Physics question and answers for December 17, 2023
- Q A resistance R and a nonlinear device D are connected with an ideal battery as shown in the given network Current I through the nonlinear device varies with voltage V...
- Q Example 3 37 Find the current drawn from a cell of emf 2 and internal resistance 2 connected to the network given below D 122 12 tr ww 12 O...
- Q The resistances of the four arms P Q R and Sin a Wheatstone bridge are 10 ohms 30 ohms 30 ohms and 90 ohms respectively The e m f an...
- Q The equivalent resistance between points A and J and current I in the following circuit will be 552 652 15V I 1 1592 0 5A B E J 31202 F...
- Q A galvanom er of resistance G is shunted by a resistance S ohm To keep the main current in the circuit unchanged the resistance to be put in series with...
- Q of the potentiometer wire What is the In the circuit shown the ammeter reads 2 A and the voltmeter reads 4 V Find the emf E and the resistance R...
- Q 20 Four resistances are connected by an ideal battery of emf 50 volt as shown in figure circuit is in steady state then the current in wire AB is 192...
- Q In the given circuit calculate potential difference between A and B D A 2V 2V 20 303 x SHH 303 BU 4V SQ
- Q 47 Four identical electrical lamps are labelled 1 5V 0 5A which describes the condition necessary for them to operate at normal brightness A 12V battery of negligible interval resistance...
- Q In the circuit shown the current thr same before and after connecting E is 62 www 1 12 V F 12 V 89 ww rough E The value of E...
- Q Five identical lamps each of resistance R 1100 2 are connected to 220 V as shown in figure The reading of ideal ammeter A is 220 V 1 A A...
- Q Resistance of wire AB is 2000 and resistance of voltmeter is 1500 2 If sliding contact is in the middle of wire AB then reading of voltmeter will be 16Volt...
- Q Each resistance in the given cubical network has resistance of 122 and equivalent resistance between A and B is 1 A 22 www 5 C 1 22 CO www B...
- Q In mixed grouping of cells for maximum current ER A R m nr nr m C mR nr D R r
- Q 2 Find the velocity of charge leading to 1 A current which flows in a copper conductor of cross section 1cm and length 10 km Free electron density of copper...
- Q 158 What will be the equivalent resistance of circuit shown in figure between two points A and D CBSE AIPMT 1996 3 10 2 A WWW 2 4 C wwwww...
- Q PARAGRAPH FOR QUESTIONS 92 93 A car battery with a 12V e m f and an internal resistance of 0 04 is being charged with a current of 50A 580...
- Q In the circuit shown determine the magnitude of potential difference between A and D 292 www T10 V 1 5 V 3 20 V 302 A 192 www B 4V...
- Q the figure A 4V potentiometer is used for determination of internal resistance of a 2 5 V cell The balance point of cell in open circuit is 75 cm when...
- Q The value of the resistor R needed in the dc voltage regulator circuit shown here equals A Vi VL nIL V V n 1 IL C B V VL nIL...
- Q In the given circuit when the switch is shifted from position 1 to position 2 find the total heat dissipated in the resistors 10 V K 10 Q2 2 i...
- Q Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference...
- Q per The number of protons falling on earth s surface unit area per unit time is 1500 If the radius of the earth is 6 4 106 meters the current...
- Q 10V 652 2522 3V 3 F HH 100 20V B C Find the change on 3uF capacitor initially it was zero A 6 F B 30 F C 81uF D...
- Q 150 Two batteries one of emf 18 volts and internal resistance 2 2 and the other of emf 12 volts and resistance 1 n are connected as shown The voltmeter...
- Q 1 65 A non conducting sphere of radius R has a positive charge which is distributed over its volume with density p Po 1 1 R per unit volume where...
- Q An electric iron is rated 220 V 2 kW 2018 If the iron is used for 3h daily find the cost of running it for one week if it costs...
- Q Kened in the figure shown R is a fixed conducting ring of negligible resistance and radius a PQ is a uniform rod of resistance r It is hinged at the...
- Q 4 Reading of A and A are respectively 202 202 2 52 www www A www 2 52 www 352 v 18v www 252 1 2A 1A 2 BO www...
- Q In the given circuit diagram the potential difference between A and B is 1 3 V 3 6 1 F 1 6V A 19 4 1 12 20 3 V...
- Q 36 Eleven identical wire each of resistance R are connected as shown in the figure The equivalent resistance between the points A and B is 1 7R 12 ZR A...
- Q The scale of galvanometer is divided into 150 equal divisions The galvanometer has the current sensitiv ity of 10 divisions per mA and the voltage sensitivity of 2 divisions per...
- Q 33 Two cells having the same emf are k connected in series through an external resistance R Cells have internal resistances and 2 2 respectively When the circuit is closed...
- Q 10 For the combination of resistors shown in Fig 8 30 find the equivalent resistance between the points a C and D and b A and B C R 302...
- Q Current in the network shown in figure is 1 1 A 2 0 5 A 3 2 A 4 5 A 42 www 16 2 10 V www 222
- Q PA 0 50 wwww A 3 2 volt C 1 0 volt How 352 wwww 19 N 0 50 In the circuit shown the current through the 4 ohm resistor...
- Q A battery consists of 50 cells each of emf 2V and internal resistance 0 202 A variable resistance R is connected to the positive terminal of the battery and the...
