Electricity: Magnetic and Heating Effects — Flashcards
CBSE · Class 8 · Science
76 flashcards for Electricity: Magnetic and Heating Effects (CBSE Class 8 Science) to test yourself on key terms and facts.
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What happens when electric current flows through a conductor?
Answer
It produces a magnetic field around the conductor. This is called the magnetic effect of electric current. The effect stops when the current stops.
जब किसी चालक में विद्युत धारा प्रवाहित होती है तो क्या होता है?
Answer
यह चालक के चारों ओर एक चुम्बकीय क्षेत्र उत्पन्न करता है। इसे विद्युत धारा का चुम्बकीय प्रभाव कहते हैं। धारा के रुकने पर यह प्रभाव रुक जाता है।…
Why does a compass needle deflect near a current-carrying wire?
Answer
A current-carrying wire produces a magnetic field. The compass needle is a tiny magnet, so it turns when the magnetic field acts on it.
धारा-वाहक तार के पास कम्पास की सुई क्यों विचलित होती है?
Answer
विद्युत धारा ले जाने वाला तार एक चुम्बकीय क्षेत्र उत्पन्न करता है। कम्पास की सुई एक छोटा सा चुम्बक होता है, इसलिए जब चुम्बकीय क्षेत्र उस पर कार्य करता है तो वह घूम जाती है।…
What is a magnetic field?
Answer
The region around a magnet or a current-carrying wire where magnetic effect can be felt is called a magnetic field.
चुम्बकीय क्षेत्र क्या होता है?
Answer
चुंबक या विद्युत धारा ले जाने वाले तार के आसपास का क्षेत्र जहाँ चुम्बकीय प्रभाव महसूस किया जा सकता है, उसे चुम्बकीय क्षेत्र कहते हैं।…
Who discovered the link between electricity and magnetism in 1820?
Answer
Hans Christian Oersted discovered that electric current produces a magnetic field. He noticed a compass needle deflect when a circuit was opened or closed.
1820 में बिजली और चुंबकत्व के बीच संबंध की खोज किसने की थी?
Answer
हंस क्रिश्चियन ओर्स्टेड ने खोजा कि विद्युत धारा एक चुम्बकीय क्षेत्र पैदा करती है। उन्होंने देखा कि जब एक परिपथ खोला या बंद किया जाता है तो एक कम्पास सुई विचलित होती है।…
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
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