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  1. The depth at which the effective value of acceleration due to gravity is g/4
  2. The area of cross-section of one limb of an U-tube is twice that of the other.
  3. The resistance of a bulb filament is 100 Ω at a temperature of 100⁰C.
  4. Two identical capacitors each of capacitance 5 mF are charged potentials 2 kV and 1 kV
  5. A car sounding a horn of frequency 100 Hz passes an observer. The ratio