S11 PHY114 Problem Set 10
S. G. Rajeev
April 27, 2011
Due Monday 25 Apr 2011
1. A radio telescope, whose two antennas are separated by L , is designed
to receive radio waves of frequency f produced by astronomical objects. The
received radio waves create
S11 PHY114 Problem Set 9
S. G. Rajeev
April 13, 2011
Due Monday 18 Apr 2011
1. A lighted candle is placed a distance d in front of a converging lens of focal
length f1 , which in turn is a distance L in front of another converging lens of
focal length f2
S11 PHY114 Problem Set 7
S. G. Rajeev
March 22, 2011
Due Monday 28 Mar 2011
1. An iron atom has a magnetic dipole moment of about 1.8 1023 Am2 .
Determine the dipole moment of an iron bar 9.5cm long 1.6 cm wide and 2.0
cm thick, assuming that all the atom
S11 PHY114 Problem Set 6
S. G. Rajeev
February 25, 2011
Due Monday 14 Mar 2011
1. A particle of mass m and charge q moves in a circular path in a magnetic
eld B . How does its kinetic energy depend on the radius of its orbit? Find
angular momentum of a pa
S11 PHY114 Problem Set 5
S. G. Rajeev
February 18, 2011
Due Monday 28 Feb 2011
1. Recall that the resitance R of a wire is proportional to its length L and
L
inversely proportional to its cross-sectional area A; i.e., R = A . The constant
is the resistiv
S11 PHY114 Problem Set 4
S. G. Rajeev
Feb 16 2011
Due Monday 21 Feb 2011
1. An isolated capacitor C1 carries a charge Q0 . It is then connected by conducting wires to a second capacitor C2 which was previously uncharged. What
is the charge on each capacit
S11 PHY114 Problem Set 3
S. G. Rajeev
January 27, 2011
Due Monday 7 Feb 2011
1. The electric ux through the surface of a box whose sides are 8.1 11.5
12.2 cm is 2000N m2 C 1 . (a) What is the total electric charge inside the
box? (b) Now imagine a sphere
S11 PHY114 Problem Set 2
S. G. Rajeev
January 20, 2011
1
Due Monday 31 Jan 2011
1. The electric eld midway between two equal but opposite charges is 600N C 1 .
The distance between them is 10 cm. What is the magnitude of the charge
on each?
2. A charge Q
S11 PHY114 PROBLEM SET 10
S. G. RAJEEV
D UE M ONDAY 25 A PR 2011
1. A radio telescope, whose two antennas are separated by L , is designed
to receive radio waves of frequency f produced by astronomical objects.
The received radio waves create electronic s
S11 PHY114 Problem Set 1
S. G. Rajeev
January 24, 2011
1
Due Monday 24 Jan 2011
1. When a plastic comb is rubbed against a cloth, 2C of charge is transferred. How many electrons are transferred to make this happen?
2. How many electrons are there in 50 kg
S11 PHY114 Problem Set 8
S. G. Rajeev
April 4, 2011
Due Monday 4 Apr 2011
1.
Find the wavelength of the radio waves emitted by the University of
Rochester radio station (88.5 Mhz)?
The number of bits per second transmitted on a radio signal is about ten
S11 PHY114 Problem Set 7
S. G. Rajeev
March 22, 2011
Due Monday 28 Mar 2011
1. An iron atom has a magnetic dipole moment of about 1.8 1023 Am2 .
Determine the dipole moment of an iron bar 9.5cm long 1.6 cm wide and 2.0
cm thick, assuming that all the atom
S11 PHY114 Problem Set 6
S. G. Rajeev
March 16, 2011
Due Monday 14 Mar 2011
1. A particle of mass m and charge q moves in a circular path in a magnetic
eld B . How does its kinetic energy depend on the radius of its orbit? Find
angular momentum of a parti
S11 PHY114 Problem Set 5
S. G. Rajeev
February 28, 2011
Due Monday 28 Feb 2011
1. Recall that the resitance R of a wire is proportional to its length L and
L
inversely proportional to its cross-sectional area A; i.e., R = A . The constant
is the resistiv
S11 PHY114 Problem Set 1
S. G. Rajeev
January 12, 2011
1
Due Monday 24 Jan 2011
1. When a plastic comb is rubbed against a cloth, 2C of charge is transferred. How many electrons are transferred to make this happen?
2. How many electrons are there in 50 kg
21. Relativity
S. G. Rajeev
December 9, 2010
Today we will study one of the deepest and fascinating discoveries of physics,
mainly due to Albert Einstein. I will not pretend that the theory of relativity
has many everyday applications. It has uses, some g
20. Wave Optics
S. G. Rajeev
December 9, 2010
In most everyday situations we can treat light as if it goes along rays. So
people used to think that light was made of tiny particles. But there are some
phenomena and many devices that depend on the wave pro
6. Electrical Potential
S. G. Rajeev
1
Partial Derivatives
If you have a function of one variable f (x), its derivative measures how much it
changes under a small change of x:
df
f ( x + ) f ( x)
= lim
.
dx 0
Thus
dx2
= 2x,
dx
d
1
3x + x = 3 +
dx
2x
etc.
5. Potential Energy
S. G. Rajeev
January 25, 2011
We know now the force on a charged particle. Next we will understand its
energy.
1
Conservative Forces
Recall that if you exert a constant force F on a particle and it is displaced
by a, the wok you have d
3. The Electric Flux
S. G. Rajeev
January 20, 2011
1
Electric Field Lines
The most important idea we discussed so far so far is the electric eld. If you
place a charge at any point, the electric force it feels is proportional to its charge.
Thus the force
PHY114 S11 Term Exam 3
S. G. Rajeev
Mar 12 2011
12:30 pm to 1:45 pm
PLEASE write your workshop number and your workshop
leaders name at the top of your book, so that you can
collect your graded exams at the workshop.
Derive a formula for the answer before
PHY114 S11 Term Exam 2
S. G. Rajeev
Mar 22 2011
12:30 pm to 1:45 pm
PLEASE write your workshop number and your workshop
leaders name at the top of your book, so that you can
collect your graded exams at the workshop.
Derive a formula for the answer before
PHY114 S11 Term Exam 1
S. G. Rajeev
Feb 15 2011
12:30 pm to 1:45 pm
PLEASE write your workshop number and your workshop
leaders name at the top of your book, so that you can
collect your graded exams at the workshop.
Derive a formula for the answer before