To calculate the total heat emitted when two stove plates are connected in series or parallel, we need additional information. Specifically, we would need to know the individual heat emitted by each stove plate in each configuration.
Let's assume that the heat emitted by each stove plate remains the same regardless of the configuration. In that case:
a) If the two stove plates are connected in series, the current passing through both plates is the same. In a series circuit, the total voltage is divided between the components. Since power is the product of voltage and current, and power is proportional to heat emitted, the total heat emitted by two stove plates in series would still be 1000 J.
b) If the two stove plates are connected in parallel, the voltage across both plates is the same. In a parallel circuit, the current is divided between the components. Assuming an equal split of the current, each stove plate would receive half of the current. Therefore, each stove plate would emit 500 J of heat, resulting in a total of 1000 J for both plates combined.
It's important to note that these calculations assume that the heat emitted is directly proportional to the energy supplied. In reality, there may be variations due to factors like efficiency, losses, or other considerations specific to the stove plates.