2) a). The resistivity of a wire varies with its length area of cross-section mass material...

2) a). The resistivity of a wire varies with its

length
area of cross-section
mass
material

b) Given the units of a physical quantity. Choose the correct relation (J is for Joule, V is for volt, C is for Coulomb)

A) J = CV

B) J = VA

C) J = C/A

D) V = J C

c) A charge of 3 C moving in a uniform electric field experiences a force 3000 N. The potential difference between two points situated in the field at a distance 1 cm from each other will be

A) 10 V

B) 90 V

C) 1000 V

D) 9000 V

d) Choose the only incorrect relation:

A) ampere = coulomb/second

B) volt = coulomb/joule

C) ohm = volt/ampere

D) coulomb = Joule/volt

e) In an astronomical telescope, the image formed by the objective is I₀ and that formed by eye piece is I_e . Then

A) I₀ and I_e are both real

B) I₀ and I_e are both virtual

C) I₀ is virtual and I_e is real

D) I₀ is real and I_e is virtual

Solutions

Expert Solution

As it is not mentioned that how many questions has to be attempted. Therefore I have done the first four question as per instructions given to us. Kindly consider it please as this is our protocol if many questions are posted without mentioning that how many of them have to be attempted.

=>If your doubt is cleared please give an upvote it means a lot. Its a humble request to you. If you have any doubts feel free to ask in comment section.

genius_generous answered 1 year ago

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