Question

Section D-4 score each
71 Resistance of a 230 V heating device is 460 ohm
(a) What is the current flowing through the devke.
b) Calculate the heat energy produced by in 10 minutes
Id How much is the quantity of charge that flows through the device in 10 minutes?​

Answer 1

Given : V = 230v ; resistance( R ) = 460 Ω

(a) current flowing through device ( i ) = ( V / R )

⇒ i = ( 230 / 460 ) = 0.5 amp.

(b) heat energy generated ( Q )= i²Rt

⇒ Q = 0.5² x 460 x 10

⇒ Q  = 1150 J.

(c) we know , i =  ( dq / dt )

⇒ dq = i x dt

⇒ ∫dq = ∫ i x dt

⇒ q = i x t║₀¹⁰

⇒ q = 0.5 x ( 10 - 0 )

⇒ q = 5 columb.

HOPE THIS HELPS YOU !!