**Physics 205: General
Physics II**

Final Exam version 1

**Instructions: You are
allowed only your calculator and formula cards for this exam. You have 2 hours
to complete the exam. Answer All of the
following questions .**

___
1.two ^{Choose
ONE}

___
2. three

___
3.five

___
4.twenty five

___
5.ten

**2.** Six
identical resistors are connected first in parallel and then in series.

Which combination has the greater resistance?

___ 1. the set in parallel

___ 2. the set in series

___ 3. the two combinations have the same resistance

___ 4. walrus

**3.** Two
test charges are brought separately into the vicinity of a charge **+ Q**. First, test charge +

Compared with the electrostatic *Force *of the charge at *A*,
that of the charge at *B *is

___1. greater.

___2. smaller.

___3. the same.

**4. **In
order to increase the electrical energy stored in a parallel-plate capacitor
when

an electric potential is applied, we should

___ 1. increase the surface area of the plates.

___ 2. increase the separation between the plates.

___ 3. Carry it to the top of a tall building

___ 4. all of the above

___ 5. two of the above

___ 6. none of the above

**5.
**A 12 volt battery is connected to a series circuit
with 110 W
equivalent resistance. If the circuit is
closed for 90 seconds, what is the total
charge that passed through the circuit? ( remember how current is defined !)

___1. 0.11 coulombs

___2. 9.81 coulombs

___3. 9.16 coulombs

___4. 0.0012 coulombs

**6. **The magnetic domains in a **non-magnetized**
piece of iron are characterized by which orientation?

___
1. Parallel to the magnetic axis.

___ 2. Antiparallel to the
magnetic axis.

___
3. Perpendicular to the magnetic axis.

___
4. Random with the vector sum magnetization equaling zero.

**7. **An electrical current is applied across a solenoid (coil of
wire). As a result of the current a

___1. magnetic field is produced in the direction of
the current.

___2.
magnetic field is produced perpendicular to the direction of the
current.

___3. Only an
electric field is observed.

___4. None of the above.

**8. ** The force on a charged particle created by its
motion in a magnetic field is at maximum at what angle between the particle's
velocity and the field?

___1. zero

___2. 33.33.

___3. 45.

___4 90.00

**9. **The force exerted on a
charged particle in a uniform external magnetic field is directly proportional
to which of the following.

___1.
velocity

___2. Field strength.

___3. both.

___4 neither

**10. **The path of** **a
charged particle moving parallel to a uniform magnetic field will be ..

___1. A straight line

___2. A circle.

___3. A triangle.

___4 what--everrr

**11. **You stand two meters away from a plane mirror. How
far is it from you *to your image*?

___ 1. 2m

___ 2. 4m

___ 3. 6m

___ 4. 8m

**13. **A 3cm tall object is placed along the principal axis
of a thin biconvex lens with focal length 30 cm. If the
object distance is 40cm, what is the image distance and image height?

___ 1. 17 cm away and 7 cm high.

___ 2 120 cm
away and 9 cm high.

___ 3. No image formed

___4 120 cm
1 cm high.

**14.**Which of the following
describes the image that forms for a convex lens when the object distance is
less than the focal length of the lens?

___1. Inverted, enlarged and real.

___2.
Upright, enlarged and virtual.

___3.
Upright, smaller and virtual.

___4. Inverted, smaller and real.

**15.**
Which of the following describes the image that forms for a convex lens when
the object distance is greater than the focal length of the lens?

___1. Inverted, enlarged and real.

___2. Inverted, smaller and real..

___3.
Upright, smaller and virtual.

___4. Upright, enlarged and virtual

**16**. A beam of white light is incident upon a
prism, and dispersed into its various components. Which color will show the greatest angle of
deviation

___1.
orange

___2. violet.

___3. red.

___4 green

___5 yellow

___6 blue

**17.
**Water has an index of refraction of 1.333. What is the speed of light in water?

___1. 4x10_{}^{8 }m/s

___2. 2.25x10_{}^{8 }m/s

___3. 4.46x10_{}^{8 }m/s.

___4 1.46x10_{}^{8
}m/s

**18.** Rank each
form of electromagnetic radiation
according to energy from highest to lowest.

___x-rays

___microwaves

___ultraviolet light

___blue visible light

___infrared light

**19.** You
are at rest on a platform at a railroad station. A train approaches the
platform

blowing its whistle. As the train approaches you, the
pitch of the whistle

___ 1. Is higher relative to a person on the train.

___ 2. Is lower relative to a person on the train.

___ 3. Oscillates both high and low.

___ 4. depends on the amplitude of the sound.

**20. **For the following
arrangements of resistors shown, what is
the equivalent resistance between points A and B?

**21.
**For the following orientations of velocity and magnetic field,
determine the direction

of
the force.

**Part 2 **

**23**. Three
point charges lie at the corners of an equilateral triangle, 1 cm on each
side. The charges at the corners are +2
, +4 and +6 microcoulombs respectively.
If the +2 microcoulomb charge is free to move, and the others are fixed
in space, what will be the magnitude and direction of the force encountered by
the 2 microcoulomb charged body?

**Part 2**

**24.**An
electron is accelerated in a TV cathode ray
tube through a potential difference of

50,000 volts.
What is the electric field the electron encounters if the plate
separation is 3 cm? What is the
magnitude of the force felt by the electron?
If the electron mass is 9.11x 10 ^{–31} kilograms, what is the
magnitude of the acceleration?

Determine the time required for the electron to traverse
3cm.

**Part 2**

**25**. Two
uniformly charged spheres are fastened to and electrically insulated from

frictionless pucks on an air hockey table. The charge on
sphere 2 is three times the charge on sphere 1 which has 5 microcoulombs
charge. They are separated by a distance of 0.3 meters. What is the force encountered by each of the charged spheres? Is it attractive or repulsive? If the first
sphere is twice as massive as the second, its acceleration would be what?

**BONUS:**

**26.** For the following circuit **R1 =R2**, The current leaving the
battery, **I = 4A**, and the
voltage, **V=12 volts**. Determine the
resistance of **R1 **and **R2** and **R _{eq}**