Physics question and answers for December 22, 2023
- Q neet prep 402 1 1 V 2 1 5 V 3 V 352 ww 652 Mini Test 9 Combination of Resistors Contact Number 9667591930 8527521 1 PI P2 2 Pites...
- Q 16 A galvanometer has constant 10 A deflection a current of 1 A pass through the coil The area of coil is 0 02 m 2 ad magnetic field of...
- Q In a meter bridge experiment null point is obtained at 40 cm from one end of the wire when resistance X is balanced against another resistance Y If X Y...
- Q c 10 A d 10 A 79 A npn transistor is connected in common emitter configuration in a given amplifier A load resistance of 800 2 is connected in the...
- Q A potential difference of 250 V is applied to a metallic wire at 15 C when a current of 5 A was flowing What wil be temperature of wire when...
- Q 175 If in a p n junction a square input signal of 10 V is applied as shown then the output across R will be 2015 a c 5V A...
- Q A wire of resistance 10 0 ohm is stretched and increases its length by 20 Its resistance then would be Neglect any change in volume or resistivity A 10 0...
- Q 6 A conductor with rectangular cross section has dimensions ax 2a x 4a as shown in figure Resistance across AB is x across CD is y and across EF is...
- Q In a metre bridge circuit as shown when one more resistance of 100 Q is connected in parallel with unknown 4 resistance X then ratio becomes equal to 2 where...
- Q If the voltage across a 25 2 resistor is v 50 sin 500t 75 which of the following is the expression for the resistor current O2 sin 20t 3 O2...
- Q Figure shows a copper wire of nonuniform cross section carrying current toward right for sectors A B and C E A i i i i current C V V V...
- Q A wire of resistance 4 Q is used to wind a coil of radius 7 cm The wire has cross sectional diameter of 1 4 mm and specific resistance of...
- Q 48 A wire of a certain material is stretched slowly by ten percent Its new resistance and specific resistance become respectively 2008 a 1 1 times 1 1 times c...
- Q This question contains Statement 1 and Statement 2 Of the four choices given after the statements choose the one that best describes the two statements STATEMENT 1 For a mass...
- Q 17 Problem 5 Consider the circuit in the diagram with sources of emf listed below Randomized Variables 28 V 43 V 43 3 5V 44 31 V 33 Part a...
- Q In the circuit shown in the figure the magnitude of potential difference between point A and E is 202 10 V 302 1 27 V 3 17 V A ted...
- Q Figure shows a balanced Wheatstone s bridge S 102 B P 100 S2 A R 5Q Q 50 Q C 4100 A If P is slightly increased the current in...
- Q Two batteries A and Bare connected in parallel and a resistance R 10 Q is connected across their terminals A has emf of 12 and internal of 2 Q Bhas...
- Q Two non ideal batteries of emf and 2 2 are connected in parallel Then A Equivalent emf is larger than greater emf B Equivalent internal resistance is larger than either...
- Q Five identical resistors marked a b c d and e are connected in a circuit as shown in the figure The ratio of power dissipated through b to the power...
- Q Two resistors of value 1 kQ and 4 kQ are connected in series across a constant voltage supply of 100 V Now a voltmeter having internal resistance of 12 kQ...
- Q Consider a synchronous generator connected to an infinite bus by two identical parallel transmission lines Constant mechanical input of 1 pu The transient reactance x of the generator 0 1...
- Q The incorrect statement among the followings S For some high resistance alloys like manganin increase in resistance with temperature change is negligible Insulators like rubber and glass are said to...
- Q 22 For the arrangement shown in figure the charge on the 10 F capacitor is 4 F 11 10 V 10 F 20 V 1 300 C 2 200 C...
- Q The circuit shown in the diagram extends to the right into infinity Each battery has the electromotive force V unknown and the internal resistance r known Each resistor has the...
- Q A current is flowing through a cylindrical conductor of radius R such that current density at any cross section is given by J J 1 F where r is radial...
- Q n a metre bridge circuit as shown when one more resistance of 100 Q is connected in parallel with unknown resistance X then ratio becomes equal t 2 where is...
- Q In the circuit shown the value of R in ohm such that there will be no current through 30 V battery is R 30 V 20 Q 30 Q 40...
- Q When the key kis pressed at time t 0 then which of the following statements about the current in the resistor AB of resistance 1 kQ of the given circuit...
- Q With increase in frequency of an a c supply the impedance of an LCR series circuit 1 Remains constant 2 Decreases 3 Increases 4 Decreases at first becomes minimum and...
- Q A B and C bulbs are connected in circuit as shown in diagram B and C are of same type and if bulb C is fused then in comparison to...
- Q An inductor designed with 400 turns coil wound on an iron core of 16 cm cross sectional area and with a cut of an air gap length of 1 mm...
- Q A technician has only two resistance coils By using them singly in series or in parallel he is able to obtain the resistance 3 4 12 and 16 ohms The...
- Q A 500 KVA 440 V synchronous generator is supplying a passive load of 400 kW at 0 8 lagging power factor It has a sub transient reactance of 0 1...
- Q A 33 KVA 2200 220 V 50 Hz single phase transformer has the following parameters Primary winding h v side resistance r 2 4 2 Leakage reactance x 6 002...
- Q 40 Current Electricity 36 The equivalent resistance between A and B in the following network is R 1 R A www 2R wwwwww 2R wwww R 2 www R 7R...
- Q e In given figure if R 30 R 60 R3 90 emf 18V then find currect i through R just after the switch is closed e 18V 1 0 A...
