Physics Electrostatics Level: High School
Gauss’ theorem
Charge of uniform density (20 nC/m^2) is distributed over a cylinder surface (radius = 1.0 cm) , and a second coaxial surface (radius = 3.0 cm) carries a uniform charge density of -12 nC/m^2 . Determine the magnitude of the electric field at a point 4.0 cm from the symmetry axis of the two surfaces .
Physics Electrostatics Level: High School
Gauss’ theorem
A uniform linear charge density of 4.0 nC/m is distributed along the entire x axis . Consider a spherical (radius = 5.0 cm) surface centered on the origin . Determine the electric flux through this surface .
Physics Electrostatics Level: High School
If a = 3.0 mm , b = 4.0 mm , Q1 = 60 nC , Q2 = 80 nC , and q = 24 nC in the figure at ‘click here’ , what is the magnitude of the total electric force on q ?
Physics Electrostatics Level: High School
If Q = 16 nC , a = 3.0 m , and b = 4.0 m , what is the magnitude of the electric field at point P shown in at figure at “click here” ?
Physics Electrostatics Level: High School
A charge of 50 nC is uniformly distributed along the y axis from y = 3.0 m to y = 5.0 m . What is the magnitude of the electric field at the origin ?
Physics Alternating Current Level: High School
The current in a circuit at time t seconds is given by i = 80 sin (200 pi t – 0.548) . Find .a) the amplitude , periodic time , frequency and phase angle in degrees stating , with reference to 80 sin 200 pi t, whether it leads or lags .
b) the value of the current when t = 0 ,
c) the value of the current when t = 12 ms ,
d) the time when the current first reaches 50 A .
Physics Vectors Level: High School
Find the resultant of the three displacement vectors in the drawing by means of the component method. The magnitudes of the vectors areA = 5 m
B = 5 m
C = 4 m
Physics Units Level: High School
All of the following are base units of the SI system except .Kilogram
Volt
Kelvin
Meter
Physics Kinematics Level: High School
Projectile
A golf ball is hit by an initial velocity of 60.0 m/s at an angle of 30.0 degrees above the horizontal. How far does it travel ?Physics Waves And Oscillations Level: High School
The formula mg = kx describes a spring that is stretched by hanging an object on it. The constant k is called the spring constant. What are its units ?Kg/s^ s/m kg
Ms^2/kg kgs^2
Nm
Physics Vectors Level: High School
If I walk 8.0 m in a straight line and then walk 5.0 m in another straight line , the total displacement can not have a magnitude of3.0 m 5.0 m
2.0 m 8.0 m
13.0 m
Physics Kinematics Level: High School
One dimensional
When a ball is thrown straight up, which of the following is zero at its highest point ?Velocity
Acceleration
Displacement
Physics Kinematics Level: High School
Projectile
If you increases the initial speed of a bullet by exactly 10% , the resultant range will increase by what percent ( assume air resistance can be ignored) ?10%
11%
20%
5.0%
21%
If it is fired from the same height , time remains the same.
Range = uts the range will also increase by 10%.
Physics Kinematics Level: High School
Projectile
You hit a tennis ball over the net . When the ball reaches its maximum height , its speed is :a) greater than its initial speed
b) less than its initial speed
c) equal to its initial speed
Physics Kinematics Level: High School
A boat can move at 30.0 km/h in still water . How long will it take to move 12 km downstream in a river flowing 6.0 km/h ?