ACADEMIC EXCELLENCE. REDEFINED
American University of Ras Al Khaimah
SPRING 2014
University Physics II
Home Work n° 2
Date: 16—03-2014
Due Time: 23 -O3 -2014
Problem 1: (10 points)
Evaluate 171,172 and v3 : ’ . \) .
\g \/ - 0‘ \o Problem 2: 110 points!
Ca

Direct Current Circuits
Current and Resistance
Electric Current
Electric current I is the rate of the
flow of charge Q through a crosssection A in a unit of time t.
Q
I
t
1C
1A
1s
+
+Q
A
t
Wire
One ampere A is charge flowing at
the rate of one coulomb per

Capacitance
Objectives
Define capacitance in terms of charge and
voltage, and calculate the capacitance for a
parallel plate capacitor given separation and
area of the plates.
Define dielectric permittivity and apply to
calculations of voltage, electric

Electric Field
Objectives
Define the electric field and determine its
magnitude and direction.
Apply formulas for the electric field
intensity at known distances from
point charges.
Apply Gauss's law for fields around surfaces
of known charge densities

Magnetic Fields
Objectives
Define the magnetic field, discussing
magnetic poles and flux lines.
Solve problems involving the
magnitude and direction of forces on
charges moving in a magnetic field.
Solve problems involving the magnitude
and direction o

Capacitor Circuits
Objectives
Calculate the equivalent capacitance of a
number of capacitors connected in series
or in parallel.
Determine the charge and voltage across
any chosen capacitor in a network.
Electrical Circuit Symbols
Electrical circuits of

Electromagnetic Induction
Objectives
Calculate the magnitude and direction of
the induced current or emf in a conductor
moving with respect to a given B-field.
Calculate the magnetic flux through an
area in a given B-field.
Apply Lenzs law and the righ

Electric Force
Dr Mustapha Merabet, Physics AURAK
Objectives
Explain and demonstrate the first law of electrostatics and discuss charging by contact and by
induction.
Apply Coulombs Law to
problems involving electric
forces.
Define the electron, the
co

Electric Potential
Objectives
Understand an apply the concepts of electric potential
energy, electric potential, and electric potential
difference.
Calculate the work required to move a known charge
from one point to another in an electric field created

Magnetic Fields and Torque
Objectives
Determine the magnitude and direction of
the force on a current-carrying wire in a
B-field.
Calculate the magnetic torque on a coil or
solenoid of area A, turns N, and current I
in a given B-field.
Calculate the ma