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2. On what sum of money does the S.I. for 10 years at 5% become RS. 1,600 ?

5. In how many years will RS.870 amount to RS.1,044, the rate of interest being 2-1/2% p.a. ?

9. In 4 years, RS.6,000 amounts to RS.8,000. In what time will RS.525 amount to RS.700 at the same rate ?

11. What sum of money lent out at 5% for 3 years will produce the same Interest as RS.900 lent out at 4% for 5 years ?

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Galvanometer Working and Numerical

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CHAPTER 10 magnetic field due to electric current class 12 SOLUTIONS MAHARASHTRA BOARD

CHK https://www.youtube.com/playlist?list=PL1PT16gwuU0Mk1vIH92dY6Z6IxjfS5aRk

Q12. A circular coil of wire is made up of 100 turns, each of radius 8.0 cm. If a current of 0.40 A passes through it, what be the magnetic field at the centre of the coil? DONE

Q3. Calculate the value of magnetic field at a distance of 2 cm from a very long straight wire carrying a current of 5 A

Q9.Magnetic field at a distance 2.4 cm from a long straight wire is 16 µT. What must be current through the wire?

Q11. A circular loop of radius 9.7 cm carries a current 2.3 A. Obtain the magnitude of the magnetic field (a) at the centre of the loop and (b) at a distance of 9.7 cm from the centre of the loon but on the axis. DONE

Q8. Current of equal magnitude flows through two long parallel wires having separation of 1.35 cm. If the force per unit length on each of the wires in 4.76 x 10-2 N, what must be I ? DONE

Q7.A very long straight wire carries a current 5.2 A. What is the magnitude of the magnetic field at a distance 3.1 cm from the wire? DONE

Q2.A piece of straight wire has mass 20 g and length 1 m. It is to be levitated using a current of 1 A flowing through it and a perpendicular magnetic field B in a horizontal direction. What must be the magnetic of B?

DONE