Related InterviewSolutions

• The massses of the three wires of copper are in the ratio 1 : 3 : 5. And their lengths are in th ratio 5 : 3 : 1. the ratio of their electrical resistance isA. `1:03:05`B. `5:03:01`C. `1 : 15 : 125`D. `125 : 15 : 1`
• In the circuit shown in figure find: a. the current in the `3.00 Omega` resistor,b. the unknown emfs`E_1` and `E_2` and c the resistance `R`.
• A single battery is connected to three resistances as shown in fig. 5.316 A. The current through `7Omega` resistance is 4AB. The current through`3 Omega`resistance is 4A.C. The current through `6 Omega` resistance is 4A.D. The current through `7Omega` resistance is 0.
• For the batteries shown in fig. `R_1, R_2 and R_3` are the internal resistance of `E_1, E_2, and E_3,` respectively Then, which of the following is / are correct? A. The equivalent internal resistance R of the system is given by `(R_1R_2R_3)//(R_1R_2 +R_2R_3+R_3R_1).`B. If `E_3 = (E_1R_2 +E_2R_1)//(R_1+R_2),` the equivalent emf of the batteries will be equal to `E_3`C. The equivalent emf to the battery is equal to `E = (E_1 +E_2 +E_3)//3`D. The equivalent emf of the battery not only depends upon values of `E_1,E_2, and E_3` but also depends upon values of `R_1, R_2 and R_3.`
• In charging singe loop R - C circuit, after how many time constant, kthe potential energy in the capacitor will be 25% of its maximum value.
• How many time constant will elapse before the power delivrered by the battery drops to half of its maximum value.
• If 0.6 mol of electorns flows throutgh a wire in 45 min, what are (a) the total charges that passes through the wire and (b) the magnitude of the current?
• The current through the `8Omega` resistor (shown in fig.) is A. 4AB. 2AC. zeroD. 2.5A
• In the network shown in fig. , the potential differene across A and B is A. 6VB. zeroC. 2VD. 4V
• The voltage-current variations of two metallic wire X and Y at constant temperature is shown in fig Assumign that the wires have the same length and the same diameter, explain which of the two wires will have larger resisitivity.