Find out the work done by non conservative forces during

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Q1. An 11.90 V battery is connected to a series circuit containing a 6ohm resistor and a 2.30 H inductor. The circuit is established and current is 1.9833 A. How long will it take the current to reach 50 percent of its final value? Answer in units of s

Q2. A pendulum has the length of 50cm and a bob of mass of 20g. It is pulled to the side by 20 degrees and released. The energy is calculated with a choice of Ug=0 at the bottom of the swing. After many swings, the energy has decreased by 10%. Find out the work done by non conservative forces during this time.

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