- Q A potential difference of 200 volt is applied to a coil at a temperature of 15 C and the current is A being the same as before temperature coefficient of...
- Q 204 The reading of the ideal voltmeter in the adjoining diagram will be B 10 V 10 92 ww 20 92 4 V HH b 8 V d 14 V...
- Q In the circuit shown the effective resistance between the points a and bis 352 2322 202 1 1 5 2 3 25 0 60 4022 6N ww 32 2 652...
- Q The potential difference VA VB between point A and B in the network shown is 4 A 1 1 V 3 4 V 29 A 12 wwwwwww www 1922 B...
- Q In the infinite ladder network shown below if R 1 235 then the effective resistance between the points a and b approximately is 5 2 235 R aww be 1...
- Q Section A Q 1 A 25 w 220 v bulb and 100 w 220 v bulb are joined in series and connected 1 to mains which bulb will glow brighter...
- Q Calculate the currents through each resistance in the given circuit Also calculate the potential difference between points a and b 6 V 52 a A www b 102 10 V...
- Q Four resistors are connected in a square formation Two batteries of emf E and 2E are connected along the diagonals as shown in the figure The current flowing in the...
- Q A two way switch S is used in the circuit shown in the figure First the capacitor is charged by putting the switch in position 1 Calculate heat generated across...
- Q 4ed 27 In the circuit shown the ratio 2 is equal to 402 ww 5 V I 1923 1 1 1 3 4 3 322 12 89 322 5 4...
- Q 50 A small town with a demand of 800 kW of electric power at 220 V is situated 15 km away from an electric plant generating power at 440 V...
- Q You have been provided with four 400 ohm resistors each The number of ways in which these can be combined to have different equivalent resistances is a seven different combinations...
- Q a 3 If the length of the filament of a heater is reduce by 10 the power of the heater will Increase by about 9 Increase by about 11 Increase...
- Q 5 In the given circuit the reading of voltmete shown in the figure is 7 V 1 4 V 600 22 www V 1200 S2 A 300 2 2 14...
- Q In the given circuit AB is a uniform wire of 102 and length 1 m It is connected to series arrangement R 100 O G B of cell of e...
- Q All the resistors of the circuit in the figure have same resistance RS The current through the resistor AB is I V A C 6 R 6 V 7 R...
- Q A uniform wire of resistance 3652 is bent in the form of a circle The effective resistance between A and B is O is the centre of circle 0 130...
- Q 70 The potential difference between the terminals of a cell is found to be 3 volts when it is connected to a resistance of value equal to its internal resistance...
- Q 2 The effective resistance between B and C of letter A containing resistances as shown in Fig 2 24 is qnbsite 1092 www 1092 A www m 1002 www 10...
- Q About internal resistance of a cell the correct statement is that it is 1 Constant for a given cell 2 Infinite 3 Finite and its value decreases with increase of...
- Q 27 Figure shows n batteries connected to form a circuit The resistance denote the internal resistance of the batteries which are related to the emf as r KE where k...
- Q In the given circuit the ammeter A and A are ideal and the ammeter A3 has a resistance of 1 9 10 2 If 2n sum of readings of all...
- Q 38 In the given circuit diagram the potential difference between A and B is HFW 192 6 V 1 3 V 3 6 V A 292 FM 3V 2 5...
- Q 71 A current of 2 A is flowing through a cell of e m f 5 V and internal resistance 0 5 22 from negative to positive electrode If the...
- Q 3 An electric bell has a resistance of 502 and requires a current of 0 25 A to work it Assuming that the resistance of the bell wire is 192...
- Q For different values of resistance R power consumptions in R are given Then which of the following values are not possible 4 V ww 19 sam R a 2 W...
- Q Two resistances r and r r are joined parallel The equivalent resistance R is such tha
- Q What is the ratio of the readings of the ammeter A and A2 in the twork shown below 20 2 E 15 V 10 Q 50 4 3 S 3...
- Q In the given circuit if power rating of heater is 1000 Watt at 100 Volt find the resistance R in figure so that heater produces power of 62 5 W...
- Q 21 A cylindrical wire is compressed in length by 10 The percentage decrease in the resistance will be a 16 c 20 b 19 d 25
- Q CE0071 In the following circuit if V V 4 V then the 5 value of resistance X in ohms will be B 77 1 5 5 2 10 3 15...
- Q ork shown the resistance between two adjacent junctions is R Equivalent resistance between point a and b is 1 3 7R 6 7R FR R R R R R a...
- Q Twelve identical resistors are arranged on all edges of a cube Then find the equivalent resistance between the corners 1 and 6 as shown in Fig 5 126 use nodal...
- Q 47 If each resistance in the fig is of 9 22 then reading of the ammeter is H 9 VT wwwwww Fwww www www www wwwww wwwww 121 2 A...
- Q Find the equivalent resistance between A and B in the following circuit 10 22 A www 52 592 1092 592 10922 ww 50 B 10 22
- Q 14 An electrical network is formed by two hexagon and joining grid points with wires The resistance of each side and the connecting wires is R An ideal battery of...
- Q The given infinite grid consists of hexagonal cells of six resistors each of resistance R Then R R 1 1 2 2R 2 3 4R 3 3R 4
- Q comes out at The current enters at A D Some of the resistances are shown What should be resistance of wrie CB so that it draws double of the current...
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