Physics question and answers for November 18, 2023
- Q This section O P In an a c circuit the voltage applied is E Eosinot The resulting current in the circuit is coset The average power P consumption in the...
- Q This section contains 20 SINGLE CORRECT TYPE questions Each question has 4 choices 1 2 3 a When resonance is produced in a series LCR circuit then which of the...
- Q tal signals i do not provide a continuous set of values ii represent values as discrete steps iii can utilize binary system and iv can utilize decimal as well as...
- Q In series L C R circuit voltage drop across resistance is 8 V across inductor is 6 V and across capacitor is 12 V Then 1 Voltage of the source...
- Q A 50 Q resistor is connected in series with a coil and a sinusoidal ac source of effective voltage 50 V If the effective voltage drop across the resistor is...
- Q For an series RLC circuit the voltage of the circuit is given by Av 120V sin wt and R 2000 L 0 5H C 8uF Find the potential difference between...
- Q In the circuit shown source may be AC or DC At t 0 switch S is closed Choose the correct statement s LLC A B e D After a long...
- Q Q3 When a pure resistance R pure inductor L and an ideal capacitor of capacitance C is connected in series to a source of alternating emf then current at any...
- Q If resistance of 3T and reactance of 4 are connected in a c circuit then power factor of circuit will be 31 Options 0 8 0 6 1 33
- Q An L C circuit oscillates at frequency of 100 Hz At t 0 the capacitor of 4 F is charged to 5 C and current in circuit is zero The...
- Q 21 A device X is connected to an a c source The variation of vo power in one complete cycle is shown in Fig 75 7 28 1MW power 10...
- Q Q 26 A LCR circuit is connected in series If at resonance it has L 150pH and C 200PF Then calculate band width A 0 2 X 10 radian sec...
- Q d 5 2 A 2 An alternating current generator has an internal resistance Rg and an internal reactance Xg It is used to supply power to a passive load consisting...
- Q 4 For the circuit given below assume that 100 Vr 25 mV VCE SAT 0 2 V and VBE VD 0 7 V Find the collector currents of both transistors...
- Q Current in an AC circuit is given by i 3 sin oot 4 cos cot Then A rms value of current is 5A 55A x B C D 6 mean...
- Q 3 A battery is charged at a potential of 15 V for 8 h when the current flowing is 10 A The battery on discharge supplies a current of 5...
- Q It is desired to set up an undriven L C circuit in which the capacitor is originally charged to potential difference of 100 0 V The maximum curren is to...
- Q A 750Hz 20 V rms source is connected to a resistance of 100 S2 an inductance of 0 1803 H and a capacitance of 10 F all in series The...
- Q A thin superconducting zero resistance ring is held above a vertical long solenoid as shown in the figure The axis of symmetry of the ring is same to that of...
- Q 4 A simple ac circuit is composed of a capacitor connected across the terminals of an ac power source If the frequency of the source is doubled what happens to...
- Q A series LCR circuit containing 5 0 H inductor 80 F capacitor and 40 resistor is connected to 230 V variable frequency ac source The angular frequencies of the source...
- Q An ac source of angular frequency is across a resistor r and a capacitor C in se The current in the circuit measured is 1 If nov requency of source...
- Q A small metallic ball is charged positively and negatively in a sinusoidal manner at a frequency of 10 aps The maximum charge on the ball is 10 6 C What...
- Q CAREER INSTITUTE 35 In the given A C circuit if value of R is changed then 35 f n veuredt ufqu ti a R 10 V 10 V oooooo 10...
- Q For transistor action n Base emitter and collector regions she have similar size and doping concentration b The base region must be very thin and lig dopod c The emitter...
- Q View in English The potential difference V and the current I flowing through an instrument in an ac circuit of frequency t are given by V 5 cos wt volts...
- Q When an AC of 200V is applied across a device X a current of 0 5A flows through the circuit and is in phase with the applied voltage When the...
- Q In a series LCR circuit the supply voltage is 130 volt The RMS voltage drop across resistor is 50 volt and RMS voltage drop across inductor is 130 volt the...
- Q When frequency of an AC voltage source applied to a LC series circuit is gradually increased from low value the current in the circuit Monotonically increases First increases and then...
- Q A Capacitor of capacitance C 2uF chargd with qo 60 F is connected to the inductor circuit by closing the switch S Inductor circuit is containing an inductor of inductance...
- Q Two resistors of resistances R 300 3 ohm and R 200 2 ohm are connected in parallel The equivalent resistance of parallel combination with error is NCERT Pg 37 1...
- Q In the R C circuit shown below RC E 200sinot volt 300 Correct Answer A The average power dissipated is 300 watt C gkay af guich D 100 2 B...
- Q 4 Self inductance and resistance of a coil are 30mH and 20 respectively It is connected to a 300 resistance and a 2V battery in series How much energy will...
- Q 42 In a series resonant LCR circuit the voltage across R is 100 V and R 1 kilo ohm C 2 micro farad The resonant frequency w is 200 rad...
- Q 7 In the given circuit the voltage across the load is maintained at 12 V The current in the zener diode varies from 0 50 mA What is the maximum...
- Q One end of a long string of linear mass density 8 0 x 10 kg m is connected to an electrically driven tuning fork of frequency 256 Hz The other...
- Q A capacitor of capacitance C has initial charge Qu and connected to inductor L as shown at t 0 switch S is pressed The current through the inductor when energy...
- Q A series LCR circuit has a capacitor 6 25 F in series with a resistance R 300 22 and an inductance L The circuit is driven by a voltage V...
