Physics question and answers for December 30, 2023
- Q In the circuit element given here if the potential B at point B V 0 then the potentials of A and D are given as 1 502 2 502 wwwww...
- Q A conducting rod is moving with a constant velocity v over the parallel conducting rails which are connected at the ends through a resistor R and capacitor C as shown...
- Q As shown in the figure the emf of the cell is 5 V and the internal resistance of the cell is zero The reading of the ideal voltmeter is 5...
- Q Using a long extension cord in which each conductor has a resistance 80 a bulb marked as 100 W 220 W is connected to a 220 V dc supply of...
- Q In the circuit shown in the figure the resistance marked R can be varied by using a Rheostat The power across the 5 2 resistor will be maximum if the...
- Q 6 A frustum of cone having radii 5 m and 2 m of its plane surfaces is kept in a uniform electric field 5 N C perpendicular to the plane...
- Q charges Q and each face of plate A 40 Krop 368 as shown in the figure is Area of 2 32 0 4 8 Q LAE Q O N Q...
- Q 20 Among the circuits as shown in the glow intensity of any individual bulb will be minimum in assume all cells to be identical and ideal all bulbs to be...
- Q A part of a large circuit is shown The values of resistance inductance and capacitance are indicated here Which of the statement s are correct A The charge on the...
- Q Two bulbs consume same energy when operated at 200 V and 300 V respectively when these bulbs are connected in series across a DC source of 500V then A B...
- Q A battery of e m f 2 volts and internal resistance 0 10 is being charged with a current of 5 A Calculate the potential difference between the terminals of...
- Q here R3 increased then what will happen 41 In the circuit shown R is increased What happens to the reading of the voltmeter ideal V R www R3 www R...
- Q If a certain piece of copper is to be shaped into a conductor of minimum resistance its length L and cross sectional area A shall respectively be a L 2A...
- Q L The figure shows a simple series circuit of R and R connected to 100 V dc source If the voltag across R is to be measured by voltmeter having...
- Q A ring of radius R and mass M has charge q uniformly distributed on it It rotate with angular velocity w The magnetic moment of the ring will be O...
- Q An ideal inductor is connected in series with a resistor and an ideal battery The battery supplies energy at a rate P t the resistor dissipates energy at a rate...
- Q 90 Given R 102 R 202 C 2 F C 4 F The time constants in us for the circuits I II III are respectively ver R R 20 www...
- Q In the circuit shown in figure reading of voltmeter is V when only S is closed reading of voltmeter is V when only S is closed and reading of voltmeter...
- Q A cell of internal resistance 102 is connected across a resistor R A voltmeter having variable resistance is used to measure the potential difference across the resistor The plot of...
- Q 29 A resistance wire connected in the left gap c a metre bridge balances a 10 resistance i the right gap at a point which divides th bridge wire in...
- Q In step up transformer relation between number of turns in primary coils Np and number of turns in secondary coils Ns are related as ONS Np Np Ns Ns Np...
- Q The turns ratio Ng Np of an ideal transformer is given as 2 3 If the current passing through the primary coil is 3 A the current in secondary coil...
- Q 9 Voltmeters v and v are connected in series across a d c line v reads 80 V and has a per volt resistance of 200 2 v has a...
- Q The potential difference between points A and B as shown in the given circuit will be 292 2923 A 292 292 wwww wwwwww 10 v V 20 HH 10 V...
- Q Figure shows graph between and V for two conducto and B Their respective resistances are in the ratio I A 60 1306 1 2 3 1 B 2 1 A...
- Q Sir plz tell whats wrong in this 35 Seven identical cells each of e m f E and internal resistance r are connected as shown The potential difference between A...
- Q The current through the 50 resistance connected across Al as shown in the given circuit is B 202 A 592 2 A 8 V 1 A wwwww 0 5 A...
- Q A piece of wire is cut into three equal parts and these pieces are kept together side by side to form a thicker wire Compared to that of the original...
- Q Three electric bulbs whose resistance are in the ratio of 1 2 3 are connected in parallel to a constant voltage source The power dissipated in them has the ratio...
- Q In the circuit as shown V V V The resistance of each wire AB AC etc are shown E in the figure Select correct option s A current in AC...
- Q The ammeter A reads 4 A and the voltmeter Vreads 46 V The value of resistance Ris Assuming finite value of resistance of ammeter and voltmeter O Exactly 10 ohm...
- Q E E 3 E4 E3 E E 4 E4 E3 E E 32 A part of the circuit is as shown in figure The current in 2 Q2 branch is...
- Q In the potentiometer arrangement figure the driving cell A has emf and internal resistance r The emf of the cell B is to be rechecked has emf and internal resistance...
- Q The length of a potentiometer wire is 10 m The distance between the null points on its wire corresponding of two cells comes out to 60 cm If the difference...
- Q 4 When a 20 12 resistor is connected in parallel with a moving coil galvanometer then its deflection reduces from 75 divisions to 25 division then the resistance of galvanometer...
- Q Three voltmeters are connected as shown 1 B A potential difference has been applied between A and B On closing the switch S select the wrong statement s A voltmeters...
- Q In the circuit shown in figure 17 Q18 A Current through R is zero if R 20 and B 402 In this case select incorrect option s A current though...
- Q Voltmeter reads the potential difference across the terminals of an old battery as 1 40 V while a potentiometer reads its voltage to be 1 55 V The voltmeter resistance...
