Physics Questions
Explore questions in the Physics category that you can ask Spark.E!
A device that transforms mechanical energy into electrical energy is a
What name is given to the rate at which energy is transferred?
In a step-down transformer, how does the input current compare with the output current?
Electromagnetic induction occurs in a coil when there is a change in
A certain transformer doubles input voltage. If the primary coil draws 10 A of current, then the current in the secondary coil is
If the speed of the magnet is doubled, the induced voltage is
Fred swings a sheet of copper in pendulum fashion between the poles of a strong magnet. The sheet slows in entering the magnetic field because
What happens to the induced voltage if you increase the number of loops in the wire?
Who extended Faraday's law to changing electric fields?
What exactly does a step-down transformer step down?
Does the magnetic force on the longer sides of the generator loop help or hinder the rotation of the generator loop?
The primary of a transformer connected to 180 V has 100 turns. The secondary has 10 turns. This is a step-down transformer.Select the correct equations that show that the output voltage is 18 V
What are the principal differences between an MHD generator and a conventional generator?
What commonly supplies the energy input to a turbine?
What happens when a wire is held between the poles of a magnet?
What happens when a wire is moved between the poles of a magnet?
Faraday's law states that induced voltage in a loop of wire depends upon the rate at which
How does the brightness of the lightbulb powered by the generator change when the speed of the generator increases?
What must change in order for electromagnetic induction to occur in a wire coil?
What important discovery did physicists Michael Faraday and Joseph Henry make?