Physics question and answers for November 20, 2023
- Q A transformer has Np 30 turns in primary and N 2500 turns in the secondary If the input voltage is V 200Sin wt then the r m s voltage across...
- Q If current consider the following ac circuit from the source is plotted against frequency of voltage source the graph is best respected by 2 3 Wo R 0
- Q onsider the L R C circuit with L 1 H R 40 C 1 4000 F and t 24 V Determine the current in this circuit if there is zero...
- Q In a series L C R circuit the values of L and C are so adjusted that the maximum current flows through the circuit In this case if the P...
- Q In an A C circuit a resistance R 400 and an inductance L are connected in series If the phase angle between voltage and current is 45 then the value...
- Q mateva to sornstala on bsoubor viss In the series LCR circuit as shown in figure the heat developed in 80 seconds and amplitude of wattless current is factor A 4000...
- Q Figure shows three oscillating LC circuit with identical inductors and capacitors If t t2 t3 are the time periods of the circuits I II and III then e 1 HH...
- Q Which of the following curves correctly represents the variation of capacitive reactance Xc with frequency f Xc Xc Xc Xc
- Q For an L R circuit in which current is growing the time constant is equal to L RUR Ay MH ug d cst ad chimich A Twice the ratio of...
- Q 16 1 10 2 N m 3 10 0 N m 2 10 11 N m 4 10 N m A series R L C circuit is shown here The...
- Q A circuit when connected to an AC source of 12 V gives a current of 0 2 A The same circuit when connected to a DC source of 12 V...
- Q If in an A C circuit capacitance C is initially decreased by 20 and then increased by 20 then what will be effect on resonance frequency Ans increased by 2
- Q Previous Years Questions A series LCR circuit is connected to an ac voltage source When L is removed from the circuit the phase difference between current and voltage is T...
- Q A resistance of 300 22 and an inductance of A henry are connected in series to an ac voltage of 20 volts and 200 Hz frequency The phase angle between...
- Q Figure shows LC circuit with two inductor and two capacitors The current in circuit is given by 1 12 5 sin 2t faat dan LC 1 12 sin 2t L...
- Q A EMF of Variable Value of Current T Passing through the coil during time I is 1 VOT 2 VOT 4 Coil of inductance L and is connected to V...
- Q When a and B rays are subjected to a magnetic field which is perpendicular to the direction of their motion with their same speed The curvature of path of both...
- Q 15 A bulb connected in series with a solenoid is lit by an AC source If a soft iron core is introduced in the solenoid then 1 Point the bulb...
- Q 7 A step down transformer reduces the voltage of a transmission line from 2200 V to 220 V The power delivered by it is 880 W and its efficiency is...
- Q the for A C Phase difference Voltage is I when only switch S is and Phase difference shown in figh between current and Closed S in Closed both the Switches...
- Q In an LCR series AC circuit voltage across resistance is 2 volt The inductive and capacitive reactances are 100 and 50 respectively The phase difference between voltage across the circuit...
- Q D A 4000 resistor in series with a 0 1H inductor and 0 5 uf capacitor is connected across a 240V ac supply of frequency 50Hz Calculate the impedance of...
- Q 06 The phase difference between current and voltage when the frequency of applied e m f is 00 w is R 2L resonance frequency in a series LCR circuit is...
- Q C A transformer has a primary i What sort of transformer is it il Calculate the turn ratio 1 mark 1 mark it If the primary coll is connected to...
- Q C A resistance of 15 Q is connected in series with an inductance of 0 25 hen across 220v 50Hz ac supply calculate the D ii iv V vi VII...
- Q Which of the following figures give the correct variation of the magnitude of output voltage as a function of the frequency v does not change with frequency NCERT Vt a...
- Q Three impedances are connected in series and energized by a 1 phase ac supply The impedances comprise of i a resistance of 50 and inductance of 25 mH i a...
- Q 3 0 5 m s 4 50 m s In an LCR series ac circuit the voltage across each of the components L C and R is 60V then the...
- Q mpedance is a measure of the opposition to the flow of alternating electrical current It consists of two parts called resistance and reactance Impedance Z in ohms 2 can be...
- Q Part II QUANTITATIVE PROBLEMS 30 points each MUST show your work to receive credit A correct final answer without steps is not acceptable and will result in no credit Partial...
- Q 4 In an R L C series circuit R 300 Q2 L 0 400 H and C 6 00 10 operates at the resonance frequency of the circuit the current...
- Q 2 A series RLC circuit has a peak current of 1 6 A with a frequency of 6 0 kHz If the resistance of the circuit is 18 kn the...
- Q A 115 F capacitor whose initial charge is 3 91 x 10 coulomb is placed in series with a 2000 2 resistor and a switch as shown When the switch...
- Q In the study of alternating electric current instantaneous voltage is modeled by the equation e Emax sin 2aft where f is the number of cycles per second Emax is the...
- Q a Old incandescent lightbulbs have a purely resistive metal filament through which flows an alternating current If an incandescent bulb uses an average power of 75 0 W when connected...
- Q 3 A three phase three wire ABC system with an effective line voltage of 106 1 V has a balanced connected load with impedances of Z 15L 30 Q Obtain...
- Q Consider the circuit in Eigure 1 Assume that L 200 0 mH Figure S ww R 60 0 V R eeee L 1 of 1 125 50 Submit Part D...
- Q Consider the circuit in Figure 1 Assume that L 200 0 mH Figure S R 60 0 V R Meele L 1 of 1 Part A Just after the switch...