- Q The current i in a wire changes with time according to the law i iosin nt The total charge in magnitude crossing through a cross section in the time interval...
- Q In the adjoining diagram at steady state choose the correct option s A the current through the branch CB is 4 amp B the current through the branch CB is...
- Q iron wire having length I and area of cross s ection A has resistance of 5 ohm if without charge the temperature the length is double of this wire and...
- Q When a galvanometer is shunted by a resistance S its current capacity increases n times If the same galvanometer is shunted by another resistance S its current capacity will increase...
- Q A cell of emf and internal resistance r is connected to an external resistance R Efficiency of the power supplied by cell increases to double when R resistance changes from...
- Q Four resistors two inductors and an ideal battery are connected in a circuit with the help of three switches S S and S3 as shown in figure Initially switch S...
- Q 1 0 4 V 3 0 2 V 28 Current is carried in a wire of length L If th wire is turned into a circular coil The maximu magnitude...
- Q 23 Figure 3 34 shows a potentiometer circuit for comparison of two resistances The balance point with a standard resistor R 10 0 2 is found to be 58 3...
- Q 9 In the figure the voltmeter shows reading of 20 V The battery has a voltage of U 100 V no internal resistance Find the ratio of the current going...
- Q 18 Two ideal voltmeters an ideal ammeter are connected as shown The battery is non ideal Find the correct plot of A vs x V vs x V vs x...
- Q 107 If the rheostat slider were extreme right to the far left How will the reading of voltmeter V change di V rheostat 1 First increase and then decrease 2...
- Q 50 The force exerted by the conductor AB on the loop CDFG shown in figure is 1 8 x 104 N attraction 2 7 2 x 104 N attraction 3...
- Q 105 Two wires have their lengths diameters and resistivities all in the ratio of 1 2 If the resistance of the thinner wire is 10 92 then the resistance of...
- Q Two cells of the same emf e but different internal resistances r ry are connected in series with an external resistance R I Column I 1 value of current through...
- Q 3 9 V 4 12 V The current capacity of a fuse wire will not depend on 1 Area of cross section of the wire 2 Material of wire 3...
- Q 1 A cell E of emf 6 V and internal resistance 202 is connected in opposition as shown in figure with a cell E of emf 4 V and internal...
- Q 3 A battery of internal resistance 402 is connected to the network of resistances as shown in figure In order that the maximum power can be delivered to the network...
- Q 10 Consider a cylindrical element as shown in the figure Current flowing the through element is I and resistivity of material of the cylinder is r Choose the correct option...
- Q In a mixed grouping of cells there are m identical cells in a row and there are n such rows Each cell is having emf E and internal resistance r...
- Q density and Electric field Drift of electrons and the origin of resistivity Temperature dependence of resistivity istivity Paragraph for Question Nos 7 to 9 Consider a cylindrical resistor It is...
- Q 1 4 nswer 4 ver 2 correct 1154 K 1100 K 1400 K 1127 K Bookmark List Q No 1 Question The retarding potential for having zero photo electric current...
- Q 15 In the circuit diagram shown a large number of resistors are connected Using the value of resistances indicated in the figure find the equivalent resistance between terminals A and...
- Q a large building there are 15 bulbs of 40 W 5 bulbs of 100 W 5 fans of 80 W and 1 heater of 1 kW The voltage of the...
- Q 2 2 figure 8 V 4 V and R 50 If the potential difference between points band a is measured to be 5 V then the value of the resistance...
- Q 3 R nr Two sources of equal EMF are connected external resistance R The internal resistances the two sources are 19 and 2 9 If the potent difference across the...
- Q city 31 In the situation shown resistances R R and R are in the ratio 3 2 1 then PEKAN PEN h R www www www R www R TH...
- Q The ammeter A reads 4 A and the voltmeter reads 40 V The value of resistance R is Assuming finite value of resistance of ammeter and voltmeter 3A A www...
- Q galvanometer having a coil resistance of 100 Q gives a full scale deflection when a current of 1 mA is passed through it The value of the resistance which can...
- Q A vertical ring of radius r and resistance R falls vertically It is in contact with two vertical rails which are joined at the top The rails are without friction...
- Q A galvanometer having a coil resistance of 100 gives a full scale deflection when a current of 1 mA is passed through it The value of the resistance which can...
- Q 19 The circuit diagram given below shows the combination of three resistors R R and R3 4Q wwww R Find 1 total resistance of the circuit ii total current flowing...
- Q A6 V battery of negligible internal resistance is connected across a uniform wire AB of length 100 cm The positive terminal of another battery of emf 4 V and internal...
- Q Two wires A and B of the same material and mass have their lengths in the ratio of 2 3 The same potential difference is applied across each of the...
- Q 1 Improper designing or calibration 2 Zero error 3 External conditions 4 Both 1 2 For two resistors R and R connected in parallel the relative error in their equivalent...
- Q The reactance of the coil is 10 2 and its resistance is 10 Q2 It is connected to an A C source of e m f 220 V The peak...
- Q 2 A 6 V battery is connected to the terminals of 3 m long wire of uniform thickness and resistance of 100 2 Then the potential difference between two points...
- Q The internal resistance of a cell of emf 2v is 0 122 It is connected to a resistance of 3 90 The voltage across the cell will be a 0...
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