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Published on: 27/05/2021
QB365 Provides the HOT Question Papers for Class 12 Physics, and also provide the detail solution for each and every HOT Questions. HOT Questions will help to get more idea about question pattern in every exams and also will help to get more marks in Exams
Download CBSE Class 12th Standard CBSE Physics question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 12th Standard CBSE Physics
Questions + Answers key
Take MCQ Physics Test1.
How does the self-inductance of an air-core coil change, when
(i) the number of turns in the coil is decreased,
(ii) an iron rod is introduced in the coil? A copper coil L wound on a soft iron core and a lamp B are connected to a battery E through a tapping key K when the key is suddenly opened, the lamp flashes for an instant to much greater brightness. Explain
2.
Two coils are being moved out of magnetic field- one coil is moved rapidly and the other slowly. In which case is more work done and why?
3.
A train is moving with uniform speed from North and South, why will any induced emf appear across the ends of its axle?
1.
(i) Decreases
(ii) Increases There is an opposition for the current in coil due to self induction so the bulb gets more electric current initially
2.
The One Which is moved Rapidly
3.
As the train is intercepting vertical components of the earth's magnetic field.The flux linked with the changes.So, there will be an induced emf.
12th Standard CBSE Syllabus & Materials
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