Physics question and answers for December 02, 2023
- Q X is unknown resistance as shown in the potentiometer circuit The length of wire AB is 100 cm When P and Y are connected then balance is obtained at 40...
- Q 0 A galvanometer shows full scale deflection when I mA current passes through it How can t galvanometer be converted into an ammeter to measure a current upto a maximum...
- Q In a circuit instantaneous voltage and c urrent are V 15 sin 314t volt and i 5 cos 314t ampere respectively The nature of circuit and the power dissipated in...
- Q 98060 Pre Medical Physics 51 QUIPOTENTIAL 50 Potential inside a charged spherical shell is 1 uniform WEEN FIELD 2 proportional to the distance from the centre 3 inversely proportional to...
- Q Figure shows a circuit in which three identical diode are used Each diode has forward resistance of 20 2 and infinite backward resistance Resistors R R R3 50 2 Battery...
- Q 11 A cycle wheel with 20 metallic spokes each 1 m long is rotated with speed of 60 rad s in a plane normal to horizontal component of earth s...
- Q 44 In the meter bridge shown negative temperature coefficient of resistance Neglecting the variation in other resistors when current is passed for some time in the cirucit balance point should...
- Q The given potentiometer has its wire of resistance 10 When the sliding contact is in the middle of the potentiometer wire the potential drop across 2 resistor is 20 VIL...
- Q The graph shows variation of v with change in u for a mirror Points plotted above the point P on the curve are for values of v 45 A A...
- Q 24 The resistance of a tungsten filament at 150 C is 133 2 What will be its resistance at 500 C The temperature coefficient of resistance of tungsten is 0...
- Q 8 Two short magnets have equal pole strength but one is twice as long as the other The shorter magnet is placed at 20 cm in tanA position from the...
- Q A galvanometer of resistance 50 0 gives full scale deflection at 3 mA current What should be value of shunt so that it can measure a current of 28 mA...
- Q Read the following text and answer Q53 to Q55 questions on the basis of the same MOVING COIL GALVANOMETER A galvanometer is a device which is used to detect the...
- Q 1 point A resistance of 5 ohms is connected across the gap of a Meter Bridge and an unknown resistance greater than 5 ohms is connected across the other gap...
- Q Please explain each and every option in detail also why fo rth is wrong 1 Choose the correct statement than pervers breakdows vondaryo transforentifier circuit must be sufficiently higher peak...
- Q Obtain the output voltage across the 15k resistance measured with the help of a voltmeter VM having an internal resistance of 30 kQ How much is the percentage loading due...
- Q In a meter bridge the balancing length from the left end standard resistance of two ohm is in the right gap is found to be 40 cm The value of...
- Q A galvanometer of resistance 50 Q gives full scale deflection at 3 mA current What should be value of shunt so that it can measure a current of 28 mA...
- Q Online Mock Test Series for NEET 2020 43 A cell is balanced on a length of 150 cm of a potentiometer wire Now a resistance of 50 is connected in...
- Q In the experiment of calibration of voltmeter a 1 1 V standard cell gets balanced at 440 cm length of wire The balancing length corresponding to a potential difference between...
- Q A moving coil galvanometer of resistance 200 gives a full scale deflection when a current of 1 mA is passed through it It is to be converted into an ammeter...
- Q A galvanometer may be converted into ammeter or voltmeter In which of the following cases the resistance of the device will be largest Assume the maximum range of galvanometer 1...
- Q The r m s value of induced voltage in a coil of 50 turns each of area 30 sq cm rotating at 1000 r p m about an axis at...
- Q 9 A potentiometer wire AB having length L and resistance 12r is joined to a cell D of emfe and internal resistance r A cell C having emf and internal...
- Q 3 Two equal resistances when connected in series to a battery consume electric power of 60 W If these resistances are now connected in parallel combination to the same battery...
- Q A 100 turn closely wound circular coil of radius 10 cm carries a current of 3 2A A uniform horizontal magnetic field of strength 2T is turned on The axis...
- Q In the potentiometer circuit shown in figure the internal resistance of the 6V battery is 102 and length of the wire is 100 cm When AD 60 cm the galvanometer...
- Q A uniform metallic wire has a resistance of 18 2 and is bent into an equilateral triangle Then the resistance between any two vertices of the triangle is JEE Main...
- Q OO hem is first calculated assum point like charges a ing them t th Two charged spheres are kept at a finite centre to centre spacing as shown in the...
- Q 46 The circuit shown in figure employs a constant current source of 8 A which alway maintains the current through a load by varying its emf The value of R...
- Q A moving coil galvanometer of resistance 20 gives a full scale deflection when a current of 1 mA is passed through it It is to be converted into an ammeter...
- Q Moving Charges and Magnetism a 210 mA c 420 mA 92 In the given circuit a galvanometer with a resistance of 70 2 is converted to an ammeter by a...
- Q 5 The mean length of an object is 5 cm Which of the following measurements is most accurate A 4 553 cm C 4 9 cm B 5 22 cm...
- Q 21 In the lead storage battery 1 a reversible reaction can occur to recharge the battery 2 lead is oxidized to create a flow of electrons 3 lead forms the...
- Q Under the influence of a uniform magnetic field a charged particle moves with a constant speed v in a circle of radius R The time period of rotation of the...
- Q To make a voltmeter from a galvanometer which the following is required A A high resistance is a connected in parallel B A high resistance is connected in series C...
- Q In the circuit diagram given below AB is a uni form wire of resistance 15 ohm and length one metre It is connected to a series arrangement of cell of...
