Question

A torch bulb is rated 2.5V and 750mA so calculate it's power

Answer 1

$Voltage = 2.5 V\\Current = 750 \ mA = 750 \times 10^{-3} = 0.75 A\\\\ We \ know,\\Power = voltage \times current\\~~~~~~~~~~= 2.5 \times 0.75\\~~~~~~~~~~=1.875 \ Watts$