2, \'n ,he circuit all meters are idealized and the battery has an internal resi

Question

2, 'n ,he circuit all meters are idealized and the battery has an internal resistances r = 0.5 (a)tind the reading of the voltmeter . and ammeter with the switch S open (b) With the switch closed, find the reading of the voltmeter , and ammeter·which way up or down does the current flow through the switch? (C) Find rate of dissipation of energy in the battery (d) Find rate of conversion chemical energy to electrical (e) Find a rate of conversion electrical energy to thermal energy all over the circuit. Evaluate your solution

Explanation / Answer

I = E/(R+r) = 25/100.5 = 0.248 A

So Ammeter reading = 0.248 A (ans)

Voltmeter reading = E - ir = 25-0.248*0.5 = 24.876 V (ans)

Rate of dissipation of energy in the battery = i^2r = 0.015 W (ans)

Rate of conversion of chemical energy = Ei = 25*0.248 = 6.2 W (ans)

rate of conversion of chemical energy to thermal energy all over the circuit = 6.2-0.015 = 6.185 W (ans)

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