Question

please answer the 28th question

Answer 1

answer of question no 1 will be V=IR so I=0.25 and R is 4 so V=0.25*4=1.0
answer of question no 2 will be V=IR so I=0.25 and R is 3 so V=0.25*3=0.75
answer of question no 3 will be V=IR so I=0.25 and R is 2 so V=0.25*2=0.50 and since R and 2 resistor are in series so p.d. of both resistor is 0.50
answer of question no 4 will be R=V/I so I=0.25 and V=0.50 so R=0.50/0.25=2