Related InterviewSolutions

• In the above question, the resistance between the square faces isA. `3 xx 10^(-9)Omega`B. `3 xx 10^(-7)Omega`C. `3 xx 10^(-5)Omega`D. `3 xx 10^(-3)Omega`
• Two resistance `R_(1)` and `R_(2)` are made of different material. The temperature coefficient of the material of `R_(1)` is `alpha` and of the material of `R_(2)` is `-beta`. Then resistance of the series combination of `R_(1)` and `R_(2)` will not change with temperature, if `R_(1)//R_(2)` will not change with temperature if `R_(1)//R_(2)` equalsA. `alpha/beta`B. `(alpha+beta)/(alpha-beta)`C. `(alpha^(2) + beta^(2))/(alphabeta)`D. `beta/alpha`
• An ionization chamber with parallel conducting plates as anode and cathode has `5 xx 10^(7)` electrons and the same number of singly-charged positive ions per `cm^(2)`. The electrons are moving at `0.4 m//s`. The current density from anode to cathodes `4 mu A//m^(2)`. The velocity of positive ions moving towards cathode isA. `0.4m//s`B. `16m//s`C. ZeroD. `0.1m//s`
• The total current supplied to the circuit by the battery is A. 1AB. 2AC. 4AD. 6A
• In the circuit as shown if the current drawn through battery is `0.5A`. Then A. Resistance R = `46Omega`B. Current through `20Omega` resistance is 0.1AC. Potential difference across the middle resistance is 2VD. Potential difference across the `20Omega` resistance is 4V
• Thirteen resistances each of resistance `R` ohm are connected in the circuit as shown in the figure below. The effective resistance between `A` and `B` is A. `2ROmega`B. `4R/3Omega`C. `2R/3Omega`D. `Romega`
• Current through XY of circuit shown is A. 1AB. 4AC. 2A from B to AD. 3A
• If each resistance in the figure is of `9Omega` then reading of ammeter is
• A current `I` is passing through a wire having two sections `P` and `O` of uniform diameters `d` and `d//2` respectively. If the mean drift velocity of electrons in section `P` and `Q` is denoted by `v_(P)` and `v_(Q)` respectively, thenA. `v_(P) = v_(Q)`B. `v_(P) = 1/2v_(Q)`C. `v_(p) = (1/4)v_(Q)`D. `v_(P) = 2v_(Q)`
• Two cells, having the same emf, are connected in series through an external resistance `R`. Cells have internal resistance `r_(1)` and `r_(2) (r_(1) gt r_(2))` respectively. When the circuit is closed, the potentail difference across the first cell is zero the value of `R` isA. `r_(1) + r_(2)`B. `r_(1) - r_(2)`C. `(r_(1) + r_(2))/2`D. `(r-(1)-r_(2))/2`