# Quiz: Do you Know how Induction Cooktops Work?

3 min
Image: Hemera/Thinkstock

What do you know about induction cooking? Is induction cooking better than conventional cooking? Take our thought-inducing quiz to learn about induction cooking.
How does an induction cooktop compare to conventional cooktops?
heats faster and is easier to clean
Induction cooktops heat up faster than an electric cooktop, have a temperature response like a gas cooktop and are easier to clean than a glass cooktop.
easier to clean but cooks at a lower temperature
heats more slowly but reaches a higher temperature

What is heated during conventional cooking?
the food only, not the cookware
the entire surface of the pot or cookware
the surface of the pot or cookware that touches the heat source
Any part of the pot or cookware that touches the heat source is heated -- the rest of it is heated through conduction.

How precisely can temperature be controlled through induction cooking?
very accurate
Not only does it facilitate accurate temperature settings, it also allow you to cook at very low temperatures.
not at all accurate
depends on the brand

The term electromagnetism refers to the relationship between __________.
protons and electrons
electricity and magnetism
Electromagnetism is what science uses to describe the force that governs both electricity and magnetism.
magnetism and electrons

How does electromagnetism occur?
A circuit of alternating current causes a current to flow in another circuit.
Electromagnetism occurs by having two circuits close to each other but not touching. The first has an alternating current, which generates a current flow in the second circuit.
A direct current such as a battery causes a current to flow in another circuit.
A magnetic field generates electricity and sparks an alternating current.

What scientific principles are bound by Faraday's Law?
All electric currents have gravitational forces that generate magnetic fields.
All electric currents have magnetic fields, but alternating currents have magnetic fields that fluctuate and induce other currents to flow.
According to scientist Michael Faraday, all electric currents have magnetic fields, but alternating currents have fluctuating magnetic fields that cause other currents to flow.
All electric currents have induction properties, but magnetic fields generate more currents to flow.

How does induction cooking work?
Coils carrying alternating current affect the surrounding magnetic field and induce current in the cookware.
Beneath the cooktop surface are coils of alternating current. Through electromagnetism, they induce currents in the ferromagnetic cookware placed on top.
Electromagnetic current heats the cookware by causing the coils beneath to reach high temperatures.
Ferromagnetic cookware generates an electric current in the cooktop and heats the food.

How many volts are induced in the cookware surface during induction?
1 volt
A mere 1-volt current is induced in the cookware surface.
5 volts
10 volts

What are eddy currents?
swirling currents
small electric currents
Eddy currents are small electric currents that are induced by the 1-volt current flowing through the cookware.
incomplete circuits

Why is iron the material of choice for induction cookware?
It is an excellent conductor.
It converts the flow of the current into heat.
Iron is a lousy conductor; instead, it turns the flow of the current into heat.
It allows currents to flow easily through it while generating high heat.

Are aluminum pots a good choice for induction cooking?
only if they have copper bottoms
only if they have iron bottoms
Aluminum is an excellent conductor, so it makes a poor choice for induction. At best, aluminum pots can be used if they have iron bottoms.
never

How can you tell if your pot is suitable for induction cooking?
If a magnet sticks to the bottom of the pot, it'll probably be good for induction.
Use the old magnet trick. If it sticks to the bottom of the pot, chances are you can use it for induction cooking. Cast iron cookware is a sure thing.
If your pot is ovenproof, it'll probably be good for induction.
The bottom of the pot will say "Induction Certified."

How much faster than a conventional cooktop does an induction cooktop heat up?
10 to 20 percent faster
25 to 50 percent faster
Induction cooktops usually heat up 25 to 50 percent faster than conventional cooktops.
50 to 75 percent faster

How much radiation does induction cooking emit?
less than an airport scanner
It emits less radiation than an airport scanner but enough to get clearance from a doctor if the chef has a pacemaker.
more than an airport scanner
about the same as a small x-ray

What is the price comparison between induction cooktops and gas ones?
Induction cooktops can be three times the price of gas ones.
Induction cooktops are costly. They can run around three times the price of gas ranges.
They cost around the same.
Gas cooktops are more expensive.

Why might the installation of an induction cooktop be unsuitable above an oven?
It would sit too low.
It would be inaccessible by people in wheelchairs.
It might have a fan underneath.
Some induction cooktops have fans underneath them, so you need to determine their suitability for installation above an oven.

How much heat radiates from an induction cooktop surface?
none
Happily, induction cooking generates zero heat radiation.
minimal heat
the same as a conventional stovetop

What were induction cooktops originally designed for?
nuclear testing
restaurants and industrial use
Induction cooktops were first designed for restaurants and industrial use.
chemistry labs

What voltage and amperage do you need for induction cooking?
110 to 120 volts and more than 50 amperes
208 to 240 volts and up to 50 amperes
Check with your electrician that you have a capacity for 208 to 240 volts and up to 50 amperes.
208 to 240 volts and up to 100 amperes