The reason we can read print from any direction is that
A resistor is something placed in a circuit that totally blocks the flow of electrons.
A 10 micro-Coulomb charge is located in a 400 N/C electric field. What is the force experienced by the charge?
a. b. c.
1 x 10-3. N
4 x 10-3. N
4 x 10-3. N/C
The electrical force on a 2 C charge is 20 N. What is the value of the electric field at the location of the charge?
Electrons move in an electric circuit
When light strikes the surface of a material like glass or water it is usually
Laser light is emitted when excited atoms of a solid, liquid, or gas are stimulated to emit photons in phase.
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An electroscope is charged positively, as shown by foil leaves that stand apart. As a negatively charged rod is brought close to the electroscope, the leaves
If you stand 1 m in front of a plane mirror your image appears
Why does a farsighted person have trouble focusing on nearby objects?
Two charges separated a distance of 1.0 meter exert a 2.0-N force on each other. If the charges are pushed to a separation of meter, the force on each charge will be
Two charges separated by a distance of 1 meter exert a 20-N force on each other. If the charges are pulled to a 2 meter separation distance, the force on each charge will be
a. 5N. b. 10N. c. 40N.
Compared to gravity, the electromagnetic force is
What is the resistance of a toaster that uses 5 A of current when connected to a 120 volt power source? (Apply Ohm’s Law.)
A magnifying glass is a
When a wave slows down it
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