Physics question and answers for November 19, 2023
- Q A uniformly wound solenoid having an inductance L and resistance R is cut into two identical halves and the two halves are connected parallel The combination is now connected to...
- Q 7 Henry in an alternating current circuit are connected to 220 volt A C mains in series The power dissipated in the circuit will be 1 1210 watt 3 440...
- Q 1 0 V 2 5 V 3 10 V 4 V When an alternating voltage of 220 V is applied across a device P a current of 0 25 A...
- Q In the circuit shown in the figure K is open The charge on capacitor C in steady state is 9 Now key is closed and at steady state charge on...
- Q An Ac circuit contains two identical resistances and two identical capacitors connected as shown in the figure 1000 R 9 and C 10 F If not where is the phase...
- Q For the shown AC ircuit List 1 contains Va VAI and phase difference between AC voltage source and Vc in degree Corresponding values In S I unit are given in...
- Q For the shown AC circuit List l contains Vc VR I and phase difference between AC voltage source and Vc in degree Corresponding values In S I unit are given...
- Q R y CO IL120 R 1 vooroo www 2 ashss A St sblatio trw bo soymloy bus Totais 3 do In the above circuit C F R 2002 L 2...
- Q Which of the following is are correct for alternating current circuit C R www mooooooo L In LCR series circuit current through Rat resonance is maximum In the series LCR...
- Q In an A C circuit the instantaneous values of e m f and current are given by E 100 sin 200t volt and I 2 sin 200t Ampere The average...
- Q In a circuit current changes with time according to 2 t rms value of current between t 2 s to t 4s will be O 3 A 3 3 A...
- Q If a direct current of value a ampere is superimposed on an alternating current I b sin ot flowing through a wire what is the effective rms value of the...
- Q Choose the correct answer Consider a series LR circuit with a switch shown in figure If the switch S is closed down t 0 then the magnitude of change in...
- Q Figure shows an ac circuit The rms voltage of the source is Vrms The rms current through the source when Note Do not consider radiation and other such behaviour at...
- Q The capacitor in the figure below is designed to filter low frequency signals impeding their transmission between circuits Circuit Signal Circuit 2 a What capacitance is needed to produce a...
- Q 40 The power factor of the circuit shown in the figure 1 is The reactance of capacitance of the 2 circuit is 4sin 2001 1 30 2 3 40 2...
- Q Figure shows two circuits in each case V denotes peak value of input voltage Input voltage is given by V V sinot and output voltage by V V sin at...
- Q Using the A Y or Y A conversion determine the total impedance for the networks in figure E 60 V 0 a b C d 12 96 Q 267 13...
- Q nsider a series LR circuit with a switch as shown in figure If the switch S is closed down at t 0 then the magnitude of change in flux ough...
- Q sider a series LR circul a switch as shown in figure If the switch 3 is closed down at 1 0 then the magnitude of change in nux ugh the...
- Q 60 500 W In the power triangle shown the reactive power is a 1000 VAR lagging O b 1000 VAR leading O c 866 VAR leading O d 866 VAR...
- Q 5 The virtual current of 10 A and 100 Hz flows in an AC circuit containing a coil The power consumed in the coil is 1000 watt If the virtual...
- Q A series RLC circuit has the following values 10 e 50 V rms at R 20 XL 400 rad s Current 2 A leads the applied voltage The value of...
- Q When 100 V D C flows in a solenoid the current is 1 0 A When 100 V A C flows the current drops to 0 5 A If the...
- Q An inductive coil has a resistance of 100 when an A C source of frequency 1000 Hz is applied across the coil The applied voltage leads the current by 45...
- Q It is found that the current in the circuit is 0 50 A with D C source and 0 40 A with A C sources The voltage E for D...
- Q A resistance of 10 2 an inductance of 2 henry and a capacitor of F are connected in series with mains line of 110 V and 50 Hz The phase...
- Q An A C voltage of r m s value 0 1 V is applied to an LCR series circuit in which L 100 H and C 4 x 108 F...
- Q The r m s value of an A C of 50 Hz is 10 A The time taken by the alternating current in reaching from zero to maximum value and...
- Q An alternating e m f of 100 V rms is applied to a series LCR circuit At resonance the potential difference across the inductance and across the capacitance is 400...
- Q The impedence of a series LCR circuit varies with 4 frequency of applied voltage source as below ZA 32 Zo 0 o Identify the correct option 1 At current lags...
- Q R A solenoid of inductance L and resistance is connected in parallel to a resistance R 2 An ideal battery of emf E is connected across the parallel combination as...
- Q Question No 42 Phy Section B This section contains 15 SINGLE CORRECT TYPE questions Out of these 15 questions candidate can choose to attempt any 10 questions A galvanometer has...
- Q 3 8 KR T T 4 10m KR T T 0 Power dissipation through a resistor when an a source is connected is P If an inductor X 2 2R...
- Q 33 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 If instead C...
- Q 26 A series LCR circuit containing a resistance of 120 2 has angular resonance frequency 19 diri tellud ori 4 x 105rad s At resonance the voltage Srl to mais...
- Q 8 A transformer has a primary coil with 1600 turns and a secondary coil with 1200 turns If the current in the primary coil is 6 Ampere then what is...
- Q 5 A transformer is used to convert O Mechanical energy into electrical energy Electrical energy into mechanical energy High or low voltage d c into low or high voltage d...
