Physics Electrostatics Level: High School
which one of the following statements best explains why it is possible to define an electrostatic potential in a region of space that contains an electrostatic field ?a) Work must be done to bring two positive charges closer together .
b) Like charges repel one another and unlike charges attract one another
c) A positive charge will gain kinetic energy as it approaches a negative charge .
d) The work required to bring two charges together is independent of the path taken .
e) A negative charge will gain kinetic energy as it moves away from another negative charge .
Physics Current Electricity Level: High School
Find the current in each resistor in the figure at ‘click here’
Physics Current Electricity Level: High School
Using the figure at ‘click here’ finda) the current through each capacitor.
b) the voltage drop across each resistor.
Physics Electrostatics Level: High School
As per the figure at ‘click here’ find the charge on each of the capacitors .
Physics Electrostatics Level: High School
In the diagram as shown in the figure at ‘click here’a) find the equivalent capacitance between points a and b
b) find the voltage drop across each capacitor
Physics Electrostatics Level: High School
A proton is released from rest in a uniform electric field of 100,000 volts/m in the positive x direction, as shown in the figure at ‘click here’a) Which way will the proton move ?
b) If the proton moves .05 meter what is the change in electric potential ?
c) What is the force on the proton ?
d) What is the change in electric potential energy ?
Replace the proton with an electron and repeat a, b , c and d .
Physics Electrostatics Level: High School
Two charges are positioned as shown in the figure at “click here”a) Find the Electric field strength E at point A
b) Find the electric potential V at point A
c) Find the force F on an electron at point A
d) Find the potential energy of the pair of charges
Physics Electrostatics Level: High School
Three charges are positioned as shown in the figure at ‘click here’a) What is the force on Q3 due to Q1
b) What is the force on Q3 due to Q2
c) What is the resultant force on Q3
Physics Kinematics Level: High School
One dimensional
speedy Sue , driving at 30.0 m/s , enters a one-lane tunnel . She then observes a slow moving van 155 m ahead traveling at 5.00 m/s . Sue applies her brakes but can accelerate only at -2.00 m/s^2 because the road is wet . Will there be a collision ? If yes , determine how far into the tunnel and at what time the collision occurs . If no, determine the distance of closes approach between Sue’s car and the van .
Physics Kinematics Level: High School
One dimensional
An object moves along the x axis according to the equation x(t) = (3.00 t^2 – 2.00 t + 3.00) m . determine ,a) the average speed between t = 2.00 s and t = 3.00 s .
b) the instantaneous speed at t = 2.00 s and t = 3.00 s ,
d) the instantaneous acceleration at t = 2.00 s and t = 3.00 s
Physics Kinematics Level: High School
One dimensional
A hare and a tortoise compete in a race over a course 1.00 km long . The tortoise crawls straight and steadily at its maximum speed of 0.200 m/s toward the finish line . The hare runs at its maximum speed of 8.00 m/s toward the goal for 0.800 km and then stops to tease the tortoise . How close to the goal can the hare let the tortoise approach before resuming the race, which the tortoise wins in a photo finish ? Assume that , when moving , bother animals move steadily at their respective maximum speeds .
Physics Kinematics Level: High School
One dimensional
a) Use the data provided below to construct a smooth graph of position versus time.
b) By constructing tangents to the x(t) curve, find the instantaneous velocity of the car at several instants. (plot the instantaneous velocity versus time and , from this , determine the average acceleration of the car .
d) What was the initial velocity of the car ?
t(s),x(m)
0, 0
1.0, 2.3
2.0, 9.2
3.0, 20.7
4.0, 36.8
5.0, 57.5
Physics Kinematics Level: High School
One dimensional
A particle moves according to the equation x = 10t^2 where x is in meters and t is in seconds.a) Find the average velocity for the time interval form 2.00 s to 3.00 s .
b) Find the average velocity for time interval from 2.00 to 2.10 s .
Physics Electrostatics Level: High School
A parallel plate capacitor has a potential difference between its plates of 1.2 V and a plate separation distance of 2.0 mm. What is the magnitude of the electric field if a material that has a dielectric constant of 3.3 is inserted between the plates ?
Physics Electrostatics Level: High School
A parallel-plate capacitor with air dielectric has a plate area of 75 cm^2 . If the capacitor is fully charged by a 300-V source and can hold a charge of 7.5 x 10^9 C , What is the distance between the plates ?a) 2.7
b) 3.1
c) 5.3
d) 6.9
