Electrostatics
Which law states the force between electric charges?
Coulomb's Law
The strength of an electromagnet can be affected by...
Changing the current in the wire, adding more coils, and increasing the mass of the iron core
Electromagnetic waves vary in
Wavelength and Frequency
The number of wavelengths that pass a point each second
Frequency
A student placed a pencil in a cup of water. The pencil appears broken because light-
bends when it passes through water
_____ is a branch of physics that deals with the study of stationary electric charges
Electrostatics
Bob made an electromagnet but it was very weak. How can he make it stronger?
use thicker wire
To Calculate the frequency of an electromagnetic wave, you need to know the speed of the wave
Wavelength
What does the pitch depend on?
Frequency
Why does the lower part of the child appear so much different in size from the upper part?
The light rays that travel through water and then into air are refracted.
As per Coulomb's law, the force of attraction or repulsion between two point charges us directly
Product of the magnitude of charges
A ____ is a current-carrying coil of wire with many loops
Solenoid
Lights acts like..
Both a wave and a particle
Sound waves move faster in what temperature
Heat
What do we call this tool that separates white light into the colors of the Visible Spectrum?
Prism
Which of the following statements is false for a perfect conductor?
D.) None of these
How do electromagnets differ from regular magnets?
They can be turned off and on, Their polarity can be reversed, and Their strength can be changed
The full range of frequencies of electromagnetic radiation is called
The electromagnetic spectrum
Sound travels fastest through what material?
A metal such as iron
____ are thick in the middle and thin at the edges.
Convex lenses
When you touch a charged body, the charge flows through you into the earth. This is called
Earthing
The flow of electrical energy start at the ___ side of the d-cell.
The wave with the longest wavelengths in the electromagnetic spectrum are
Radio waves
The average frequency range for human hearing is
20-20000 Hz
When light waves move from passing through air to passing through a glass lens when happens to them?
They slow down and change direction