Find the minimum number of cells required to produce an electric current of 1.5 A through a resistance of `30 Omega`. Given that the emf of each cell is 1.5 V and internal resistance `1.0 Omega`.
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If `y_(1)=max||z-omega|-|z-omega^(2)||`, where `|z|=2` and `y_(2)=max||z-omega|-|z-omega^(2)||`, where `|z|=(1)/(2)` and `omega` and `omega^(2)` are c
Correct Answer - C `(c )` We have `||z_(1)|-|z_(2)|| le |z_(1)-z_(2)|` and equality holds only when `argz_(1)=argz_(2)` `implies||z-w|-|z-w^(2)|| le |w^(2)-w| le sqrt(3)` and equality canhold only when `|z|=2` and not when...
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A battery of emf 6V internal resistance 5`Omega` is joined in parallel with another cell of emf of 10V and internal resistance `1Omega` and the combin
Correct Answer - `6/11 A through 6-V battery in opposition to its emf and `(1)3/11` A through 10-V battery in direction of the emf
2 Answers 1 views
A cell having an emf of 2 V and internal resistance of `0.5 Omega` is sending current through a tangent galvanometer of resistance `4.5 Omega`. If ano
Correct Answer - 0.02 A
2 Answers 1 views
A metre bridge wire of resistance 3 `Omega` is connected to a cell of emf 2 V and internal rsistance 1 `Omega` Claculate the p.d cm of the wire What l
Correct Answer - 0.015V//cm,full length of it
2 Answers 1 views
The resistance of two conductors in series is `18 Omega` and the resistance becomes `4 Omega` when connected in parallel. Find the resistance of indiv
Correct Answer - `12 Omega, 6 Omega`
2 Answers 1 views
A battery of emf 2 V and internal resistance `0.5 Omega` is connected across a resistance of `9.5 Omega`. How many electrons pass through a cross-sect
Correct Answer - `1.25xx10^(18)`
2 Answers 1 views
10 cells, each of internal resistance `0.5 Omega` and 1.2 V emf are connected (a) all in series and (b) all in paralle. Calculate the current sent in
Correct Answer - `2.69 A, 1.41 A`
2 Answers 1 views
A 20 V battery of internal resistance `1 Omega` is connected to three coils of `12 Omega, 6 Omega` and `4 Omega` in parallel, a resistor of `5Omega` a
Correct Answer - `1.2 A, 0.2 A, 0.4 A, 0.6 A, 18.8 V, 10.4 V`
2 Answers 1 views
How would you arrange 64 similar cells each having an emf of 2.0 V and internal resistance `2 Omega` so as to send maximum current through an external
Correct Answer - `n=16, m=4,2.0 A`
2 Answers 6 views
100 cells each of emf 5 V and internal resistance 1 Ω are to be arranged so as to produce maximum current
Correct answer is (A) 2
2 Answers 1 views