In the circuit diagram shown, each battery is ideal having an e.m.f. of $1\ volt$. Each resistor has a resistance of $1\Omega $ Ammotor$(A)$ has a resistance of $1\Omega $ Find the reading of the ammeter and the total thermal power produced in the circuit
Diffcult
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$(1)$ Reading of ammeter $=1$ $\mathrm{amp}$
$(2)$ Thermal energy, $P=I^{2} R$
$ P =3^{2} \times 1+2^{2} \times 1+2^{2} \times 1+2^{2} \times 1+1^{2} \times 1 $
$=9+4+4+4+1 $
$=22 \text { Watt. } $
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