Physics question and answers for January 03, 2024
- Q 36 Apply Thevenin s theorem to calculate the current flowing through the 30 22 resistor connected across terminals AB in the network shown 1592 www 150 V 60 52 ww...
- Q Q2 a Why digital multimeters are preferred over the conventional analog multimeters for testing an electronics circuit How a multimeter is used both as an ammeter and a voltmeter Explain...
- Q Q10 In the potentiometer setup a driving cell with EMF 25V and interval resistance in is used Length of the potentiometer wire is 150cm and its resistance is 40 The...
- Q Two conductors of same length and area of cross section are connected in series as show in the figure An electric current i flows through them The total charge accumulated...
- Q A pure inductor of 30 0 mH is connected to a source of 250 V Find the inductive reactance in and rms current in A in the circuit if the...
- Q Eight resistors are connected in a circuit as shown below If Rxy represents equivalent resistance between any points x and y then A B 50 20 30 40 40 30...
- Q 5 For the circuits shown in Fig 5 a and Fig 5 b determine the value of load resistance R so that it will receive maximum power Also calculate the...
- Q 7 Find the static and dynamic resistance of a p n junction germanium diode if the temperature is 27 C and IO 1uA for an applied forward bias of 0...
- Q which has 2 Columns Column I and Column II Column I has four entries A B C and D Column has four entries P Q R and S Match the...
- Q The value of Resistance R in 2 such that heat developed in it is maximum when switch S is open Then find the value of 10R In the circuit 10V...
- Q 8 A battery of unknown emf is connected across resistances as shown in fig below The voltage drop across the 8 Q resistor is 20 V What will be the...
- Q In the following figure two insulating sheets with thermal resistance R and 2R are shown The temperature of the interface 0 is 1 20 C 3 75 C 3R R...
- Q Find the resistance between terminals X and Y of the bridge circuit shown in Fig 6 applying a delta to star conversion and b star to delta conversion X B...
- Q that of steel then Both have equal conductivity O b Copper is a good conductor than steel a O c Steel is a good conductor than copper What will be...
- Q The ratio of thermal conductivity of two rods of different material is 5 4 The two rods of same area of cross section and same thermal resistance will have the...
- Q PASSAGE A 230V de shunt motor takes 51 A current at full load Motor has armature resistance and field winding resistance of 0 1 ohm and 230 ohm respectively By...
- Q In the given capacitance circuit all the capacitors are uncharged Find the charge flown through the battery as the switch S is clo 1 F 1 F 1 F 1...
- Q 1 The diagram shown below depicts a situation where a potential difference of 220V is applied across two ends of rheostat The resistance of rheostat is 7000 2 For the...
- Q A number of cells of negligible resistance are connected with two resistances in series A voltmeter of resistance 5000 while connected with these two resistances reads 4 V and 6...
- Q 88 A steady current flows in a metallic conductor c non uniform cross section The quantity quantitie that remain constant along the length of conduct is are 1 current electric...
- Q Q 6 In an industry an engineer is designing a dc shunt machine working as a motor It is containing an armature resistance of 0 060 and shunt resistance of...
- Q Q 14 In any power plant it is having three phase 440V 50Hz ac supply and carrying some electrical equipments for working on a machine In a manager room there...
- Q A 230V D C shunt motor has an armature resistance of 0 502 and Rsh of 1152 At no load the speed is 1200 r pm and the IA is...
- Q Q25 A person is working with an electrical circuit having a load resistance of 100 KQ and two digital multimeters of internal resistances 10 MQ and 1000 KN Which multimeter...
- Q Q3 Three 20 22 non inductive resistors are connected in star across a three phase supply the line voltage of which is 480 V Three other equal non inductive resistors...
- Q 61 Power dissipated across the 8 2 resistor in the circuit shown here is 2 W The power dissipated in watt units across the 3 2 resistor is 1 2...
- Q Q2 Each phase of a delta connected load comprises a resistor of 50 2 and capacitor of 50 F in series Calculate a the line and phase currents b the...
- Q In producing chlorine by electrolysis 100 kW power at 125 V is being consumed How much chlorine per minute is liberated ECE of chlorine is 0 367 x 10 6...
- Q 20 The resistances in the two arms of the meter bridge are 59 and R2 respectively When the resistance R is shunted with an equal resistance the new balance point...
- Q 21 A potentiometer circuit has been set up for finding the internal resistance of a given cell The main battery used across the potentiometer wire has an emf of 2...
- Q 29 If voltage across a bulb rated 220 V 100 W drops by 2 5 of its rated value the percentage of the rated value by which the power would...
- Q 2 Using the five band code indicate the colors of the bands for each of the following resistor 520 2 1 1 Point Green Red Brown Black Brown Green Red...
- Q In the figure c 8 51 V R 23200 R 32100 and Rg 3950 02 What are the potential differences in V a VA VB b VB Vc c Vc...
- Q Two resistances R r and an inductor of inductance L are connected in series with an A C voltage source Three voltmeter are also connected as shown in the figure...
- Q each of the circuits shown below each have the same resistance Which of the following gives the circuits in order of increasing total resistance
- Q Current in R in the shown circuit D R www Im A just after closing the switch is zero B long after closing the switch is zero C EE R3...
- Q 10 Find the equivalent resistance of the network between the points A and B shown in the figure If A and B are connected to a 13 V battery so...
