Physics question and answers for December 25, 2023
- Q A 2 V battery a 990 Q resistor and a potentiometer of 2 m length all are connected in series The resistance of potentiometer wire is 100 then potential gradient...
- Q 0 In the circuit shown i will be equal to 30 1 1 A 3 4 A 4V 60 www 202 2 2 A 4 0 5 A 20 f...
- Q If a voltage of 2 5j and another voltage of 3 6j flows through two different resistors connected in series in a circuit find the total voltage in the circuit...
- Q hick 81 In the circuit shown from A to B then A A www 20 9 ww 5Q W w 59 D 209 B is passing 1 No heating and...
- Q The part of an electrical circuit that converts electrical energy into other forms of usable energy The unit used to measure energy usage The reason incandescent bulbs have been banned...
- Q b A 10m long potentiometer wire carries a steady current A 1 018 V standard cell is balanced at a length of 850cm Find i the potential gradient along the...
- Q 11 A house has a lamp in every room The circuit for the lamps is shown The voltage drop across the energy source is 120 V The total resistance is...
- Q The equation for an alternating current is given by i 77 sin 314t Find the peak value frequency time period and instantaneous value at t 2 ms Answer A B...
- Q 10 The total resistance of this circuit is 25 2 The voltage drop across the battery is 6 0V T I XXX a Calculate the current in the circuit 4...
- Q S 5 A galvanometer having internal resistance 10 requires 0 01 A for a full scale deflection To convert this galvanometer to a voltmeter of full scale deflection at 120...
- Q 2 19 Choose the correct waveform that can represent the voltage across R of the following circuit assuming the diode is ideal one V 10 sinot tions 3 1 N...
- Q In the situation shown in each cell has e m f 4 V and int al resistance 10 The maximum power that can be delive ed to the variable load...
- Q A 6 A voltmeter has a least count of 0 1 V and an ammeter has a least count of 0 1 A The potential drop V across a resistor...
- Q where all resistor are of 1k If a current of magnitude 1mA flows through the resistor marked X What is the potential difference measured between points P and Q P...
- Q The current in a conductor and the potential difference across its ends are measured by an ammeter and a voltmeter The meters draw negligible currents The ammeter is accurate but...
- Q In the circuit shown in figure find the value of r internal resistance of the cell for which power transferred by the cell is maximum 50V 1 40 2 12...
- Q 24 Two bulbs A and B are connected as shown When switch S is closed then which of them wi fuse 100 V 50 W 100 V 40 W A...
- Q Q 16 In the circuit shown switch is connected to 1 for a very long time At a particular instant t 0 switch is shifted to 2 the current in...
- Q What is the equivalent resistance between the points A and B of the network 392 202 A 1 2 3 57 80 292 www 60 403 1022 wwww 1 892...
- Q A flows in a system of conductors as shown potential difference VA VB will be Odisha JEE 2011 12 ev V 2A D 292 30 www 302 20
- Q A spherical shell of radius R is given charge 3q on its surface and a point charge q is placed at distance R 2 from its centre C Also there...
- Q 2 An ac voltmeter connected between points A and B in the circuit below reads 36 V If it is connected between A and C the reading is 39 V...
- Q There is a system of four large parallel plates A B C and D Plates A and C are connected to each other with the help of metallic wire and...
- Q An ammeter and a voltmeter are joined in series to a cell Their readings are A and V respectively If a resistance is now joined in parallel with the voltmeter...
- Q In the circuit shown in the figure 3 volts E2 2 volts E3 1 volt and R r r r3 1 Find the potential difference between the points A B...
- Q Resistance in the two gaps of a meter bridge are 10 ohms and 30 ohms respectively If the resistances are interchanged the balance point shifts by 1 33 3 cm...
- Q QIn the circuit shown in figure E 3V E2 2V E3 1V and 1ohm r1 r2 73 a Find the potential difference between the points A and B and the...
- Q The circuit diagram shows that resistors 20 40 and RN connected to a battery of e m f 2 V and internal resistance 3 A main current of 0 25...
- Q In the circuit shown in figure belwo E 17V E2 21 V R 2N R 3N 50 Using Kirchhoff s laws and R3 find the currents flowing through the resistors...
- Q In Figure 1 6 00V 2 12 0V R 100N R 2009 and R3 300 One point of the circuit is grounded V 0 What are the a size and...
- Q Q45 A battery of e m f 10 V and internal resistance 3 2 is connected to a resistor and the current in the circuit is 0 5 A The...
- Q In the circuit shown in figure 32 E13 3 V 2 2 V 3 1 V and 1 Find the potential difference between the points A and B and the...
- Q resistance R of the circuit shown in Fig if the resistances are equal to R 10N R 20 and R3 30 and the potentials of points 1 2 and 3...
- Q V230 V 0 192 1 22 0 06 2 Fig 2 80 determine the branch currents using Kirchhoff s laws 0 05 1 192 1151 35A 224 55A 27 7A...
- Q internal resistance r is connected across an external resistance R The maximum power is external circuit is 9 W The current flowing through the circuit in these conditions is 3...
- Q 28 29 1 3Q 2 22 3 692 4 36 2 Reading of Ammeter A and respectively 30V 3092 30V 3002 A and A will be 28 A 10V 1092...
- Q Full scale deflection current for galvanometer is 1 Amp What should be the value of shunt resistance so that galvanometer shows half scale deflection A B C 10 Q 10...
