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Practice exam 1
1) A conductor receives a positive charge, does
its mass increase, decrease, stay the same?
2) The distance between two charges is
doubled, what happens to the electric force?
3) What is the electric field inside any charged
4) A box encloses a charge distribution. The are
more field lines coming out of the box than
into the box. Is the net enclosed charge
positive or negative.
5) A negatively charged plate is held above a
positively charged plate. What direction does
the electric field point?
6) Where is the electric field stronger? Where
the field lines are closer or farther apart.
7)Charge 1 attracts Charge 2. Charge 1 repels
Charge 3. Do Charges 2 and 3 repel or attract?
8) If you have a charged conducting cup. Where
does most of the charge accumulate? On the
bottom or on the rim.
9) You have an electric dipole and you draw the field
lines. How many of the field lines intersect?
10) The electric field from which charge distribution
falls off the quickest in terms of distance.
line charge, point charge, sheet of charge
11) A positive charge moves from away from a
positively charge plate towards a negatively
charged plate. Does the charge gain or lose
potential energy?
12) Equipotential lines are parallel or perpendicular
to electric field lines.
13)As a positive charge moves along an electric
field line, it gains or loses kinetic energy?
14) A capacitor consists of two parallel plates.
To reduce the capacitance, move the plates
closer together or farther apart.
15) Using two capacitors of capacitance C, what
values of capacitance can be obtained?
16) The potential difference across two
capacitors in parallel is the same for each
True or False
• Ch. 15
– Number 49
– Number 59
• Ch. 16
– Number 8
– Number 13 A
– number 39
A parallel plate capacitor has two horizontally
mounted plates of area 2 m2, that are separated
by a distance of 0.4 meters. When a 12 volt
battery is connected across the plates, calculate
the energy stored in the battery.
What is the resulting capacitance after filling the
space between the plates halfway with water?