A 10 V battery is connected to two resistors, 5 Ω and 20 Ω, joined in parallel through an ideal ammeter.
(i) Calculate the initial reading of the ammeter.
(ii) If the 20 Ω branch is now disconnected (open circuited) while the 5 Ω branch remains, what will be the new ammeter reading? State whether the current increases or decreases and why.
a. (i) initial reading of the ammeter
b. (ii) new ammeter reading after the 20 Ω branch is disconnected and the reason