Question

pls help me.I have pasted the picture.pls don't write short answers.pls
explain it.

Answer 1

Explanation:

a) least count of these metre means

for mA

least count= value of the metre/no.of metre

=>least count= 250/15=50/3

b) resistance of the resistor

as we know by ohm's law

v=IR, => 2.4=250(R)

=>R=2.4/250

=>R=6/625