Physics question and answers for December 27, 2023
- Q Potentiometer It can measure potential difference without drawing a current from the circuft Thus it accurate reading and it can measure emf of a cell AB Potentiometer wire of resistance...
- Q In the figure shown the current through 20 resistor is 1 2 A 2 0 A 592 252 www Question Type Single Correct Type 3 4 A 10V 1092 www...
- Q The figure shows three circuits with identical batteries inductors and resistors Rank the circuits in the decreasing order according to the current through the battery i just after the switch...
- Q Two cells of emf 2V and 3V and internal res istances 1ohm and 2ohm respectively are C onnected in parallel across a 10ohm resisto r Calculate the current in each...
- Q Q 20 A uniform conducting wire is used to make a ring and its two diameters AB and CD The ring is placed in a uniform magnetic field B perpendicular...
- Q Choose the correct statement a A capacitor can conduct a de circuit but not an inductor b In a de circuit the inductor can conduct but not a capacitor c...
- Q 21 Potentiometer is an apparatus used for measuring the emf of a cell or potential difference between two points in an electrical circuit accurately It is also used to determine...
- Q The length of potentiometer wire is 1 m and its resistance is 40 A current of 5 mA is flowing in it An unknown source of emf is balanced on...
- Q ii Sensitivity of a potentiometer can be increased by a Decreasing potential gradient along the wire b Increasing potential gradient along the wire c Decreasing current through the wire d...
- Q A meter bridge is set up as shown to determine an unknown resistance X using a standard 10 ohm resistor The galvanometer shows null point when tapping key is at...
- Q A current of 1 mA is flowing through a potentiometer wire of length 4cm and of resistance 49 The potential gradient of the potentiometer wire is a 10 V m...
- Q Heat generated in a circuit is given by Q i2Rt where i is the current R is resistance and tis time If the percentage errors in measuring i R and...
- Q 16 A freighter is 240 km due cast of a harbour A current is flowing due south and the freighter captain wishes to set a course so that he can...
- Q Figure shows an electric circuit contain four resistors of equal resistances 4 2 Cells E E2 E3 are ideal of unknown EMF whereas cell E4 has some unknown internal resistance...
- Q Q 8 www ww 4 Effective resistance between point A and B for following network is each branch of resistance is R R 1 07 12
- Q Q of an emf lower than Q 18 Twelve wires each having resistance of 32 are connected to form a cubical network A battery of 10V and negligible internal resistance...
- Q 14 In the given electrical networks shown in Figs 3 185 a and b identical cells each of emf E are giving same current I Find the values of the...
- Q 9 Using Kirchhoff s rules determine the value of unknown resistance R in the circuit shown in Fig 3 180 so that no current flows through 402 resistance Also find...
- Q A wire is carrying 2 A current from left to right Drift speed of electron in conductor is 1 mm s A person is moving towards right with 1 mm...
- Q In steady state current flow through resistance R in given figure R wwww E E 2R E 3R EIR 2R wwww 0000 L
- Q A voltmeter reads 3 V at full scale deflection and is graded as 6000 2 V What resistance should be connected in series with it so that it reads 12...
- Q 0 Three resistons are connected as sheron through the resistor 5 2 a current of 1A is flowing A 1 what is the current the through other two resistiers 0...
- Q Three identical resistors R R and R3 are connected as shown in figure When the switch S is closed A Select answers B C www R D www R www...
- Q Three identical bulbs B B2 and B3 are connected in the arrangement as shown in the figure Choose the INCORRECT statement Select an answer A B B C P P2...
- Q 7 AB is a wire of potentiometer with the increase in the value of resistance R the shift in the balance point J will be R A B a towards...
- Q A cylindrical conductor has length inner radius a and outer radius 2a The resistivity p varies with radial distance Por r from the axis as p a conductor for radial...
- Q When two known resistances R and S are con nected in the left and right gaps of a metre bridge the balance point is found at a distance from the...
- Q The equivalent resistance of the network shown in the figure between points P and Q is 10 N W C 2 3 C 3 C 12 12 12 12 1222...
- Q Column 1 gives the circuit condition and Column 1 gives the value of R for maximum power consumption across R and value of maximum power Po dissipated across R corresponding...
- Q Two light bulbs shown in the circuit have ratings A 24 V 48 W and B 24 V and 36 W as shown Wi the switch is closed 12 V...
- Q 19 Current sensitivity of a moving coil galvanometer increased by 20 when its resistance is increased by a factor 2 twice The change in voltage sensitivity is a 25 increase...
- Q b i 1 1200 m r 0 6 cm Figure Q1 b i r 0 6 cm X Conductor plates d 2 mm Figure Q1 b ii A solid cylindrical...
- Q along edge 19 You are required to select a carbon resistor of resistance of 36 x 10 5 fr shop keeper What would be the sequence of colour bands to...
- Q The drift speed of free electrons in a conductor is 0 1 m s and the electric field in the conductor is 5 x 10 2 V m The mobility...
- Q SolveLancer Test By changing the magnetic flux through a coil of resistance 500 a current is induced in the coil as shown in the graph below The magnitude of change...
- Q 15 Dust Cloud Ignition Caused due to Static Electricity A case study investigates the reasons behind the ignition of dust cloud during a manual powder processing About 18 kg of...
- Q If H and H are amounts of total heat generated in a resistance R due to charge Q passing through it when current i through it changes in following ways...
- Q A cylindrical conductor of length L and radius R is connected between two plates which are maintained at a constant potential difference V see figure The conductivity of the cylindrical...
