F, and 9.00 $\mu$ F; what is the equivalent capacity if they are connected in parallel?

Four charges of equal charge +q are placed at the corners of a rectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 $\mu$ C, a = 30. mm, and b = 40. mm?

A charge of 2.0 $\mu$ C flows onto the plates of a capacitor when it is connected to a12.V battery. How much work was done in charging this capacitor?

What charge appears on the plates of a 2.00 $\mu$ F capacitor when it is charged to 100. V?