- Q 35 5 V battery with negligible internal resistance 55 02 resistor and a 1 45 mH inductor with egligible resistance are all connected in series with an open switch The...
- Q AC voltage V t 20 sin 2t of frequency 50 Hz is applied to a parallel plate capacitor The separation on between the plates is 2 mm and the area...
- Q 56 Two solenoids of equal number of turns have their lengths and the radii in the same ratio 1 2 The ratio of their self inductances will be Kerala CEE...
- Q Q5 22 July 2021 Shift 1 mathongemathonge mathango Arathongo In a circuit consisting of a capacitance and a generator with alternating emf Eg Eg sin wt Vc and I are...
- Q Q2 20 July 2021 Shift 1 In an LCR series circuit an inductor 30mH and a resistor 1n are connected to an AC source of angular 3 frequency 300rad s...
- Q 38 Ac CCIO Sv Find the PD across R 38 Find the impedance of the given circuit for 1702 2002 www For 20 F HH Ans 4 V w i...
- Q 8 An LR circuit consists of R 40 2 and inductance of 3 H An AC voltage 200 V and frequency 10T 50 Hz is applied to the circuit The...
- Q 38 Ac v Find the PD across R 38 Find the impedance of the given circuit for Timang och 2002 Far 20 F wwth Ans 4 V Apar no w...
- Q A copper disc of diameter 36 cm rotates with its plane at right angles to a uniform magnetic field of induction 20 Wb m at the e m f induced...
- Q An alternating e m f of peak value 110V and frequency 50 hz is connected across LCR series circuit with R 1000 L 10mH and C 25 uF Calculate the...
- Q 40 cm and the size of image is twice as that of object then the object distance is 2 20 cm 4 30 cm 1 60 cm 3 40 cm...
- Q Ans 0 55 H 32 A coil has a current of 1 0 A and a power of 100 W from an AC source of 110 V and 50 Hz...
- Q Hint P I R Ans 100 2 0 146 H 33 A sinusoidal voltage V 200 sin 314 t is applied to a resistor Find i rms voltage ii rms...
- Q An inductor x 292 a capacitor xc 892 and a resistance 892 is connected in series with an A C source The voltage output of A C source is given...
- Q The graph shows current v s voltage in a series RLC A C circuit The arrow indicates the direction that this curve is drawn as tim progresses In this plot...
- Q 50 A resistor R 300 Q and a capacitor C 25 f are connected in series with a 50 V Hz T AC source The average power dissipated in the...
- Q 1 Induction furnace 3 Speedometer of automobile The power consumed in the circuit is 1 1 kW 3 3 kW 4 Crystallography 2 2 kW 4 4 kW R 100...
- Q For the given circuit current through the inductor is 0 9 ampere while the current through the capacitor is 0 6 ampere and current through the resistor is 0 4...
- Q what does source mean Choose the incorrect statement s 1 Dimensional formula of impedance is ML T A 2 Quality factor of a circuit for an AC source is unitless...
- Q 4 An inductor L 8 45 mH a capacitor C 250 F and a resistor R 10 0 2 are connected in series to ar ac voltage source with a...
- Q 1 0 8 2 0 4 3 1 25 4 0 125 33 The phase difference between the alternating current an emf is n 2 Which of the following cannot...
- Q The value of C if circuit becomes resonant after closing the key is 1 OL 3 L L voooooo V V sinot C 2 w C C 4 K 2...
- Q 7 An R L C circuit containing a 5292 resistor a 230 mH inductor and a 8 8 F capacitor is driven by an A C voltage source that has...
- Q A capacitor of capacitance C is charged to potential and is connected in circuit as LC switch S is 6 shown in the figure Switch S is closed at r...
- Q In an oscillatory LC circuit Qo is the charge on the capacitor of capacitance C when the magnetic field linked with the inductor of inductance L is zero Analyse the...
- Q For the ac circuit shown in the figure R 100 kQ and C 10 pF the phase difference between Vin and Vout is 90 at the input signal frequency of...
- Q A sinusoidal voltage Av 75 0 V sin 200t is applied to a series RLC circuit with L 70 0 mH C 155 0 F and R 42 0 0...
- Q In the given AC circuit applied voltage V 10 sin wt the capacitive reactance is 2 5 Q the inductive reactance is 1 25 Q the resistance of resistor is...
- Q A transformer has an input of 240 V to its primary coil of 150 windings a If the secondary coil has only 25 windings what type of transformer is it...
- Q The output voltage taken across the resistance of a LCR series resonant circuit falls to half its peak value at a frequency of 200 Hz and again reaches the same...
- Q ung of a resistance of 4 92 and inductive reactance of 3 02 Find actor in the circuit 22015 7 44 A 5 A 100 V ac circuit with frequency...
- Q A box P and a coil Q are connected in series with an AC source of variable frequency The EMF of source is constant at 10V Box P contains a...
- Q In the circuit shown below the key K is closed at t 0 The current through the battery is VR R V V A at t 0 and at t...
- Q 7 A radio is tuned to station in the 30 MHz to 54 MHz What is corresponding wavelength band NCERT Pg 281 1 AM band 2 FM band 3 Short...
- Q 15 Consider a series LCR circuit in which reactance each and resistance are 100 When the circuit is connected to ac source 220 V 50 Hz then current drawn from...
- Q t s Fioned What should Breaks down x 2 5 1 kV e is at x 0 atrio both a E b BAAN the initial currents through each resistor after...
- Q An ac supply is connected across a series LCR circuit If capacitor is removed then which of the following phasor diagram may be correct NCERT Pg 245 fee 1 3...
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