- Q A microammeter has a resistance of 10002 and full scale range of 50 A It can be used as a voltmeter or as a higher range ammeter provided a resistance...
- Q he switch S is closed at t 0 as shown in the figure R 302 www www R 60 36 V 1H D R 602 R 302 The current as...
- Q P www In the given figure a circuit is shown In this figure galvanometer G will have zero deflection only when O PQ RS PR QS OPS QR Q R...
- Q 9 6 when current passes through it if average The resistance of nichrome becomes 85 8 Nichrome has resistance of 75 3 2 at 30 C of nichrome now is...
- Q Two resistors of resistances 200k2 and 1M22 respectively form a potential divider with outer junctions maintained at potentials of 3V and 15V Then the potential at the junction between the...
- Q Two cells of equal e m f and of internal 3 resistances r and r r r are connected in series Now they are connected to an external resistance R...
- Q 8 V 6 V 202 ww 20 www R ww 1 7 A 2 10 A 3 2 A 4 8 A 13 When a metal conductor connected to right...
- Q Two parallel resistance less rails are connected by an inductor of inductance L at one end as shown in the figure A magnetic field B exists in the space which...
- Q A storage battery of emf 8 0 V and internal 29 resistance 0 50 is being charged by a 120 V dc supply using a series resistor of 15 50...
- Q A wire of resistance 120 m is bent to form a complete circle of radius 1 cm The resistance between its two diametrically opposite points A and B as shown...
- Q is A resistance of 2 Q2 is connected across one gap of a metre bridge the length of the wire is 100 cm and an unknown resistance greater than 2...
- Q 59 Consider the circuit shown in the figure In which resistor the amount of power dissipated is the largest 60 A RI B R2 C R3 D R4 A biconvey...
- Q A galvanometer has a resistance of 822 It gives a full scale deflection for a current of 10 mA It is to be converted into an ammeter of range 5A...
- Q 2221 222 47 7 What is the phase angle between the voltages of the inductor and capacitor in a RLC series circuit A 0 B 45 C 90 D 180...
- Q In the circuit shown in figure the 50 resistance develops 45 Js 1 of heat due to the flow of current through it 11mm 62 Imm 222 The value of...
- Q 1 Resistance Power Electric iron Current ver 1 2 C A A List 2 B B A Watt B Heating effects of electricity C Depends on length of the conducte...
- Q Two cells of unequal emfs E and E2 and internal resistances r and r2 are joined as shown in the figure Vp and Vo are the potential at P and...
- Q Galvanometer G having full scale deflection current and resistance R is used in combination with resistances to form an ammeter whose range 1 is given in Column II Match the...
- Q In the given circuit current 352 www E 10 V A Select answers B C 1 52 D www 202 8 02 www 202 www 202 80 40 Imm Imm...
- Q A carbon resistor has a set of co axial coloured rings as shown The resistance of the resistor is 0 M Green Blue Yellow Gold 56 10 5 Q 36...
- Q C d 400 2 3 In a potentiometer experiment two cells of e m f E and E are used in series and in www conjunction and the balancing length...
- Q Two wires that are made up of two different materials whose specific resistances are in the ratio 2 3 length 3 4 and area 4 5 The ratio of their...
- Q 1 Does therelaxation time in a conduct or depends on electric field i e if I chan ge the electric field will the relaxation ti me be changed or will...
- Q The power supplied by the cell in the shown circuit will be 2 W 32 wwwwww 62 ww 2 V
- Q A 1m 30 Two balls each of mass 1gm are suspended by insulating strings each of 1m At equilibrium angle between string and vertical is 30 Find charge on any...
- Q 56 Each resistor shown in figure is an infinite network of resistance 1 2 The effective resistance between points A and Bis 192 192 1922 a less than 10 e...
- Q A charge particle q lies at the centre of two concentric hollow spheres of inner radii 2R and 6R and outer radii 4R and 8R respectively The amount of work...
- Q In a circuit voltmeter reads 3V and the ammeter reads 2A Then wrong option is Question Type Single Correct Type 1 the resistance R is 1 ohm 2 the emf...
- Q For the circuit shown in the figure R 2R2 When R3 Is Increased from U infinity current through the battery changes from A to 4 A www b 12 R...
- Q 5 x100 20 in a potentiometer circuit the emf of driver cell is 2 V and internal resistance is 0 5 2 The potentiometer wire is 1 m long It...
- Q A i 1 13 Three resistors having resistances r r2 and are connected as shown in the given circuit The iz ratio of currents in terms of resistances used 11...
- Q Paragraph for Question Nos 7 to 9 For the circuit shown in the figure initially capacitor C is uncharged Switch S is closed at t 0 Vo 2R Vo 4R...
- Q If resistance of voltmeter is 40 0 then error in reading of voltmeter is 5n Find the value of n wwww 20 2 Answer 00 www 4002 60 V 01...
- Q For the circuit shown in the figure R 2R When Rs is increased from 0 to infinity current through the battery changes from A to 4 A wwww b 18...
- Q The lengths of the three wires of copper a the ratio of 1 4 8 and their masses are in ratio of 5 3 1 The ratio of their elec...
- Q In the series combination of 18 cells each cell having emf 6 V and internal resistance 2 ohm if three cells are wrongly connected ie their polarity is opposite to...
- Q 5 Two conducting plates A and B are placed parallel to each other A is given a charge Q and B a charge Q The surface charge density at the...
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