Physics question and answers for December 01, 2023
- Q 3 In a potentiometer experiment a wire AB of length 1 2 m is used For the circuit shown the current through galvanometer becomes zero when the jockey is touched...
- Q A B C D he output of the given circuit in figure Um sin ot O would be zero at all times would be like a half wave rectifier with...
- Q P Q lz If we now interchange the positions of galvanometer and cell will the bridge work If yes what will be balance condition l l l 1 yes Ql...
- Q or Example 23 27 Resistance of a milliammeter is R of an ammeter is R of a voltmeter is R and of a kilovoltmeter is R Find the correct order...
- Q 3 399 10 ms 1 1 When a potential difference of 1 5 V is applied across a wire of length 0 2 m and area of cross section 0...
- Q a meter bridge experiment the circuit diagram and the corresponding observation table are shown in figure 2019 SI NO I cm 1 2 3 4 R Q 1000 100 10...
- Q n given circuit determine I I and I 1 2 km k2 10 V 14 k 12 k 14
- Q The length of a wire of a potentiometer is 100 cm and the emf of its standard cell is E volts It is employed to measure the e m f...
- Q paramagnetic sample shows a net magnetization of 8 Am when placed in external magnetic field of 0 6 T at a temperature of 4K When the same sam placed in...
- Q The input signal giver TU voltage gain of 150 is V 2cos 15t 3 corresponding output signal will be 1 300 cos 15t 2 300 cos 15t 5 3 3...
- Q x Find the value of resistances for the following colour code 1 Blue Green Red Gold Ans 6 5 k2 5 2 Brown Black Red Silver Ans 1 0 k2...
- Q A resistance of R2 draws a current from a potentiometer The potentiometer has a total resistance Ro 2 Figure A voltage V is supplied to the potentiometer Derive an expression...
- Q 3 7 with S 9 The resistances in two arms of a metre bridge are R 502 and S respectively When the resistance S is shunted with an equal resistance...
- Q In a common emitter transistor amplifier the audio signal voltage across the collector is 3V The resistance of collector is 3 k If current gain is 100 and the base...
- Q The resistance of a potentiometer wire is 82 and its length is 8 m A resistance box and a 2 V battery are connected in series with it What should...
- Q The output across the diode in the given circuit in figure V sincot ww R 1 Would be zero at all times 2 Would be like a half wave rectifier...
- Q 16 A dip circle is placed perpendicular to the magnetic meridian then the magnetic needle will align 1 Horizontally 3 In the direction of earth s magnetic field 17 At...
- Q In a potentiometer experiment it is found that no current passes through the galvanometer when the terminals of the cell are connected across 125 cms of the potentiometer wire On...
- Q 10V IMQ ww VR BE R 4k www CE NCE T10V 3 2 7 00 V 4 6 00 V y In the given circuit VBE 0 7 V and...
- Q Example A A D 12 1 222 www www 692 20 V 8 V C 22 www G IG 0 11 B ES alqmex3 Pr Fig 23 83 In the...
- Q 32 The reading of the ammeter in the circuit below is 222 22 wwwwwwwww 1 5 A 2 15 A 3 20 A 22 www 22 wwww 20 V 222...
- Q 56 Consider the potentiometer circuit arranged as in figure 32 E29 The potentiometer wire is 600 cm long a At what distance from the point A should the jockey touch...
- Q Example 23 31 When the switch is open in lowermost loop of a potentiometer the balance point length is 60 cm When the switch is closed with a known resistance...
- Q W 4 The output of the given circuit ww V sinot m 1 Would be zero at all times 2 Would be like half wave rectifier with positive cycle in...
- Q VT 70 V V 26 V R IT R R 25 Q IT A V Given the circuit above solve for IT Round your answer to the nearest 0 1...
- Q Camille takes her pocket calculator out of her book bag as she gets ready to do her physics homework In the calculator a 0 208 C charge encounters 15 2...
- Q 3 Use Superposition to determine the current through the 4 ohm resistor below B21202 480
- Q 3 A series combination of two resistors 6 0 Q and 10 0 Q is connected to a 9 00 V battery a Calculate the total resistance of the circuit...
