Question

Plzzzz help me solve the first and second question...

Answer 1

(1)

we know that

potential will be added when cells are connected in series

so, the polarity must be same

positive of one cell must be connected to negative of another cell

we can see only one option

option-(i)......Answer

(2)

(A)

we know that

`R=(V)/(I)`

so, smaller value of I means larger value of R

so,

`R_3>R_2>R_1`

option-3.....Answer

(B)

we know that

maximum resistances can be obtained when resistors are connected in series

so,

`R=R_1+R_2+R_3+R_4+R_5`

`R=(1)/(5)+(1)/(5)+(1)/(5)+(1)/(5)+(1)/(5)`

`R=1`

so, option-4........Answer

(C)

we know that series combination

we add resistances

so, we will get largest value of equivalent resistance

so, option-2..........Answer