- Q Seven resistors each of resistance 9 are connected across a 14 V battery as shown below www R IN 1 A 2 R ww WWW ww www R3 R R5...
- Q Use superposition to find the current Is through the 3ft resistor You must use the principle of superposition only to solve this problem You may verify your solution using other...
- Q Five resistors R R5 6 02 R R4 3 2 and R3 12 2 are connected with a 12 V battery as shown Then R R R R R wwwwwwwwwwww...
- Q If E denotes the intensity of the electric field the dimensions of the quantity E 0 are those dE dt of A Current B Current density C Electric potential D...
- Q Two strain gauges are mounted so that they sense axial strain on a steel member in uniaxial tension The 120 V gauges form two legs of a Wheatstone bridge and...
- Q A galvanometer having a resistance G and current i flowing in it produces full scale deflection If S is the value of shunt which converts it into an ammeter of...
- Q 240 V dc shunt motor takes 10A and 30A at no load and full load respectively It is having armature resistance of 0 4 ohm d field resistance of 120...
- Q Two sources of equal emf are connected in series This combination is in turn connected to an external resistance R The internal resistance of two sources are r and 1...
- Q 25 Resistance of a resistance thermometer has values 2 71 and 3 7002 at 10 C and 100 C The temperafure at which the resistance is 3 262 is 1...
- Q CE0214 25 Two wires of resistance R and R at 0 C have temperature coefficients of resistance a and a respectively These are joined in series The effective temperature coefficient...
- Q 22 In a de circuit the direction of current inside the battery and outside battery respectively are a positive to negative terminal and negative to positive terminal b positive to...
- Q a i An electric kettle contains 600g of water at 20 C The heater in the kettle operates at 240V The specific heat capacity of water is 4200 J kg...
- Q 3 a Obtain maximum amount of power transfer in R from the sources using maximum power transfer theorem in the network shown in Fig S 104 SA R www www...
- Q 3 Show graphically the variations of a Resistance vs potential difference at constant temperature b Electric current vs potential defference at constant tempera
- Q A filament bulb 500 W 100 V is to be used in a 230 V main supply When a resistance R is connected in series it works perfectly and the...
- Q A set of n equal resistors of value R each are connected in series to a battery of emf E and internal resistance R The current drawn is Now the...
- Q A potentiometer wire has length 4 m and resistance 8 Q The resistance that must be connected in series with the wire and an accumulator of e m f 2...
- Q power 3 ohm m Current density is given as OPTIONS 4 31 X 10 power 8 A m2 6 31 X 10 power 6 A m2 710 03
- Q steady current e wire is 4 V x 20 cm is 20 V 100 cm For circuit shown in figure the current must not exceed A B 1 1 mA...
- Q ay Forward In the following circuit the potential difference between A and B VB VA is A R 2A wwww 15 V 1 10 V 3 15 V B 592...
- Q In the absence of electric field possible path of free electrons inside a conductor between consecutive collision is NCERT Pg 100 1 Hyperbolic 3 Parabolic 2 Straight line 4 Elliptical
- Q R R R R E In the above network R 2 2 and E 12 V The equivalent resistance of the above netwo and current through each branch of the...
- Q of radius R t The initial rical region is 2A s 9 If current in an electric bulb is decreased by 25 then how will power in the bulb change...
- Q Electrical power is transmitted from power stations to different places via transmission cables at very high voltage to for Minimize power loss during transmission Safety of people Maximize power loss...
- Q A piece of wire of resistance R is cut into five equal parts These parts are then connected in parallel The new resistance of this combination is R then the...
- Q In a potentiometer circuit the balancing length of resistance wire for cell of electromotiv force E and negligible internal resistance is L If one more cell of same electromotive force...
- Q An electrical circuit is shown in the figure Calculate the potential difference across the resistance 00 ohm as will be measured by the voltmeter V of resistance 400 ohm either...
- Q 2 3 6 LIMITATIONS OF OHM S LAW Although Ohm s law has been found valid over a large class of materials there do exist materials and devices used in...
- Q A carbon resistor has coloured strips as brown green Orange and silver respectively The values of resistance S O 15 KQ 10 15 KQ 5 15 KQ 20 O 10...
- Q re than t and some less than t In other words the time t in 5 will be less than t for some and more than t for others as...
- Q In the circuit shown the instruments are ideal Then readings of ammeter and voltmeter s are B 4 92 ww Only one correct answer A 1 A 10 V C...
- Q EMF of a cell is potential difference across the terminals of the cell when they are a open b externally connected by a wire c internally connected by a wire...
- Q Q 11 SUBJECTIVE NUMERICAL Three monochromatic sources having wavelengths 12 42 nm 6 21 nm and 24 84 nm are placed close to each other in front of a converging...
- Q 10 A parallel plate capacitor is charged to 60 C The plate losses charge at the rate of 1 8x10 8 Cs The magnitude of displacement current is 1 1...
- Q An accumulator of 4 V is connected through a resistance of 30 2 to a potentiometer wire 10 m long and of resistance 30 2 When a cell is connected...
- Q 3 The length of a given cylindrical wire is increased by 100 Due to the consequent decrease in diamete the change in the resistance of the wire will be 100...
- Q A potentiometer wire of length 1 m and resistance 10 2 is connected in series with a cell of e m f 2 V with internal resistance 1 and a...
- Q 77 Two cells with the same emf E and different internal resistances r1 and r2 r are connected in series to an external resistance R The value of R so...
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