Physics question and answers for November 21, 2023
- Q The r m s value of current from t 0 to t 3 s for the curren i 3t A is 2 A 1 45 A hr min 4 A
- Q Given an RLC series circuit with inductance of 0 25 henries resistance of 20 ohms capacitance of 1 300 farads and an electromotive force of 8e t volts determine the...
- Q 4 An inductance of 3 0 mH has a voltage that is described as follows for 0 1 2 ms V 15 0 V and for 2 t 4 ms...
- Q 7 An AC voltage source described by V 10 cos 2 t is connected to a 1 F capacitor as show figure The key K is closed at t 0...
- Q 19 In the circuit shown in figure V V VV and V are ideal ac voltmeters The column I gives a condition and the column II gives the match the...
- Q When a and 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 the...
- Q Phy Section B This section contains 15 SINGLE CORRECT TYPE questions Out of these 15 questions candidate A charged capacitor of capacity 30 F is connected to 27 mH inductor...
- Q 3 LEN Which of the following combinations should be 23 selected for better tuning of an L C R circuit used for communication 1 R 152 L 3 5 H...
- Q 35 The charge on the d Q d12 by equation of LC oscillation oscillat 1 2 x Hz 2 2 Hz 4 4 x Hz 36 Switch is in position...
- Q c An LCR series ac circuit is at resonance with 10 V each across L C and R If the resistance is halved the respective voltages across L C and...
- Q Please deduce the equation Nce rt Pg 258 A m a a a b Replace each parameter in the above equation by the corresponding electrical quantity and see what happens...
- Q A uniformly wound solenoid coil of self inductance 1 8 10 H and resistance 62 is broken up into two identical coils These identical coils are then connected in parallel...
- Q a What do you understand by cut off frequency in relation to a parallel R L C resonant circuit Explain with respect to its current response Why is it called...
- Q The r m s value of current for one time period in the above diagram which is plotted between i and t is A 4 2 0 4 10 s...
- Q 6 a A three phase 400 V 50 Hz a c supply is feeding a three phase delta connected load with each phase having a resistance of 25 ohms an...
- Q 6 b A star connected balanced load is supplied from a 3 phase balanced supply with a line voltage of 416 V at a frequency of 50 Hz Each phase...
- Q If there were two transformers one of high rating and one of low rating say one is of 50KV and one is of 5KV then how can we share the...
- Q 3 In an ac circuit the applied voltage and the current flowing are E 110 sinnt and respectively What is the power consumed in the circuit 11 sin nt 3...
- Q 1 At angular frequency 10 rad s the nature of circuit b Capacitive a Inductive c Resistive d M 2 Same current is flowing in two alternating circuits The first...
- Q For the shown AC circuit answer the following question Xc 492 HH www R 30 mm X 89 V 100sin 100 t volt Q Current drawn from the source as...
- Q r Anp njunction D shown in the figure can act as a rectifier An alternating current source V is connected in the circuit The current I in the resistor R...
- Q 0 A choke coil and capacitor are connected in series and the current through the combination is maximum for AC of frequency n If they are connected in parallel at...
- Q 26 A condenser of capacity 20 F is first charged and then discharged through a 10 mH inductor Neglecting the resistance of the coil the frequency of the resulting vibrations...
- Q hoke coil and pure resistance are connected in series across 230V 50HZ AC supply If the voltage drop across the coil is 190V and a resistance is 80V while the...
- Q An ideal DC source of emf E is connected with an uncharged capacitor and inductor If switch is closed at t 0 what is the maximum charge on the capacitor...
- Q The output voltage taken across the resistance of a L C R series resonant circuit falls to half its peak value at a frequency of 200 Hz and again reaches...
- Q CO1 1 TCON 2 SBUF 3 TMOD 4 PSW 5 PCON i contains status information ii timer counter control register iii idle bit power down bit iv serial data buffer...
- Q 23 Show that voltage and current are in phase with each other when an AC voltage is applied across a resistor Represent this relation in phasor diagram 24 Derive the...
- Q 14 An inductor and a resistor are connected in series across A C supply Which of the following phasor NCERT Pg 239 diagram may be correct 1 3 2 1...
- Q 3 The phase shift in the electric and magnetic fields in an EM wave is given by which parameter a phase constant b attenuation constant c propagation constant intuingia impodance
- Q For the network shown below R 2 Q R 4 5 Q R 40 XL 30 Xc 3 5 Q R E 100 V 20 z F R a Calculate...
- Q A capacitor of capacitance 1 F is charged to a potential of 1 V It is inductance 10 3 H The maximum current that will flow in the circuit has...
- Q In a series LCR circuit L 10 H C 160 uF and R 80 Q The value of angular frequencies for which the power is half of its maximum value...
- Q An a c generator consists of a coil of 1000 turns and cross sectional area of 3m rotating at a constant angular speed of 60 rad s1 in a uniform...
- Q Graph shows voltage V and current 1 against time for an AC circuit where all elements will be in series Circuit may contain V I uestion Type Single Correct Type...
- Q For the AC circuit shown in figure select the correct alternative s 1 2 X 30 mmm 4 R 40 www wwwwww R 50 V V sin ot 1 and...
- Q 5 Paragraph for Questions 5 and 6 The circuit consists of a capacitor connected in parallel to a resistor R with a coil of inductance L in series with them...
- Q An inductance has a high resistance to AC and low to DC When a DC voltage source having some AC component superimposed on it sends current through an inductance to...
