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प्रश्न
Name a common device that uses electromagnets.
उत्तर
Electromagnets are used in electric bell, door alarm, motor, dynamo etc.
संबंधित प्रश्न
What is an electromagnet? Describe the construction and working of an electromagnet with the help of a labelled diagram.
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Electromagnetic induction means ______.
Complete the following diagram of a transformer and name the parts labeled A and B. Name the part you have drawn to complete the diagram . What is the material of this part? In this transformer a step-up or step-down? Why?
Name the following diagram and explain the concept behind it.
State the purpose of soft iron core used in making an electromagnet.
List some of the practical applications of an electromagnet.
A 50 cm long solenoid has 400 turns per cm. The diameter of the solenoid is 0.04 m. Find the magnetic flux linked with each turn when it carries a current of 1 A.
A generator has an e.m.f. of 440 Volt and internal resistance of 4000 hm. Its terminals are connected to a load of 4000 ohm. The voltage across the load is ______.