- Q A coil has a resistance of 40 and an inductance of 9 55mH connected to a 240V 50 Hz upply Calculate 5 1 The inductive reactance 2 The impedance 3...
- Q Revisit An AC supply of 230 volt is applied to a half wave rectifier circuit Find I Output DC voltage il Rectification efficiency 2 marks CO4 Choose the best option...
- Q An inductor 4H and a resistance 50 are connected in series with an A C source At a particular instant voltage across inductor is 3 volt and across resistor is...
- Q Figure a shows plot of voltage across the capacitor as a function of the driving frequency for a sinusoidally driven electromagnetic oscillator LCR circuit Figure b shows phase angle phase...
- Q A series RLC circuit is activated by a frequency o variable ac source of voltage V volt as shown in the circuit VRL and V are the potential drops across...
- Q In the following circuit the AC source is an ideal voltage source What is the amplitude of the steady state current through the inductor at resonance A 0 C Vo...
- Q 4 Resonance in series LCR circuit is also used in tuning mechanism of TV sets Which of the following combinations should be selected for better tuning of an L C...
- Q b A 200 50V 50 Hz single phase transformer is connected to a 200V 50 Hz supply with secondary winding open 1 What is the value of maximum flux through...
- Q Specimen Numerical A coil of inductance 1 H and negligible resistance is connected to a 120 V mains supply Find the current flowing in the circuit if the frequency of...
- Q 54 In an ac circuit the applied voltage and the current flowing are E 110sin n t and I 11 sin nt n 3 respectively What is the power consumed...
- Q 53 In an AC circuit consisting of a capacitor and a bulb how will the brightness of the bulb change if a dielectric is introduced between the plates of the...
- Q 13 In a series RLC circuit the r m s voltage across the resistor and the inductor are respectively 400 V and 700 V If the equation for the applied...
- Q 1 he applied potential difference in the circuit shown is V 10 sin100t where Vis in volt and t is in second If the power factor of the circuit is...
- Q A coil and a bulb are connected in series with a de source A soft iron core is then inserted in the coil hen Intensity of the bulb remains the...
- Q In the circuit shown after sufficiently long time in position 1 of the switch so that current is steady in the circuit the switch is moved over to position 2...
- Q A resistance and a capacitor are connected to an ac source If the resistance increases then the average bpower liberated in the resistance Pick the most appropriate answer 1 Will...
- Q The current I in an A C circuit with inductance coil varies with time according to the graph given below t Which one of the following graphs gives the variation...
- Q A pure inductor of inductance 0 7 H is connected in series with a resistance of 220 Q If an alternating emf of 440 V 50 Hz is applied to...
- Q Two metal spheres of radius R are placed at a very large distance from each other and they are connected by a coil of inductance L as it is shown...
- Q 2 Alternating current of peak value TC flows through the primary coil of the coefficient of mutual A 100 V C 300 V ampere transformer The inductance between primary and...
- Q A capacitor stores 10 C charge when connected across a battery When the gap between the plates is filled with a dielectric a charge of 20 C flows through the...
- Q Two similar bulbs of rating 100W 50 2 V are connected in circuit as shown when frequency of source is varied brightness of B changes It is observed that a...
- Q A 10 0 mL solution of 0 050 M AgNO was titrated with 0 0250 M NaBr in the cell S C E titration solution Ag s Find the cell...
- Q In this circuit given the value of R option L C iv Current through the source is A only iii and iv are correct R ww Consider the following statements...
- Q alternating voltage sources 7 as shown in the figure where o and corresponds to 30 and 3 127 respectively Find the peak current in Amp through the resistor connected across...
- Q For shown circuit XL 250 m RO 250V X 750 HH A Current in circuit is 10A B Voltage across inductor is 100V C Voltage across capacitor is 200V D...
- Q In the given L C R circuit the value of rms current through the a c source is L 000000 A C rms 2 R OL 0 1 C Vrms...
- Q 9 A diode whose internal resistance is 20 2 is to supply power to a 1000 2 load from a 230 V rms source of supply Calculate a the peak...
- Q questions from the codes a b c and d given below A Both A and R are true and R is the correct explanation of A B Both A and...
- Q 1 A series R C circuit is connected across a source of emf V 100 2 sin 1000t where R 10009 and C 1 F The equation of current in...
- Q 3 In the following circuit rms current through inductor is 0 8 A the rms current through capacitor is 0 4 A and rms current through resistor is 0 3...
- Q 14 In the given A C circuit the through inductor and capacitor are 0 8 A and 0 4 A respectively The instantaneous current through resistor is 1 1 2...
- Q NCERT Pg 245 1 For resonance the presence of both L and C elements in the circuit is must in LCR series circuit AC circuit 2 The power factor in...
- Q In the circuit shown in the figure the switch is initially at position 1 for a long time Now at t 0 the switch is turned to position 2 Initially...
- Q A current of 2 A is flowing at 220 V in the primary coil of a transformer If current in the secondary coil is 1 A and efficiency of the...
- Q If the current in the primary coil is reduced from 3 A to zero in 10 second then the induced e m f in the secondary is 15 x 103...
- Q An LC circuit consists of a capacitor and a coil with a large number of turns Suppose all the lim dimensions of all elements of the circuit are increased by...
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