- Q 5 2 The potential difference and the current i flowing through an instrument in an AC circuit of frequency f are given as V cos oot volts and i 2sinot...
- Q rough 5 7 The ratio of secondary to the primary turns in a transformer is 5 If the power output be P the input power neglecting all pated losses must...
- Q 5 An inductor L a capacitor C and ammeters A A2 and A3 are connected to an oscillator in the circuit as shown in the adjoining figure When the frequency...
- Q Case Study Read the following paragraph and answers the questions Resonant Series LCR Circuit When the frequency of ac supply is such that the inductive reactance and capacitive reactance become...
- Q Question J If potential difference across a resistor of 80 2 varies as shown in the graph below average power consumed by the resistor is Y a b c d...
- Q Consider the following statements w r t LCR circuit Statement A Instantaneous values of voltage across various components of series LCR circuit follows Kirchoff s voltage law Statement B RMS...
- Q W r t voltage for the phase of current in ac circuits match the following a Purely resistive circuit I b Purely inductive circuit ii o c Purely capacitive circuit...
- Q For a purely inductive circuit having inductor of inductance 50 mH and an ac source of 220 V if frequency of source is 50 Hz the rms current is nearly...
- Q In a series LCR circuit L 2 H R 10 Q C 32 F If the voltage of ac source in given by V 300 sin 100nt then at t...
- Q current through the circuit immediately after closing the switch Column l Column II A B C R S 2 R Q R 2R 9 Q R p P Q R...
- Q In a series LCR circuit the variation of peak current im with angular frequency w is shown for two cases with different resistances R and R R Then is ac...
- Q The phasor diagram shown below represents cot Purely inductive circuit Purely resistive circuit Purely capacitive circuit LCR circuit
- Q In order to have a better selectivity for a device operating on LCR circuit it is possible that O Inductance is high Band width is low Resistance is low min...
- Q In a series LCR circuit the resonance frequency wo is 1 x 106 rad s the resistance R is 2000 and the inductance is 1 mH then the value of...
- Q The LC oscillations appears to be unrealistic and undergo damping effect due to Resistance of inductor min sec Energy radiation as as electromagnetic waves Both 1 2
- Q Consider the circuit shown below having a capacitor of capacitance C and a resistance R connected to a source of voltage Vand angular frequency w then current in circuit Xc...
- Q In a series LC circuit performing LC oscillation the quantities that oscillate are Energy of inductor Polarity of capacitor Capacitance min se Both 1 8 2
- Q A charged capacitor having charge Q and capacitance Cis connected to inductor of inductance L as shown If the charge at any instant on capacitor is reduced to half of...
- Q 3 Derive the average value and RMS value of a cosinusoidal signal Also find its peak factor and form factor 4 I have a RLC load connected in series with...
- Q Consider an electric circuit consisting of a coil of negligibly small inductance consisting of N 10 turns and with the surfac area of a single loop S 10 cm resistors...
- Q 4 Points Consider a circuit in which a coil having inductance of 0 02H and resistance of 50 connected across 200V 50Hz supply in series with a resistance of 50...
- Q Q 1 In a campus a building is carrying three phase 440V 50Hz ac supply and carrying some electrical equipments for working on a machine In a room there is...
- Q Q 11 In an industry an engineer is designing a dc shunt machine which behaves as a motor He is connected an armature resistance of 0 030 and shunt resistance...
- Q 0 5 points Save Answ The capacitor in the circuit shown is initially charged to Q Qo At t Othe switch is connected to position a At t to the...
- Q Draw the diagram for self inductance and mutual inductance and express how can we get coefficient of coupling
- Q ASSAGE A student is performing on 220 v dc shunt motor in which he uses an armature resistance of 0 22 ohm and field resistance of 110 ohm At no...
- Q A student is working on 3 phase 50 Hz 4 pole induction motor having slip 5 Then selecting the value of slip determine following Calculate the rotor frequency at standstill...
- Q PASSAGE In de shunt motor if the supply voltage is 400 volt armature resistance is 0 5 ohm and armature current at no load is 5A and at full load...
- Q Initially there is no current in the inductors and capacitor is charged to a potential difference Vo Then the maximum energy stored in the inductor L after the switch is...
- Q 5 In an AC circuit the emf e and the current I at any instant are given respectively by e Eo sin ct I Io sin t o The average...
- Q Q 3 A three phase 440V 50Hz ac supply is given on a machine in which there is a 6 pole and its slip is to found be 0 03...
- Q 4 I have a RLC load connected in series with an alternating voltage source Will the circuit behave as resistive or inductive or capacitive Explain with proper phasor diagrams urront...
- Q In an L C circuit shown in the figure C 1F L 4H At time t 0 charge in the capacitor is 4C and it is decreasing at a rate...
- Q Q 13 In any plant an engineer is designing a dc shunt motor in which an armature resistance of 0 060 and shunt resistance of 1150 have been connected When...
- Q For the circult shown below E 30 V L 36 mH and R350 After steady state is reached with S closed and S open S is closed and immediately thereafter...
- Q Q1 A non inductive resistor is connected in series with a capacitor of 100 F capacitance across 200 V 50 Hz mains The p d measured across the resistor is...
- Q 2 In a series RC circuit a resistance and capacitance are connected in series in such a manner it takes 220V ac supply The values of resistance and capacitance are...
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