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Write any two characteristics of an elec...

Write any two characteristics of an electromagnetic wave. Why are microwaves used in radar systems?

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XII BOARDS PREVIOUS YEAR-QUESTION PAPER 2023-Question
  1. Two small conducting balls A and B of radius r1 and r2 have charges q1...

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  2. What is a displacement current ? How is it different from a conduction...

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  3. Write any two characteristics of an electromagnetic wave. Why are micr...

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  4. (a) Draw a plot showing the variation of potential energy of a pair of...

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  5. A current carrying circular loop and a straigbt wire bent partly in th...

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  6. (i) In diffraction due to a single slit, the phase difference between ...

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  7. (i)In a Young's double-slit experiment SS2-SS1=lambda/4,where S1 and S...

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  8. A resistor of 30 ohm and a capacitor of 250/pi muF are connected in se...

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  9. A Series LCR circuit with R = 20 ohm,L=2H and C=50muF is connected to ...

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  10. A rectangular conductor MNPQ with a movable arm MN (resistance r) is k...

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  11. (i) Define mobility of electrons. Give its SI units. (ii) A steady cur...

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  12. (i) Define electrical conductivity of a wire. Give its SI unit. (ii) H...

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  13. (i) Explain the working principle of an optical fibre with the help of...

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  14. Electrostatics deals with the study of forces, fields and potentials a...

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  15. Electrostatics deals with the study of forces, fields and potentials a...

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  16. Electrostatics deals with the study of forces, fields and potentials a...

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  17. The lens maker's formula is useful to design lenses of desired focal l...

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  18. The lens maker's formula is useful to design lenses of desired focal l...

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  19. The lens maker's formula is useful to design lenses of desired focal l...

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  20. The lens maker's formula is useful to design lenses of desired focal l...

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