For the circuit shown in the figure (Figure 1) a 20.0 Ω resistor is embedded in a large block of ice at 0.00∘C, and the battery has negligible internal resistance.

At what rate (in g/s) is this circuit melting the ice? (The latent heat of fusion for ice is 3.34×105J/kg.)

rate of melting of ice is given as

Explanation:

As we know that 20 ohm , 10 ohm and 20 ohm resistor is in parallel with each other

so the equivalent of the all three is given as

so we have

now total resistance of whole circuit is given as

now current flowing in the circuit is given as

now current in 20 ohm resistor is given as

now we know that power dissipated across the resistor is used to melt the ice

so we have

so in required units it is