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Separated them ? Explain with the help of figure.28. What should be the position of the object,when a concave mirror is to beused as a) shaving mirror and b) in torches producing parallel beam of light?Draw suitable diagram for the above cases,29. Draw a circuit diagram consisting of a battery of three cells of 2V each, a 5ohm, 8 ohm, 10 ohm and 12 ohm resistor, ammeter and a plug key,allconnected in series. Calculate total current and potential difference across &ohm resistor.30. Derive an expression for effective resistance of four resistors connected inseries.SECTION C5 MARK QUESTIONS31. Describe double circulation in humans? Why is this type of double circulationis necessary in humans. 4/6​

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