9 os End
bilo
b) A battery of unknown emf is connected across resistances, as shown in fig below. The voltage
drop across the 8ohms resistor is 20V. What will be the current reading in the ammeter? What is the ammeter?what is the emf of the battery?
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When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)