- Q 20 The effective resistance in the given circuit between A and B points is 12 Awwwwwwwww B 1 20 3 8 w 00 29 www a 3 19 www www...
- Q A series circuit contains a resistance R a capacitor CF a coil L H supplied by a 1 c source with e m f EV Derive an expression for the...
- Q In the given circuit diagram when the current reaches steady state in the circuit the charge on the capacitor of capacitance C will be 2 CE 1 1 3 CE...
- Q S B E In producing chlorine by electrolysis 100 kW power How much chlorine at 125 V is being consumed per minute is liberated E C E of chlorine is...
- Q Four identical resistors each of resistance 2 2 are connected to battery of 20 V and internal resistance 22 as given below The reading of ideal ammeter A and A...
- Q A dc source of emf E 100 V and internal resistance r 0 502 a storage battery of emf E 90 V and an external resistance R are connected as...
- Q A 10 V battery with internal resistance 12 and a 15 V battery with internal resistance 0 6 2 are connected in parallel to the voltmeter see figure The reading...
- Q 7 A metallic resistor is connected across a battery If the number of collisions of the free electrons with the lattice is somehow decreased in the resistor for example by...
- Q conductors made of same material is as shown in th figure Then which of the following is correct 1 Js C 2 Js 2 Js F D A E 3...
- Q The circuit shown here has two batteries of 8 0 V and 16 0 V and three resistors 30 92 and 992 and a capacitor 5 0 uF How much...
- Q 5 Four cells each of emf E and internal r are connected in series If polarity of one cell is reversed then the terminal voltage across this cell is Er...
- Q 0 The figure shows 4n cells connected in series to form a loop r is the internal resistance and E is the emf of each cell If polarity of last...
- Q In the figure the voltages are v t 100 cos wt v t 100 cos wt 18 and v3 t 100 os wt 36 The circuit is in sinusoidal steady...
- Q wo wires are made of the same material and have the same length but different radii They e joined end to end and a potential difference is maintained across the...
- Q A nichrome wire is 1 m long and 1 x 10 6 m in cross sectional area When connected to a potential difference of 2 V ome is A 10...
- Q A bimetallic strip consists of metais A and B It is mounted rigidly as shown The metal A has higher coefficient of expansion compared to that of metal B When...
- Q For an ohmic substance the electron drift velocity is proportional to A the cross sectional area of the sample B the length of the sample C the mass of an...
- Q Paragraph for Question Nos 15 to 19 Consider the circuit diagram shown and answer the questions based on it 1 3 1 15 What is the equivalent resistance of the...
- Q 5 A A mixer is operated with 230V of AC supplied with a power rating of 460W for one minute Fin the current flowing through the mixer and the number...
- Q For the circuit arrangement shown in the figure the circuit is switched on and the variable resistance is adjusted such that the bulb just glows Now if the circuit is...
- Q 23 The V graph of a conductor at two different temperatures is shown in figure The ratio of temperature TA and Tis B V 1 tan20 3 sec 0 0...
- Q 22 The resistances in the two arms of the meter bridge are 5 and R 22 respectively When the resistance R is shunted with an equal resistance the new balance...
- Q The resistance of four arms P Q R and S in a Wheat stone s bridge are 5 10 6 and 120 respectively The emf and internal resistance of the...
- Q The mechanical equivalent of heat is 1 cal 4 18 J A heating coil connected to a 120 V source provides 60 000 calories in 10 minutes The current in...
- Q When titrating V and using diphenylamine sulfonic acid E 0 85 V fo the color change indicator which of the following one electron reagents oxidized form should be used as...
- Q the figure a long uniform potentiometer wire AB is having a constant potential gradient along its length The null points for the two primary cells of emfs E and E...
- Q voltage to By increasing the transmission double of its original value the same power can be dispatched keeping the line loss 1 equal to original value 2 3 4 half...
- Q A 69 0 F capacitor is connected to a generator operating at a low frequency The rms voltage of the generator is 3 80 V and is constant A fuse...
- Q of identical 2 A number emf E connected cells n each of resistance internal I in series are charged by a DC source of emf E using a resistor R...
- Q Question 4 NO SOLUTION REQUIRED CONSIDERED AS MULTIPLE CHOICE QUESTION A ring shaped conductor a 0 714 m in radius carries a total charge of Q 580 nC uniformly distributed...
- Q 1 Two cells of emf 2E and E with internal resistance r and r respectively are connected in series to an external resistor R see figure The value of R...
- Q A resistor with resistance 10 MQ is connected in series with capacitor with capacitance 1 0 F and a with emf 12 0 V Before the switch is closed at...
- Q The circuit given below contains five identical resistors The 45V battery delivers 58W of power to the circuit R ww 45 V wwwwww O 2002 O 250 O 300 R...
- Q 44 Find the potential of B point in given circuit 10 V A 1 11 2 F 1 7 5 V 3 5 V 5 VAI B 2 F 2...
- Q 59 Figure shows a network of eight resistors numbered 1 to 8 each equal to 202 connected to a 3V battery of negligible internal resistance The current I in the...
- Q In an experiment to measure the internal resistance of a cell by potentiometer it is found that the balance point is at a length of 2m when the cell is...
- Q A simple potentiometer circuit is shown in the figure The internal resistance of the 4V battery is negligible AB is a uniform wire of length 100 cm and resistance 202...
- Q The input resistance of a silicon transistor is 100 W Base current is changed by 40 uA which results in a change in collector current by 2 mA This transistor...
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