Random Physic Quiz
Working principle of induction cooker
= alternating ____flows through the coil at____ frequency
= change of____field occurs
= _____ produce heat energy at the bottom of the pan
current, high, magnetic, eddy currents
Imagine you’re pushing a swing. If someone suddenly pulls the swing away from you as you try to push it, it resists you—that’s kind of what ____ does.
induced current
*When something causes a change in the magnetic field (like moving a magnet near a coil of wire), the wire doesn’t just accept it silently. Instead, it creates a current that pushes back against the change—as if it’s saying, “Hey! Don’t change my magnetic vibes so suddenly!”
/
Lenz's Law
The ___ always flows in a direction that ____ the change of magnetic ___ that causes it
induced current, opposes, flux
Electromagnetism :
🖍️Transformation of energy: Electrical energy ➡️ ___ energy
🖍️Physics rule:
______
🖍️Method to increase the forces:
• Increase the strength of___
• Use stronger magnet bar
• Increase the ___
• Increase the number of magnet bar
• ____ the distance between magnet bar
kinetic, Fleming’s Left-hand rule, magnetic field, current, decrease
🧲Levitation is the process of keeping an object in a stable position without physical contact or mechanical support, by using an _____ force to counteract _____.
🧲Magnetic levitation (____) or magnetic _____ is a method by which an object is suspended with no support other than magnetic fields.
🧲Magnetic force is used to ____ the effects of the gravitational force and any other forces.
upward, gravity, maglev, suspension, counteract
Magnetic field is a region where magnetic material experience ___.
force
mass increase, force___
increases
force increases, acceleration___
increases
mass increases, acceleration___
decreases