Question

.Any expert here to answer this with sol.
Don't make tukka/guess​

Answer 1

Answer:

hi there!!!

Explanation:

happy helping ❤️

refer to the picture....Pls ask one question at a time...it is difficult for people to answer.

I am answering qn 42.

Answer 2

Yo

41. Effective resistance of parallel combination is given by

1/R=1/R1+1/R2

R=R1*R2/R1+R2

assuming all dimensions are same we get

$\alpha = ( \alpha 1 \times \alpha 2) \div (\alpha 1 + \alpha 2)$

ie option 4

here

$\alpha = resisitivity \: of \: material$

42. Use the formula

N=No*e^(-kt)

where k is the decay constant

equate Na/Nb=1/e and apply the above formula

and will get your answer as option 3

Hope this helps