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An electro-magnet can be turned on and off.
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∙ 13y ago
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What are facts about load shedding?
Load shedding is what happens when electric companies deliberately cut some of their customers' power off to reduce the demand on the system. The result is sometimes called rolling blackouts, as the area cut off from power is often switched from one part of the grid to another. It is a way of managing extreme demands on power that the power company is unable to satisfy.
After world war 2 the us switched from a manufacturing economy to a what kind of economy?
industrial
What twelve countries switched from their currency to the Euro currency in 2002?
Italia was one of dem.
What was one effect of the switch to farming?
One effect was that it switched peoples daily program and that caused a lot of conflict
How much is 100 lire in us dollars?
Italy hasn't used lira since 2002 when they switched to the euro. At that time 100 lira was worth about 7 US cents.
Is a horseshoe electromagnet bar magnet or a magnet pole a example of a temporary magnet?
An electromagnet is temporary because the field disappears when the current is switched off.
Whyb are natural magnets noy used in cranes to lift heavy loads?
The electro-magnet can be switched on and pick up metal. Then the electro-magnet can be switched off and the metal will be released. A natural magnet would not release the metal.
What are two advantages of a natural magnet over electromagnet?
A natural magnet is permanent - an electromagnet loses its power when it's switched off.
What is a magnet created using electric current?
An electromagnet. Unlike other magnets it can be switched on and off.
A magnet can be switch on and off?
An electromagnet can - for example in scrapyards where a crane picks up a car with power on, then drops it when power switched off.
What type of material is used for making temporary magnet?
An electo-magnet has an iron core wrapped round with wire coils. When electricity is passed through the coils, the iron core become magnetised, until the electricity is switched off.
how does an electromagnetic crane works?
The electromagnetic crane has a huge electric magnet that is operated by an electrical current. When the electricity is switched on the magnet becomes magnetized for allowing metal objects to be picked up just like an ordinary magnet, but when electricity is turned off the metal object fall away.
What are the benefits of using an electromagnet rather than a bar manet?
An electro-magnet can be switched on & off - a bar magnet is 'permanent' Think of a scrap-yard. If the magnet they use to pick up huge quantities of metal were permanent, they'd have to manually remove every piece. With an electro-magnet, they simply turn the power on to pick up a load, and off when they want to release it. You can make your own electro-magnet with a battery, some wire and a large nail.
Why is a electromagnet not a permanent magnet?
An electromagnet only retains major magnetic properties when a current is being run through it.AnswerWhether a material makes a permanent or temporary magnet depends on the nature of the ferromagnetic material involved. For example a coil with a steel core will retain much of its magnetic flux density when the current is switched off, whereas a coil with an iron core will lose most of its magnetic flux density when the current is switched off.
Change into active voice-the light was switched off?
Someone switched off the light.
How does a electromagetc crane work?
electromagnetic crane has a huge electic magnet instaed of a hook. this magnet is operated by an electrical current. when electric is switched on the magnet becomes magnetized,allowing metal objects to be picked up just like an ordinary magnet.when elctric is turned off the metal object will fall away, as it is no longer magnetized.
Which one is correct sentence Her mobile is currently switched-off or her mobile is currently switch-off?
switched-off i believe
