Physical Science: Electromagnetism - Class -IX
Description: electromagnetism,solenoids,induction,transformers,Science,Physics,grade 9 | |
Number of Questions: 15 | |
Created by: Nitesh Divan | |
Tags: science |
What uses induction to change mechanical energy to electrical energy (the opposite of a motor)?
What uses induction to increase or decrease the voltage of alternating currents?
Using a magnetic field to create an electric current within a wire is known as:
What scientist discovered magnetic fields can create electric currents not just vice versa?
What energy transformation occurs within an electric motor?
What device is used to measure the strength and direction of an electric current in a wire?
T/F: Incredibly fast maglev trains use powerful electromagnets to levitate above the tracks.
Which of the following objects does NOT use an electromagnet for power?
Which has a stronger magnetic field?
Once an iron core is placed into the coil of a solenoid, it becomes:
Increasing the number of coils in a solenoid also increases the strength of ______.
What produces a magnetic field using a coil of wire to carry an electric current?
T/F: Oersted discovered an electric current's direction affects the magnetic field around it.
Which scientist accidentally discovered the connection between electricity & magnets in 1820?
Electromagnetism occurs when electric currents interact with ________.