Physics question and answers for November 16, 2023
- Q An ac generator has a frequency of 2 2 kHz and a voltage of 240 V An inductance L 5 0 mH is connected across its terminals Then a second...
- Q In the network given the switch is closed at t 0 s Determine the time constant 7 voltage across the inductor v and current it at t O s 4...
- Q An ideal resistance R ideal inductance L ideal capacitance C and AC volt meters V V2 V3 and V4 are connected to an AC source as shown At resonance A...
- Q D 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...
- Q In a series LCR circuit the voltage across R is 100 V and R 1 k2 C 2 F The resonant angular frequency w is 200 rad s 1 Lis...
- Q The switch in the circuit shown shifts from 1 to 2 when 2V Vc 3 V and goes back to 1 from 2 when Vc 3 This process is repeated...
- Q how much energy is dissipated as heat A coil of inductance 0 50 H and resistance 1000 is connected to a 240 V 50 Hz ac supply What is the...
- Q A single phase 22 kVA 2200 V 220 V 50 Hz distribution transformer is to be connected as an auto transformer to get an output voltage of 2420 V Its...
- Q 6 For the source free parallel RLC circuit R 60 L 7H and C 0 023F Calculate the damping constant and natural frequency Is the natural response overdamped underdamped or...
- Q A coil of inductive reactance 1 30 and resistance 1 is connected to 200V 50Hz A C supply The time lag between maximum voltage and current is A B C...
- Q 2 An alternating current generator has an internal resistance R and an internal reactance X It is used to supply power to a passive load consisting of a resistance R...
- Q 3 Assertion Series LCR circuit is a voltage magnifier Reason In series LCR circuit at resonance voltage drop across inductance or capacitance is Q quality factor times the applied voltage
- Q When a voltage measuring device is connected to AC mains the meter shows the steady input voltage of 220 V This means a Input voltage cannot be AC voltage but...
- Q 13 Assertion At resonance the inductive reactance is equal and opposite to the capacitive reactance Reason In series LCR circuit the inductive reactance is equal and opposite to the capacitive...
- Q Q9 a What do you understand by Q factor in series LCR circuit b Explain how it depends the values of L C R c For better selectivity a series...
- Q 36 00 20 B A 12 resistor and a 0 21 H inductor are connected in series to an a c source operating at 20 v 50 cycles second The...
- Q A capacitor consists of two metal plates each 500 x 500 mm and spaced 6 mm apart The space between the metal plates is filled with a glass plate of...
- Q 2 F 8 F A capacitor of 2uF is charged as shown in the diagram When the switch S is turned to position 2 the percentage of its stored energy...
- Q View In English A small metallic ball is charged positively and negatively in a sinusoidal manner at a frequency of 108 cps The maximum charge on the ball is 108...
- Q Q 84 Two conducting sphere of radius R are placed at a large distance from each other They are connected by a coil of inductance L as shown in the...
- Q 5 A battery is charged at a potential of 15 V for 8 hours when the current flowing is 10 A The battery on discharge supplies a current of 5...
- Q 3 In the circuit shown below the Zener diode is used to regulate the voltage across the load R 500 22 For an unregulated power supply V of 12 V...
- Q A zener diode is operating in its normal region i e the breakdown region for which the circuit diagram is as shown in the figure ET B A R www...
- Q What is the time constant for a series RC circuit hooked up to and emf of V when the resistance is given to be 73 kn and the capacitance is...
- Q An electric lamp which runs at 80 V DC consumes 10 A current The lamp is connected to 100 V 50 Hz ac source compute the inductance of the choke...
- Q In an ac circuit the readings of ammeter and voltmeter are 10 A and 25 V respectively Power in the circuit will be O More than 250 W Always less...
- Q At a moment t 0 when the charge on capacitor C is zero the switch is closed If lo be the current through inductor at t 0 for t 0...
- Q Two coils A and B are connected in series with a supply of 240V 50Hz A s resistance is 5 ohm and B s inductance is 0 02 H the...
- Q ampere d 5 0 ampere The diagram below shows two coils A and B placed parallel to each other at a very small distance Coil A is connected to an...
- Q A simple a c as shown in figure i 201 1 0 W emf V 1 0 2 0 Figure 1 If the speed of the coil is changed then...
- Q Find the terminal voltage and resistance of the load The de shunt generator deliver power to the load of last four digits of your enrolment number W whose externa characteristics...
- Q Two capacitors C and C are charged to 120 V and 200 V respectively It is found that connecting them together the potential on each one can be made zero...
- Q A 250 V 12 000 W 3000 rpm de shunt motor has Rf Ra and full load efficiency of 120 N 0 35 and 85 respectively Determine the external resistance...
- Q A 1 transformer has Z 20 j80 Z 0 04 j0 2 and turns ratio of 30 1 espectively Flux lags the no load current Io 1 8 A by...
- Q Which one of the following statements is not correct 1 A diode does not obey Ohm s law 2 A PN junction diode symbol shows an arrow identifying the direction...
- Q Implement the following Boolean function using PAL with four inputs and 3 wire AND O structure Also write PAL programming table Fi A B C D Em 2 12 13...
- Q In the inductive circuit given in the figure the current rises after the switch is put on At instant when the current is 15 mA then potential difference across the...
- Q 47 electrical energy with time is correctly shown If charge in Q capacitor varies as 0 0 in LC oscillation U 1 1 2 3 U T 2T U mm...
