Question

two identical wires are first connected in series and then in parallel to a source of supply and then parallel to a source of supply find the ratio of the heat produced in two cases​

Answer 1

$\bold \pink{question}$

Two identical wires are first connected in series and then in parallel to a source of supply. Find the ratio of the heat produced in two cases.

$\bold \red{answer}$

$\green{✫} \orange{let \: the \: resistance \: of \: two \: wires} \\ \orange{be \: the \: x \: and \: x}$

$\bold \green{when \: they \: get \: connected \: in} \\ \bold \green{series \: then \: the \: effective} \\ \bold \green{resistance \: is \: \: = \frac{x \times x}{x + x} \: = \: \frac{x}{2}}$

$\bold \purple{by \: joules \: law \: } \\ \bold \purple{h \: is \: proportional \: to \: x}$

$\bold \blue{therefore \: the \: ratio \: = \: \frac{2x}{x \: by \: 2}}$

$\bold \blue{ = \: 4:1}$