Get premium membership and access revision papers with marking schemes, video lessons and live classes.
Processing. Please wait.

 Form 3 Physics: Heating Effect of an Electric Current Questions and Answers

A Current I flowing through a wire of resistance R was increased seven times. Determine the factor by which the power was increased.

 (2m 7s)
775 Views     SHARE

Download as pdf file

Answer Text:
#P =I^2 R#
#I = 7I#
#P= (7I)^2R#
#P = 49I^2 R#
Power will be 49 times the initial power.