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PHYSICS NOTES - CH - 6 - MAGNETISM - UNIT 2 - Properties and Uses of Magnets (Ana NOTES)
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Formal Notes: Magnetism- UNIT - 2 - Properties and uses of Magnets. Q1 (a) You are provided with a 15 cm long steel strip. By using a permanent magnet, explain how you will magnetise the steel strip. Ans: Take the thin steel strip about 15 cm long. Mark one side as 'A' and the other one as 'B'. Place the strip AB along one edge of the table. Rub the magnet along the strip from till point B. Lift the magnet and place it again on point A rubbing it along till point B. Repeat this 40 times. And the steel strip will get converted into a magnet. (b) How will you verify the magnetic poles formed on the steel strip? Ans: Bring the end A of the strip to the north pole of a freely pivoted magnetic needle. The north pole of a freely suspended magnetic needle is repelled, which proves that end A of the steel strip changed into North pole of a magnet and hence end B becomes South pole. (c) Suggest a simple way of demagnetization of above steel strip? Ans: If we hammer the ...
PHYSICS NOTES - CH - 6 - MAGNETISM - UNIT 1 - NATURAL AND ARTIFICIAL MAGNETS (ADHVEY's NOTES)
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Formal Notes: Magnetism Unit 1 - Natural and Artificial Magnets. Answer the following questions: Q1 (a) What is a magnet? Ans: Magnet: A magnet is a substance which has a property of attracting other magnetic substances such as iron, steel, nickel and cobalt, and when freely suspended always points in north south direction. Q1 (b) What is a natural magnet? Name the chemical formula of it. Ans: Natural Magnet: A material which occurs naturally and has magnetic properties is called natural magnet. Magnetite ( Fe3O4 ) is a naturally occuring magnet. Q2 (a) What are artificial magnets? Ans: Artificial Magnet: A substance to which properties of a natural magnet is imparted by artificial means is called an artificial magnet. Q2 (b) Draw neat diagrams of four different shapes of artificial magnets. Ans. Q3. Why are artificial magnets preferred over natural magnets? Ans: Reasons for using artificial magnets:- (i) They can be made very powerful which is not possible in the case of natural ma...
PHYSICS NOTES - PINHOLE CAMERA - Q2 - Q3
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Q.2 (a) What is principle of pinhole camera? (b) Briefly describe the construction and working of a pinhole camera. Draw a diagram in support of your answer. Ans. (a) Principle of Pinhole Camera: It is based on the principle that light travels in straight lines i.e. Rectilinear Propagation of Light. Ans. (b) Construction of Pinhole Camera: It consists of a rectangular cardboard box, such that one is made out of ground glass screen. The side opposite to the ground glass screen has a hole in the middle, whose size is equal to the pinhead of a common pin. The box is blackened from inside so as to absorb any light which falls on its walls directly or indirectly. Working of Pinhole Camera: Consider a candle AB in front of the pinhole camera. The rays starting from different points of candle, travel in all directions. A ray of light starting from point A along AH, after passing through pinhole falls on the ground glass screen at point A1. Similarly, another ray starting from point B a...
PHYSICS NOTES - PIN HOLE CAMERA
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Pinhole Camera 1) Aim: To prove that light travels in a straight line. Materials required: Three stiff cardboards, three wooden blocks, a sharp pin, geometry box, adhesive tape, candle, and matchbox. Procedure: Place the cardboard one upon another. On the topmost cardboard, draw diagonals as shown in fig. 5.11(a). Make a hole with the help of a sharp pin at the point of intersection of diagonals through all the cardboards. Observation: If you [align the holes], you can see the light will perfectly pass through the cardboards. But when you move one of the cardboards, the light does not pass through. Conclusion: Light can only travel in straight lines.
KANNADA NOTES LN 14 KELADI CHENNAMMA
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ಪಾಠ - ೧೪ ವೀರರಾಣಿ ಕೆಳದಿ ಚೆನ್ನಮ್ಮ One word sentences (ಒಂದು ವಾಕ್ಯದ ಉತ್ತರಗಳು) Q1) ಚೆನ್ನಮ್ಮ ಎಲ್ಲಿ ಆಳುತ್ತಿದ್ದಳು? Ans: ಚೆನ್ನಮ್ಮ ಕೆಳದಿಯಲ್ಲಿ ಆಳುತ್ತಿದ್ದಳು. Q2) ರಾಜಾರಾಮನು ಯಾರ ಮಗ? Ans: ರಾಜಾರಾಮನು ಛತ್ರಪತಿ ಶಿವಾಜಿಯ ಮಗ. Q3) ಸಂಭಾಜಿಯನ್ನು ಸೆರೆ ಹಿಡಿದು ಕೊಲ್ಲಿಸಿದವನು ಯಾರು? Ans: ಸಂಭಾಜಿಯನ್ನು ಸೆರೆ ಹಿಡಿದು ಕೊಲ್ಲಿಸಿದವನು ಮೊಗಲರ ಸುಲ್ತಾನ ಔರಂಗಜೇಬ. Q4) ರಾಜಾರಾಮನಿಗೆ ಯಾರೂ ರಕ್ಷಣೆ ನೀಡಲಿಲ್ಲ ಏಕೆ? Ans: ಔರಂಗಜೇಬನಿಗೆ ಹೆದರಿ ರಾಜಾರಾಮನಿಗೆ ಯಾರೂ ರಕ್ಷಣೆ ನೀಡಲಿಲ್ಲ. Q5) ಔರಂಗಜೇಬ ಏಕೆ ಕೋಪಗೊಂಡನು? Ans: ರಾಜಾರಾಮನಿಗೆ ಆಶ್ರಯ ನೀಡಿದ್ದರಿಂದ ಔರಂಗಜೇಬ ಕೋಪಗೊಂಡನು. Q6) ಸಿದ್ಧಪ್ಪ ಶೆಟ್ಟರು ಸಭೆಯ ತೀರ್ಮಾನ ಏನೆಂದು ಹೇಳಿದರು? Ans: ಸಿದ್ಧಪ್ಪ ಶೆಟ್ಟರು "ಶರಣು ಬಂದವರಿಗೆ ಆಶ್ರಯ ನೀಡುವುದು ನಮ್ಮ ಧರ್ಮ. ದುಷ್ಟನಿಗೆ ಹೆದರಿ ಹಿಂದೆ ಸರಿಯುವುದಕ್ಕಿಂತ ಮುಂದುವರೆದು ಹೋರಾಡುವುದೇ ಲೇಸು" ಎಂದು ಸಭೆಯ ತೀರ್ಮಾನ ಹೇಳಿದರು. Long Answers (ದೀರ್ಘ ಉತ್ತರಗಳು) 1) ರಾಜಾರಾಮನು ರಾಣಿ ಚೆನ್ನಮ್ಮನಿಗೆ ಸಭೆಯಲ್ಲಿ ಏನೆಂದು ಕೇಳಿಕೊಂಡನು? Ans: ರಾಜಾರಾಮನು ರಾಣಿ ಚೆನ್ನಮ್ಮನಿಗೆ ಸಭೆಯಲ್ಲಿ ಔರಂಗಜೇಬನು ತನ್ನ ಸಹೋದರ ಸಂಭಾಜಿಯನ್ನು ಕೊಂದು ತನ್ನನ್ನು ಕೊಲ್ಲಲು ಪ್ರಯತ್ನಿಸುತ್ತಿರುವುದಾಗಿ, ಆತನಿಗೆ ಹೆದರಿ ತನಗೆ ಯಾರೂ ಆಶ್ರಯ ...