- Q A parallel AC circuit has two branches One branch contains a resistance of 8 ohm inductance of 19 1 mH in series and the other branch contains a resistance of...
- Q In the following circuit the potential of source i E 200 volt R 2002 L 0 1 H C 10 6 fara and frequency is variable then the current a...
- Q In the L C circuit shown in figure the current is in direction shown in the figure and charges on the capacitor plates have sign shown in the figure At...
- Q 7 An L R C series circuit consists of an a c voltage supply with an amplitude of 120 V at an angular frequency of 60 rad s a 335...
- Q Three identical resistors each of value 402 are connected first in star and then in delta across a 200 V three phase 50 Hz supply Calculate the power taken from...
- Q LCR circuit is analogous to driving force F t mechanics 1 Current dq dt here q is the charge 2 Inductance L 3 Capacitance C 4 Walte 1 1
- Q The primary coil of a transformer has 425 turns the secondary coil has 1000 turns An alternating current is sent through the primary coil The emf in the primary is...
- Q b Two current i 50 Sin cot i 95 Sin oot 450 are flowing through a common conductor Find an expression for the total current in similar form Find also...
- Q Phase of current in LC 1 Is in the phase of potential 2 Leading from the phase of potential 3 Lagging from the phase of potential 4 Before resonance frequency...
- Q An ac generator with a frequency of 125 Hz and an rms voltage of 42 5 V is connected in series with a 10 0 k resistor and a 0...
- Q View in English A resistance of 400 a coil of inductive reactance 2002 and capacitor of capacitive reactance 50 0 are connected across 250 V mains in series The potential...
- Q An ideal choke draws a current of 8A when connected to an AC supply of 100 V 50 Hz A pure resistor draws a current of 10 A when connected...
- Q 77 The input signal given to a CE amplifier having a voltage gain of 150 is V 2 cos 15t 151 corresponding output signal will be 2015 RS b c...
- Q 42 A sinusoidal voltage of rms value 220 V is applied to a diode and a resistor R in the circuit shown in figure so that half wave rectification occurs...
- Q In an L C circuit consisting of 20 mH inductor and 0 1 F capacitor the maximum current in the circuit is 0 15A The maximum voltage across the capacitor...
- Q 36 A series L C R circuit is connected to an AC source Using the phasor diagram derive the expression for the impedance of the circuit Plot a graph to...
- Q 4 There is a 5 resistance in an A C circuit Inductance of 0 1 H is connected with it in series If equation of A C e m f...
- Q 64 When a DC voltage of 200V is applied to a coil of self inductance 2 3 H a current of 1A flows through it But by replacing DC source...
- Q 4 1 592 A battery of emf 10V is connected to resistance as shown in figure The potential difference V between the points A and B is 322 10V 1...
- Q An RLC series circuit has a 1 00 k2 resistor a 160 mH inductor and a 25 0 nF capacitor a Find the circuit s impedance at 502 Hz b...
- Q 5 9 A 402 electric heater is connected to a 200 V 50 Hz mains supply The peak value of electric current flowing in the circuit is approximately A 2...
- Q An AC source with a maximum voltage of 125 V and F 55 0 Hz is connected between points a and d in the figure below Calculate the rms voltages...
- Q 5 2 The potential difference V and the current i flowing through an instrument in an AC circuit of frequency f are given as V cos oot volts and i...
- Q A Coil of power factor 0 6 is in series with a 100 F when connected to a 5 Hz supply the p d across the coil is equal to...
- Q https rogo nottingham ac uk paper start php id 23949160977807391429 dont record true 9 Which is the correct circuit to change an AC input to a smoothed DC output a...
- Q V R A circuit with a variable voltage source is constructed as diagrammed above At t 0 the switch is closed and the variable voltage source provides a consistent magnitude...
- Q 5 30 In the circuit shown below what will be the readings of the voltmeter V3 and ammeter A vvvvvvv Vc referenc A 800 V 2A Je 220 V 2...
- Q A Reconfigurable RCL Circuit A series RCL circuit is composed of a resistor R 220 two identical capacitors C 4 00 nF connected in series and two identical inductors L...
- Q An LCR series circuit containing a resistance of 1200 has angular resonance frequency 4 x 105 rad s 1 At resonance the voltage across resistance and inductance are 60V and...
- Q An alternating current varying sinusoidally at 50 Hz has its rms value of 10A Write down an equation for the instantaneous value of the current Find the value of the...
- Q 67 The LCR circuit shown below is driven by an voltage source a 1 VIC ww R 1 The angular frequency amplitude across the capacitor is a maximum is 000000...
- Q ALLEN 1 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...
- Q 5 44 In the AC circuit shown in figure 5 299 the voltmeter whose reading will be zero at resonance is V V V ooooo 11 L C V Figure...
- Q A 40 F capacitor is connected to a 200 V 50 ac supply The rms value of the current in t circuit is nearly 1 7 A 2 05 A...
- Q 5 39 In the steady state condition the rate of heat produced in a choke coil is P The time constant of the choke coil it t If now the...
- Q A sinusoidal voltage wave whose maximum value is V can be represented as ARS Vm 20 Im Ve All of these V Sin ot
- Q The self inductance of the motor of an electric fan is 10H In order to impart maximum power at 50 Hz it should be connected to a capacitance of 1...
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