DC Circuit MCQ Job Interview Exam Higher Study Admission Questions Answers part4
1.Four cell, each of internal resistance 1 Ω, are connected in parallel. The battery resistance will be 0.25 Ω.
2.The current in a coil of resistance 90 Ω is to be reduced by 90%. What value of resistance should be connected in parallel with it? 10 Ω.
3.In order to get maximum current in series-parallel grouping of cells, the external resistance should be equal to the total internal resistance of the battery.
4.Two equal resistance are connected in series across a certain supply. If the resistances are now connected in parallel, the power produced will become four times.
5. Voltmeters V1 and V2 are connected in series across a d.c. line. The voltmeter V1 reads 80 V and has per volt resistance of 200 Ω while V2 has a total resistance of 32 kΩ. The line voltage is 240 V.
6. A wire has a resistance of 6 Ω. It is bent in the form of an equilateral triangle. The effective resistance between any two corners of the triangle is 4/3 Ω.
7. Two similar cells whether joined in series or in parallel have the same current through an external resistance of 2 Ω. The internal resistance of each cell is 2 Ω.
8.When resistance are connected in parallel, the current divides itself in inverse ratio of resistances.
1.Four cell, each of internal resistance 1 Ω, are connected in parallel. The battery resistance will be 0.25 Ω.
2.The current in a coil of resistance 90 Ω is to be reduced by 90%. What value of resistance should be connected in parallel with it? 10 Ω.
3.In order to get maximum current in series-parallel grouping of cells, the external resistance should be equal to the total internal resistance of the battery.
4.Two equal resistance are connected in series across a certain supply. If the resistances are now connected in parallel, the power produced will become four times.
5. Voltmeters V1 and V2 are connected in series across a d.c. line. The voltmeter V1 reads 80 V and has per volt resistance of 200 Ω while V2 has a total resistance of 32 kΩ. The line voltage is 240 V.
6. A wire has a resistance of 6 Ω. It is bent in the form of an equilateral triangle. The effective resistance between any two corners of the triangle is 4/3 Ω.
7. Two similar cells whether joined in series or in parallel have the same current through an external resistance of 2 Ω. The internal resistance of each cell is 2 Ω.
8.When resistance are connected in parallel, the current divides itself in inverse ratio of resistances.
9.When a d.c. battery of e.m.f E and internal resistance r delivers maximum power to an external resistance R, the ratio r/R is 1:1.
10. Two bulbs rated at 25 W, 110 V and 100 W, 110 V are connected in series to a 220 V supply. What will happen to the circuit? 25 W bulb will burn out.
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