In an a.c. circuit, the instantaneous e.m.f. and current are given by e = 100 sin 30 t i = 20 sin (30 t− π/4 ) In one cycle of a.c., the average power consumed by the circuit and the wattless current are, respectively :

October 28, 2020
Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

A coil has an inductance of 0.7 H and is joined in series with a resistance of 220 Ω . When an alternating e.m.f. of 220V at 50 c.p.s. is applied to it, then the wattless component of the current in the circuit is

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An ideal choke takes a current of 8A when connected to an a.c. source of 100 volt and 50Hz. A pure resistor under the same conditions takes a current of 10A. If two are connected in series to an a.c. supply of 100V and 40Hz, then the current in the series combination of above resistor and inductor is

Three identical cells, each having an e.m.f. of 1.5 V and a constant internal resistance of 2.0Ω, are connected in series with a 4.0 Ω resistance R, first as in circuit (1), and second as in circuit (ii). what is the ratio Power in R in circuit (ii)/Power in R in circuit (i) ?

Question Answers

In an a.c. circuit, the instantaneous e.m.f. and current are given by e = 100 sin 30 t i = 20 sin (30 t− π/4 ) In one cycle of a.c., the average power consumed by the circuit and the wattless current are, respectively :

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A coil has an inductance of 0.7 H and is joined in series with a resistance of 220 Ω . When an alternating e.m.f. of 220V at 50 c.p.s. is applied to it, then the wattless component of the current in the circuit is

Three identical cells, each having an e.m.f. of 1.5 V and a constant internal resistance of 2.0Ω, are connected in series with a 4.0 Ω resistance R, first as in circuit (1), and second as in circuit (ii). what is the ratio Power in R in circuit (ii)/Power in R in circuit (i) ?

Question Answers

In an a.c. circuit, the instantaneous e.m.f. and current are given by e = 100 sin 30 t i = 20 sin (30 t− π/4 ) In one cycle of a.c., the average power consumed by the circuit and the wattless current are, respectively :

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A coil has an inductance of 0.7 H and is joined in series with a resistance of 220 Ω . When an alternating e.m.f. of 220V at 50 c.p.s. is applied to it, then the wattless component of the current in the circuit is

Three identical cells, each having an e.m.f. of 1.5 V and a constant internal resistance of 2.0Ω, are connected in series with a 4.0 Ω resistance R, first as in circuit (1), and second as in circuit (ii). what is the ratio Power in R in circuit (ii)/Power in R in circuit (i) ​ ?

Three identical cells, each having an e.m.f. of 1.5 V and a constant internal resistance of 2.0Ω, are connected in series with a 4.0 Ω resistance R, first as in circuit (1), and second as in circuit (ii). what is the ratio Power in R in circuit (ii)/Power in R in circuit (i) ?