- Q 8 The primary coil of an ideal transformer has 100 turns and secondary coil has 200 turns Then select the correct option 1 Voltage in primary coil is two times...
- Q Consider the A C circuit as shown in the figure and choose CORRECT option s R M S value of potential difference between A and B is VAB R wwwwww...
- Q The differential equation governing the voltage v of a parallel RLC circuit is given by d v 1 dv V C 0 dt2 R dt L where L 10 x...
- Q In the circuit shown in the figure the switch S is closed at the moment t 0 C www R wwww R At the moment t RC In2 the currents...
- Q A source of alternating EMF is connected to a series combination of L C and R The maximum and minimum value of instantaneous power delivered to the LCR circuit are...
- Q 5 A capacitor of capacitance 120 F is connected to a battery of emf 6 00 V and internal resistance 1 00 through resistanceless leads 12 0 us after the...
- Q In a room heater an alternating current given by the expression A cos ot B sin ot produces heat at the same rate as that by a direct current I...
- Q 37 Block diagram of an amplifier is given as Vor 2 2Sin 157t 3 The value of x is 300350 gain Av the X H 1 x issin 157t 3...
- Q Discharge of capacitor C through inductor L is oscillatory with period T The charge on capacitor at t T 2 is A one fourth of maximum charge B 0 C...
- Q 4 40 V 4 40 V 44 In AC circuit E 120 2 sin100at and I 10 2 sin 44 AC E 120 2 sin100t1 10 2 100m then the...
- Q 0 10 points FM modulator with a carrier fo 1 kHz and kf 80x The carrier amplitude A emcy modulated i talending the demodulator block diagram shown in Figure 2...
- Q MA 2015 23 A series R C circuit is connected to an alternating voltage source Consider two situations a When capacitor is air filled b When capacitor is mica filled...
- Q B C the following options Circuit component across an ac source 200 rad sec 1002 000000 SH IkQ 500 F 500 F rooooo H 3 F www 000000 SH CTANCE...
- Q 5 T Consider a series L R circuit in which L H and resistance R 100 2 When the circuit is connected to a c source 220 V 50 Hz...
- Q A stepdown transformer increases input current from 4 A to 24 A in secondary coil If the number of turns in primary is 660 the number of turns in secondary...
- Q Question 5 Three electric bulbs 40W 60W 100W are designed to work on a 220V mains Which bulb will burn most brightly if they are connected in sereis across 220V...
- Q 5 Switch is in position 1 for a long time At time t 0 it is shifted to position 2 Find the maximum charge which will accumulate on capacitor E...
- Q Voltage applied to an AC circuit and current flowing in it is given by 200 2 sin wt and V 2 cos wt 77 Then power consumed in the circuit...
- Q The diagram shows a inductor C and a resistor R connected in series to an AC source V and V are voltmeters and A is an ammeter Consider now the...
- Q 35 180 In an AC circuit resistance R inductance L and capacitor C are connected in series When Lis removed from the circuit the phase difference between voltage and current...
- Q 8 An electric bulb has a rated power of 50W at 100V If it is used on an AC source of 200V 50Hz a choke has to be used in...
- Q An uncharged capacitor of capacitance C is connected to a battery of emf a at t 0 through a resistance R the i the maximum rate at which energy is...
- Q 83 A condenser of capacity C is charged to a potent difference of V The plates of the condenser are the connected to an ideal inductor of inductance LT current...
- Q If the rms current in a 50 Hz ac circuit is 5 A the value of the current 1 300 seconds after its value becomes zero is a 5 2A...
- Q MtG Objective NCERT P woltage source 81 An LC circuit contains a 20 mH inductor and 25 F capacitor with an initial charge of 5 mc The total energy stored...
- Q 19 What will be the reading of the voltmeter across the resistance and ammeter in the circuit shown in the figure A a 300 V 2 A c 100 V...
- Q c 1 57 4 71 7 85 d 1 57 3 14 4 71 80 An LC circuit contains a 20 mH inductor and a 50 F capacitor with an...
- Q 4 In an electrical circuit R L C and ac voltage source 81 are all connected in series When L is removed from the circuit the phase difference between the...
- Q LC OSCILLATIONS 76 The natural frequency of oscillations in LC circuit is given by a 2n LC b T 2LC c TIC LC 77 A fully charged capacitor C with...
- Q 79 An LC circuit contains a 40 mH inductor and a 25 F capacitor The resistance of the circuit is negligible The time is measured from the instant the circuit...
- Q 2 2 5 A voltage of peak value 283 V and varying frequency is applied to series LCR combination in which R 302 L 25 mH and C 400 F...
- Q 17 Choose the wrong statement wL a The dimensions of are same as that of strain R b The dimensions of 1 LC are same as that of angular velocity...
- Q 57 Figure shows a series LCR circuit connected to a variable frequency 230 V source 80 pF SH oooo The source frequency resonance is a 4 Hz b 5 Hz...
- Q 15 The electric current in a circuit is given by i 3t Here tis in second and iin ampere The rms curren for the period t 0 to t 1s...
- Q 78 A charged 30 uF capacitor is connected to a 27 mH inductor The angular frequency of free oscillations of the circuit is a 1 1 x 10 rad s...
- Q When an ac source of voltage V V sin1001 is connected across a circuit the phase difference between the voltage V and current I in the circuit is observed to...
- Q 58 A series LCR circuit has R 5 2 L 40 mH and C 1 F the bandwidth of the circuit is a 10 Hz b 20 Hz c 30...
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