- Q When a resistance of 20 is connected across a 32 cell a current of 0 5 amp flows If the resistance is increased to 50 the current increases to 0...
- Q A milliammeter of resistance 5 ohm gives a full scale deflection for a current of 15 mA If the milliammeter is to be used to measure current upto 1 5...
- Q Galvanometer G having full scale deflection current lg and resistance R is use in combination with resistances to form an ammeter whose range i is given in Column II Match...
- Q A B and C are voltmeters of resistance R 1 5R and 3R respectively as shown in the figure When some potential difference is applied between X and Y the...
- Q Consider a thin permanently interface of magnetic medium of permeability and vacuum If the magnetic medium near a point on the interface makes an angle with the normal to the...
- Q 31 If only 51 through a galvanometer then the shunt 1th required is R and if only of the main 11 voltage is to be developed across the galvanometer then...
- Q Q No 16 To increase the current sensitivity of a moving coil galvanometer we should 1 3 4 decrease number of turns in coil decrease area of cross section of...
- Q End corrections in a meter bridge arise due to extra resistances at the two ends of the wire If the end corrections in both ends of a meter bridge are...
- Q of e m f E is connected to a resistance R for time t and the amount of heat generated in it is H If the resistance R is replaced...
- Q Fig of Q 45 54 21 4 51 PM A DUPL E E Mark only one oval wwww R www i When the key K is open how does the...
- Q To draw the reverse characteristics of a zener diode and to study its voltage regulation characteristics using a variable load Breakdown region should be identified in the graph Percentage voltage...
- Q 94 In a potentiometer of 10 wires the balance point is obtained on the 7th wire To shift the balance point to 9th wire we should a decrease resistance in...
- Q In a NPN transistor common emitter mode 1010 electrons enter the emitter in 1 s Only 1 of electrons are lost in the base what will be collector current 1...
- Q EXAMPLE 2 14 A 502 loss less transmission line is connected to a load of 50 j50 2 The maximum voltage measured on the line is 50 V Find the...
- Q 200 T At t 0 particle decays into 3 A neutral particle of mass 28g is at rest in a uniform magnetic field B two particle of equal mass and...
- Q 6 The pieces of Aluminium and Silicon are placed in closed room at 280 K temperature then which of the following statement is corrent Initial temperature is 300 K A...
- Q 15 In the following question choose proper pairs from Column 1 and Column 2 Column 1 Column 2 a b c d Zener Diode Photo Diode LED Solar cell A...
- Q a 0 88 A 3A galvanometer having a resistance of 50 2 gives a full scale deflection for a current of 0 05 A The length in metres of a...
- Q A galvanometer of resistance 70 2 is converted to an ammeter by a shunt resistance r 0 03 2 The value of its resistance will become a 0 025 92...
- Q A micrometer has a resistance of 1000 and a full scale range of 50 A It can be used as a voltmeter or a higher range ammeter provided a resistance...
- Q 00 A potentiometer wire of length 100 cm has a resistance of 10 2 It is connected in series with a resistance and a cell of emf 2 V and...
- Q 98 In a potentiometer the balancing with a cell at length of 220 cm On shunting the cell with resistance of 3 22 balance length becomes 130 What is the...
- Q The following set of figures shows components of a mechanical system in figure 1 and assembled system in figure 2 There are two small balls of mass m and 2m...
- Q mtG Objective NCERT P 44 Combine three resistors 5 2 4 5 92 and 3 22 in sach a way that the total resistance of this combinations a 12 52...
- Q 23 The output characteristics of a transistor is shown in the figure When VCE is 10 V and le 4 0 mA then value of Bac is lc in ma...
- Q Let there be a spherically symmetric charge distribution with charge density varying as p r P uptor R and p r 0 for r R where r is the distance...
- Q In the circuit shown the reading of the ammeter ideal is the same with both switches open as with both closed find the value of resistance R in ohm 10092...
- Q Consider the protection system shown in figure below The circuit breakers numbered from 1 to 7 are of identical type A single line to ground fault with zero fault impedance...
- Q The figure shows a two generator system applying a load of PD 40 MW connected at bus 2 G Bus 1 PG1 Bus 2 testbook PD 40MW The fuel cost...
- Q 1 A potentiometer is connected across A and B balance is obtained at 64 0 cm When potenti lead to B is moved to C a balance is found cm...
- Q 19 A common emitter amplifier circuit is shown in the figure below For the transistor used in the circuit the current amplification factor B 100 Other parameters are mentioned in...
- Q 17 06 2021 Sr Super60 All Jee Adv 2019 P1 GTA ci angos V and V oro put in the left hand and right hand gone in ya IIT Academy...
- Q A cell of constant e m f is first connected to a resistance R and then connected to a resistance R If power delivered in both cases is equal then...
- Q In the shown arrangement of a meter bridge distance of galvanometer jockey on wire AB from A corresponding to null deflection of the galvanometer is x What would be its...
- Q an ini speed v ap Three charges 0 1 coulomb each are placed on the corners of an equilateral triangle of side 1 m If the energy is supplied to...
- Q The symbolic representation of four logic gates are given below 2009 1 ii iii TII Do a iv i iii c i ii iv O iv The logic symbols for...
- Q 3 16 Pote In a potentiometer of 10 wires the balance point is obtained on the 7th wire To shift the balance point to 9th wire we should C a...
- Q Q 7 Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm respectively and resistance 8 each They are connected in parallel with a cell...
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