- Q A cylindrical copper wire is stretched such that its diameter decreases by 0 01 The approximate percentage increase in its resistance is A B C 0 02 0 04 0...
- Q Difference in balance length for two cells in potentiometre wire is 20 cm and difference in their emf s is 0 6 volt If length of wire is 5 m...
- Q A solid metallic cupold oi nomogeneous material having geometrical dimension as shown in the figure will have a ratio of resistances for the sense of current along x y and...
- Q Choose the INCORRECT statement s A B C D Kirchoff s voltage law is based on conservative nature electrostatic field Kirchoff s current law is based on charge conservation Battery...
- Q Problem 3 23 How many number of turns of nichrome wire of specific resistance 10 Qm and diameter 2mm that should be wound on a cylinder of diameter 5cm to...
- Q vibrational degree of freedom In the figure ammeters read a current of 1A each as shown while the voltmeter reads a potential difference of 3V The ammeters are identical the...
- Q A voltmeter having a resistance of 1800 is employed to measure the potential difference across 2000 resistance which is connected to dc power supply of 50 V and internal resistance...
- Q connected across a resistor R A voltmeter having variable resistance is used to measure the potential difference across the resistor The plot of voltmeter reading V against G is shown...
- Q 38 Five resistors each of value m are connected between points A and F as shown in figure If two similar wire resistor are connected one between points B and...
- Q Figure shows a potentiometer circuit The length of potentiometer wire is L and its resistance is 2R Neglect the internal resistance of the cells Select the correct alternative A B...
- Q QAn ideal p n junction diode can withstand currents up to 10mA under forward bias The diode has a potential difference of 0 5V across it which is assumed to...
- Q A conducting rod pq is sliding on two parallel conducting rods with constant velocity in a uniform magnetic field of induction B 2 Wb m2 as shown in the figure...
- Q If the capacitance of a Van de Graaff accelerator terminal is 250 F pF and if it operates at a voltage of 4 MV what is the total charge on...
- Q A heater coil is cut into two parts of equal length and one of them is used in the heater The ratio of the heat produced by this half coil...
- Q 38 A carbon resistor of 56 5 6 k2 is to be marked with rings of different colours for its identification The colour code sequence will be a green blue...
- Q 05 A plane loop shown in Fig 3 91 is shaped as two squares with sides a 20 cm and b 10 cm and is introduced into a uniform magnetic...
- Q rom of are chen 28 A galvanometer has resistance G and full scale deflection current i To convert this galvanometer into an ammeter of range 10 i a shunt S...
- Q 3 Five identical cells are connected in parallel Now polarity of one of the cells is reversed Percentage change in equivalent emf will be a 10 c 40 b 20...
- Q t ww E AAT H a E b r 08 ou 3081 0 m E No current a c In which of the above cells the potential difference between the...
- Q 24 The n rows each containing m cells in series are joined in parallel Maximum current is taken from this combination across an external resistance of 30 resistance If the...
- Q 40 A series parallel combination of batteries consisting of 300 identical cells each with an internal resistance r 0 3 2 is loaded with an external resistance R 10 22...
- Q 9 In the figure the potentiometer wire of length 1 100 cm and resistance 9 22 is joined to a cell of emf E 10 V and internal resistance 12...
- Q 5 Resistance of a wire at temperature t Cis R Ro 1 at bt Here Ro is the temperature at 0 C The temperatu coefficient of resistance at temperature t...
- Q 21 In the circuit shown in figure when switch S 15 closed and S is open the ideal voltmeter shows a reading of 18 V When switch S2 is closed...
- Q VM 48 A battery of emf E and internal resistance r is connected across a 10 resistance R Resistance R can be adjusted to any value greater than or equal...
- Q 20 For what value of R in the circuit as shown current passing through 4 2 resistance will be zero a 19 www 292 10V b 29 452 6V HH...
- Q Mr Vivek Taparia performed an experiment to verify Ohm s law He connected following circuit to measure voltage and current k R wwww Here R is the unknown resistance V...
- Q 18 A resistance of 302 is connected in the left gap of a meter bridge and a resistance 62 in the right half Total resistance of the 1 m long...
- Q During an experiment with a metre bridge the galvanometer shows a null point when the jockey is pressed at 40 0 cm using a standard resistance of 90 as shown...
- Q 39 In the situation shown the readings of ideal ammeters A and A are in the ratio 50 VI 1 1 1 2 1 3 3 3 1 R RR...
- Q Q8 Two capacitors of capacity 10uF each are connected in parallel The parallel combination is further connected in series with two capacitors of capacity 20 F 40 F respectively Calculate...
- Q B The resistance between the terminal point P and Q of the given infinitely long circuit will be in 92 12 12 12 ww ww P www A 19 1...
- Q 5 A parallel plate capacitor has a plate area A and separation d A battery charges the plates to a potential difference V The battery is now disconnected and a...
- Q In a meter bridge an unknown resistance P is connected in the left gap and a 500 resistance in the right gap Null point is obtained at x cm from...
- Q 792 Part AC is 20 cm long Two resistors and two ideal cells are connected as shown 1v A 4 1v 292 O Of the points A R and C...
- Q The internal resistances of two cells shown a 0 1 and 0 30 If R 0 22 the potential difference across the cell 2V 0 102 2V 0 302 A...
- Q C 2mA from right to left The current in a wire varies with time according to the equation I 4 2t where J is in ampere and t is in...
- Q 3 0 6A 4 0 8A An inductor of 12 mH and a resistor of 4K are connected in series across a battery of 240 V through a switch After...
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