Physics question and answers for January 05, 2024
- Q Aakash Institute ntial 31 3n identical cells each of emf E and internal resistance r are connected in series to form a closed circuit If out of 3n cells n...
- Q To make the resistance 4 5 times of a uniform wire a part of its length was uniformly stretched till the fina length of the entire wire becomes double the...
- Q In the given circuit r and r are the internal resistances of the cells A and B For what value of R the terminal potential difference of cell A is...
- Q For what value of the resistance x the totaegr power developed in the external resistors is maximum 1 0 5 3 0 8 H 12v www r 1 5 www...
- Q In an electrical arrangement as shown the equivalent resistance between X and Y will be A A 150 8 2 X Yo B 750 80 wwww 10092 509 A 750...
- Q In the circuit Fig 2 b 34 E F G and H are cells of e m f 2 1 3 and 1 volt and their internal resis tances are...
- Q ps across 01 2 3 1 1 3 loto 3 2 2 4 lo 1 The density of a piece of a metal of atomic weight 60 is 5 x...
- Q 202 The correct circuit for the determination of internal resistance of a battery by using potentiometer s 1 2 3 4 R 4 www R E R E R wyw...
- Q 2 A galvanometer has resistance 100 It gives full scale deflection on passing 10 mA current through it To convert it into voltmeter of range 0 to 10 V the...
- Q When a particular current flows through a resistance wire a the heat produced will be more if the current is drawn from an AC source b the heat produced will...
- Q A 200 volt electromotive force is applied to an RC series circuit in which the resistance is 1000 ohms and the capacitance is 5 x 10 6 farad A Find...
- Q The figure is made of a uniform wire and represents a regular five pointed star The resistance of section EL is 2 ohm Find the resistance in ohm of the...
- Q 17 points In the figure the values of the resistors are as follows R1 31 S2 R2 10 12 R3 152 V 47 V I 6A What is the voltage...
- Q 42 When the current in the portion of the circuit shown in figure is 3 A and is increasing at the rate 1 A s the measured potential difference Va...
- Q 2 E V V r be V The internal resistance of the cell must be 2 E V r E 1 2 Hint V E IR and V lr calculate...
- Q 15 There are three copper wires of lengths and cross sectional A 1 2 areas L A 2L minimum resistance 2A Which wire has the K SL A a Wire...
- Q Consider the circuit shown Entries in List I are some relations for quantities involved in the circuit Match these relations with the entries in List II 7 List I List...
- Q he heat generated in 50 resistor due to current flowing through it is 10 cal second Heat generated in 4 Q2 resistor in cal s is 452 692 592 ww...
- Q fall branches in the shown network is of resistance R 100 then equivalent resistance between A and B is n Q Find the value of n Answer 20 B O...
- Q the shown figure if resistance between any two junctions is R then equivalent resistance between A and 8 is 10 Find the value of n A Answer 0 01 B...
- Q For the circuit shown in figure the voltmeter reads 1 V and the ammeter reads 1 A On inter changing their places the voltmeter reads 2 V and ammeter reads...
- Q N 9 The length of a potentiometer wire is 1200 cm and it carries a current of 60 mA For a cell of emf 5 V and internal resistance of...
- Q Paragraph for Question Nos 15 and 16 For the circuit shown in figure the voltmeter reads 1 V and the ammeter reads 1 A On inter changing their places the...
- Q 10 To get maximum current through a resistance of 2 5 02 one can use m rows of cells each row having n cells The internal resistance of each cell...
- Q 5 The resistance in the three arms of a Wheatstone bridge are respectively 15 10 0 and 22 5 2 When a copper coil is placed in the fourth arm...
- Q For the circuit shown in figure current in A through switch S when it is closed 302 Q 192 wwww www Answer www 192 www P 30 12 V
- Q Four wires each of same length diameter and material and resistance R are connected to each other to form a square A battery is connected across diagonally opposite vertices of...
- Q A resistor of certain resistance R is able to produce 440 J of thermal energy in 22s When an electric current of 2A is passed through the resistor On increasing...
- Q There is a definite potential difference between the two ends of a potentiometer Two cells are connected in such a way that first time help each other and second time...
- Q In the circuit shown below if the resistance 5 22 develops a heat of 42 J per second heat developed in 2 22 must be about ww 652 202 M...
- Q Please explain the attached question How is Electric field nversely proportional to the cross sectional area a A steady current flows in a metallic conductor of non uniform cross section...
- Q Two cells of equal e m f E b ut of difference internal resistance r and r2 are connected in parallel anc the combination is connected with an external resistance...
- Q In the part of a circuit shown in the figure the potential difference VG VH between points G and H will be Go 4023 1 6 V 2amp 292 4...
- Q For a generator of armature coil resistance 20 Q with load resistance 10 Q current flowing is 5 amp The efficiency of this generator is 33 33 66 66 76...
- Q Consider the circuits shown What will the voltage across R1 look like as a function of time in each of them Hint Think about what it is at t 0...
- Q Q 15 For the given circuit obtain current flowing through resistance R and electric potential at junction 0 www V 15 V R 155 V wwww R 3052 R 4552...
- Q Q 30 A constant current flows through the wire of non uniform area o cross section which of the following will remain constant current density current drift velocity Explain with...
- Q A time varying current I is passed through a resistance R as shown in figure 14 310 lo 40 210 310 Which of the following statements is are correct I...
