Physics Electrostatics Level: High School
Given a coil of wire and a small light bulb , how can you tell whether the current in another coil is direct or alternating without touching the second coil or its connecting wires ?
Physics Electrostatics Level: High School
A beam of protons , at first moving slowly , is accelerated to higher and higher speeds . When the protons are moving slowly , the beam spreads out , but when they are moving fast , the beam diameter decreases . What do you think the reason for this behavior ?
Physics Electrostatics Level: High School
A length of copper wire AB rests across a pair of parallel copper wires that are connected to a battery through a switch . The arrangement is placed between the poles of a magnet and the switch is closed . In what direction does the wire AB move ?
Physics Electrostatics Level: High School
What aspect of superconductivity has prevented its large scale application thus far ?Physics Electrostatics Level: High School
How is the movement of electricity through air different from its movement through a copper wire ?
Physics Electrostatics Level: High School
A person can be electrocuted while taking a bath if he or she touches a poorly insulated light switch . Why is the electric stock received under these conditions so much more dangerous than usually ?
Physics Electrostatics Level: High School
Nearly all the mass of an atom is concentrated in this nucleus . Where is its charge located ?
Physics Electrostatics Level: High School
Electricity was once thought to be weightless fluid , an excess of which was "positive" and a deficiency of which was "negative" , What phenomena can this hypothesis still explain ? What phenomena can it not explain ?
Physics Electrostatics Level: High School
A solid conducting sphere of radius 2.00 cm has a charge 6.00 micro C . A conducting spherical shell of inner radius 4.00 cm and outer radius 5.00 cm is concentric with the solid sphere and has a charge -3.80 micro C . Find the electric field at the following radii from the centre of this charge configuration .a) r= 7.00 cm
Physics Electrostatics Level: High School
A Sytrofoam ball covered with a conducting paint has a mass of 6.0 10-3 kg and has a charge of 4.2 micro C . What electric field directed upward will produce an electric force on the ball that will balance its weight ?
Physics Electrostatics Level: High School
An object with a net charge of 16 micro C is placed in a uniform electric field of 560 N/C , directed vertically . What is the mass of the object if it "floats" in the electric field ?
Physics Electrostatics Level: High School
Two small beads having positive charges 24q and q are fixed at the opposite ends of a horizontal insulating rod , extending from the origin (the location of the large charge )to the point x = d . As shown in the figure at "click here" , a third small charged bead is free to slide on the rod .At what position is the third bead is equilibrium ?
Physics Electrostatics Level: High School
Three point charges are located at the corners of an equilateral triangle as shown in figure at "click here" (q=3.50 micro C, L = 0.850 m) . Calculate the net electric force on the 7.00 micro C charge .
Physics Electrostatics Level: High School
Suppose that 2.00 g of hydrogen is separated into electrons and protons . Suppose also that the protons are placed at the earth's North Pole and the electrons are placed at the South Pole . What is the resulting compress ional force on the Earth ?
Physics Electrostatics Level: High School
In a uniform electric field of magnitude E, the field lines crosses through a rectangle of area A at an angle of 43.0 degree with respect to the plane of the rectangle . What is the magnitude of the flux through the rectangle ? Answer in terms of E and A .