Electricity: Magnetic & Heating Effects

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Magnetic & heating concepts quiz

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Hamsa Lekha

India

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Froggy Jumps Electricity: Magnetic & Heating EffectsVersión en línea Magnetic & heating concepts quiz por Hamsa Lekha 1 What happens when electric current passes through a conductor? a It produces heat due to I^2R losses. b It cools the conductor c It changes color immediately 2 Which device demonstrates the magnetic effect of current to lift objects? a A diode b Electromagnet c A resistor 3 The heating effect of electric current is most useful in which appliance? a Electric heater b Television c Fan 4 Which factors affect heating effect in a circuit? a Voltage only b Frequency only c Current, resistance, and time 5 To get more heating in a wire, you should increase: a Only current b Current, resistance, and time c Only length of wire 6 To strengthen the magnetic field of a coil, you should: a Remove the core b Increase current, number of turns, and use an iron core c Decrease current 7 Why is an insulating coating important on wires? a Prevents electric shocks and short circuits b It absorbs heat c It lowers resistance 8 What is a magnet produced by electric current called? a An electromagnet b A permanent magnet c A bar magnet 9 Which device/effect is used in loudspeakers to move the diaphragm? a Chemical effect b Heating effect only c Magnetic effect of current 10 The unit of electric current is what? a Ohm (Ω) b Ampere (A) c Volt (V)

Froggy Jumps

Electricity: Magnetic & Heating EffectsVersión en línea

Magnetic & heating concepts quiz

por Hamsa Lekha

What happens when electric current passes through a conductor?

It produces heat due to I^2R losses.

It cools the conductor

It changes color immediately

Which device demonstrates the magnetic effect of current to lift objects?

A diode

Electromagnet

A resistor

The heating effect of electric current is most useful in which appliance?

Electric heater

Television

Fan

Which factors affect heating effect in a circuit?

Voltage only

Frequency only

Current, resistance, and time

To get more heating in a wire, you should increase:

Only current

Current, resistance, and time

Only length of wire

To strengthen the magnetic field of a coil, you should:

Remove the core

Increase current, number of turns, and use an iron core

Decrease current

Why is an insulating coating important on wires?

Prevents electric shocks and short circuits

It absorbs heat

It lowers resistance

What is a magnet produced by electric current called?

An electromagnet

A permanent magnet

A bar magnet

Which device/effect is used in loudspeakers to move the diaphragm?

Chemical effect

Heating effect only

Magnetic effect of current

The unit of electric current is what?

Ohm (Ω)

Ampere (A)

Volt (V)

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Electricity: Magnetic & Heating Effects

Froggy Jumps

Sobre esta actividad

Creada por

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Electricity: Magnetic & Heating EffectsVersión en línea

por Hamsa Lekha

What happens when electric current passes through a conductor?

Which device demonstrates the magnetic effect of current to lift objects?

The heating effect of electric current is most useful in which appliance?

Which factors affect heating effect in a circuit?

To get more heating in a wire, you should increase:

To strengthen the magnetic field of a coil, you should:

Why is an insulating coating important on wires?

What is a magnet produced by electric current called?

Which device/effect is used in loudspeakers to move the diaphragm?

The unit of electric current is what?

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