- Q ter arrangement E is the current in primary circuit cell establishing E is the cell to be measure AB is the potentiometer wire and G is a galvanometer Which of...
- Q copper wire of lengh1 1000 m and cross sectional area A 1 0 mm carries a current 1 4 5 A Find in meya Newton the sum of electric forces...
- Q In an ammeter 0 5 of the main current passes through the galvanometer If the resistan the galvanometer is G calculate the resistance of the shunt in terms of G
- Q closed Then the correct statement is R www w A IfE IR reading of the ammeter is I B If IR E 2IR reading of the ammeter is greater than...
- Q A thin plastic rod is bent so that it is in the shape of a semicircle of radius R 30cm An amount of charge Q 7nC is distributed evenly along...
- Q The graph below show the potentiometer experiment depending on the graph below at what value of Lx the galvanometer current lo become zero LX f O c 30 cm O...
- Q Three ammeters A B and C of resistance RA R and R respectively are joined as shown When some potential difference is applied across the terminals T and T their...
- Q A galvanometer having a resistance of 500 gives a full scale deflection for a current of 0 05A What is the length in metre of a resistance wire of area...
- Q The length of potentiometer wire is Im and its resistance is 492 A current of 5mAis flowing in it An unknown emfis balanced on 40 cm length of this wire...
- Q A galvanometer of resistance 959 shunted by a resistance of 5 ohm gives a deflection of 50 divisions when joined in series with a resistance of 20k2 and a 2...
- Q Four lead acid type of secondary cells each of emf 2 0 V and internal resistance 0 025 are joined in series to provide a supply to a resistan 8...
- Q A battery of e m t E and internal resistance re is connected to a variable resistor R is shown Which one of the following is true E 41 R...
- Q In the potentiometer arrangements shown the driving cell D has emfE and internal resistance r The cell C whose emfis to be measure has emfE 2 and internal resistance 2r...
- Q Assertion A Two electric bulbs of 50 and 100 W are given When connected in series 50 W bulb glows more but when connected parallel 100 W bulb glows more...
- Q An electric current is passe rough a circuit containing two wires of the same material connected in parallel If the length and radii of the wires are in the ratio...
- Q Q 31 State Kirchhoff s laws On what fact these are based by using these laws find the current flowing through each branch of the given circuit A D 1...
- Q please explain corona discharge and dielectric breakdown of air in short simple words protects a person from lightning strikes if he is in a car v Except for spherical surfaces...
- Q density of a piece of a metal of atomic weight 60 are 10 m 1m and 5 x 10 kg m respectively If every atom contributes one free electron and...
- Q The given circuit consists of two ideal batteries two fixed resistances and a variable resistance R Resistance Ris adjusted so that power consumed by it is maximum Choose the correct...
- Q In a potentiometer of 10 wires the balance point for measuring the emf of a cell is obtained on 6th wire To shift the balance point on 8th wire we...
- Q Two identical bulbs and a heater are connected across a source of constant voltage If one of the bulbs fuses then Heater www OPTIONS MARK FOR REVIEW CLEAR SELECTION A...
- Q For the circuit shown in figure potential difference of 12 Vi applied across AB A 192 www C wwwwww 252 E 2925 2525 32 D 202 F 12 12 V...
- Q accelerated we by an electric ted as sOOWD in fig The two stops at the left ensure that the electron beam has a uniform cross I A The speed of...
- Q In a discharge tube the number of proton drifting across any cross section is 1 0x 10 18 per second while the number of electrons drifting in the opposite direction...
- Q 7 A wire of resistance 402 is bent into a square a resistance between opposite corners is 20 b resistance between adjucent corners is 7 50 c resistance between mid...
- Q A resistor R dissipates the power P when connected to a certain generator If a resistor R is put in series with R the power dissipated by R A decrease...
- Q Three resistances are connected to form the sides of triangle ABC The resistance of the side AB is 40 ohm of the side BC is 60 ohm and its side...
- Q 1 When a current of 0 5A is passed through two resistors in series the pd between the ends of the series arrangement is 12 5V On connecting them in...
- Q AB BC and CA are three wires of same cross section and are joined to form a triangle Resistance of the three sides are a b and c respectively Another...
- Q Four conductors of same resistance connected to form a square If the resistance between diagonally opposite corners is 8 ohm the resistance between any two adjacent corners is 1 32...
- Q 5 The resultant resistance of two resistors when connected in series is 9 ohm When they are connected in parallel the resistance is 2 ohm The resistances of these resistors...
- Q 16 When a resistance of 2 ohm is placed across a battery the current is 1A and when the resistance across the terminals is 17 ohm the current is 0...
- Q 2 In a potentiometer experiment a cell produces balance in the wire at 240 cm Balancing length change to 120 cm when a resistance 202 is connected parallel to the...
- Q A 4 Q2 resistor in series with 8Q resistance and they are connected to 12V supply if another resistor of 82 is connected across the 82 resistor the current drawn...
- Q The value of each resistance of the combinations shown in a Fig 2 72 and b Fig 2 73 is r Determine the equiv alent resistance between the points A...
- Q 9 Six resistors each of value 40 are joined together in a cir cuit as shown in Fig 2 74 Calculate equivalent resistance across the points A and B If...
- Q With a uniform potentiometer wire AB of resistance 100 an electric cell of emf 2 V and of negligible inter nal resistance is connected A voltmeter of resistance 360 is...
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