- Q Valerie s 209 W flat iron is plugged into a 120 V line in her bedroom What is the resistance of the flat iron when it is heated Don t...
- Q V broadcast antennas are the tallest artificial structures on Earth In 1987 a 74 kg physicist placed himself and 384 kg of quipment at the top of a 666 m...
- Q A plug-in transformer supplies 9.00 V to a video game system.(a) How many turns are in its secondary coil if its input voltage is 120 V and the primary coil...
- Q A clamp on ammeter is clamped on all three wires of a 120 volt circuit that is drawing 9.68 amps. What will the ammeter read as the total amperage?Select one:a....
- Q In working of moving coil galvanometer (select the correct alternatives)Eddy current help in achieving equilibrium of coil faster.Cylindrical soft iron core helps in make magnetic field radial & increasing strength...
- Q should have an inductance of 1 5H 3 1 1H 49 In a series L C R circuit R 2000 and the 2 2H 4 1 35H and the frequency...
- Q 56 If the ratio of number of turns in the primary and secondary coil of a transformer is 1 5 and an alternating emf e 100 V sin 100nt is...
- Q Electromagnetic Induction 48 A uniform but time varying magnetic field B t exist 51 in a cylindrical region of radius a and is directed into in the plane of the...
- Q 3 47 As shown in figure a conducting circular loop of radius a placed in a uniform perpendicular magnetic field B A metal rod OA is pivoted at centre O...
- Q 59 A rectangular loop with a side wire of length I is kept in uniform magnetic field as shown in figure The Resistance of slider is R Neglecting self inductance...
- Q a 3 b 4 47 As shown in figure a conducting circular loop of radius a placed in a uniform perpendicular magnetic field B A metal rod OA is pivoted...
- Q 6 A rod of length I and resistance r rotates about one eta end as shown in figure Its other end conducting ring of negligible resistance A resistance R is...
- Q The magnetic flux through a coil of resistance 100 varies as in weber 10t 5 The current in the circuit is zero at 1 t 2 unit 3 t 4...
- Q he he 58 The network shown in the figure is a part of a complete circuit If at a certain instant the current i is 5A and is decreasing at...
- Q 32 A straight conductor of length 2 0 m is moving with speed 2 m s perpendicular to a uniform magnetic field of induction 1 0 T The induced emf...
- Q 39 A circular coil of 500 turns of wire has an enclosed area of 0 1m2 per turn It is kept with its plane perpendicular to a magnetic field of...
- Q 4 Anti clockwise and decreasing with time 55 The magnetic flux through a coil kept in a magnetic field perpendicular to its plane and directed into the paper is varying...
- Q Electromagnetic Induction 7 In the given figure shown below a conducting circular loop of radius I is placed in a uniform and perpendicular magnetic field B A metal rod OA...
- Q The ratio of initial and final steady state current of the circuit is E R r 0 t 0 oooooo R E emf r 2 R r
- Q Electromagnetic Induction y 30 The maximum mutual inductance of the two coils is s 8 H One of the coil has a self inductance of 16 H Then the self...
- Q projection 27 A closed conducting loop is moved with acceleration as shown in the figure The induced current in the loop will be Q Telegram n 1 Clockwise and increasing...
- Q 4 B to A and C to D 38 Two parallel wires AL and BM placed horizontally at a distance W are connected by a resistor R and placed in...
- Q 35 An inductor L 100 mH a resistor R 100 2 and a battery E 100 volt are initially connected in series as shown in figure After a long time...
- Q 1 A current carrying straight conductor of infinite length is placed at distance x from a rectangular conducting loop having side length a and b The mutual inductance of the...
- Q A closed circular loop of radius 10 cm is placed in a region which contains a non uniform but constant magnetic field directed into the plane of the loop The...
- Q If the peak alternating current in a circuit is 21 2 A find out the reading of an ammeter connected in the circuit Ans 15 A The roltage
- Q uniform magnetic field in the positive z rection passes through a circular wire Dop of radius 1 cm and resistance 12 ing in the xy plane The field strength is...
- Q In the circuit shown R W 1 E the switch S is closed at time t 0 and the switch S is kept open At some later time t the...
- Q The network shown in the figure is part of a complete circuit If at a certain instant the current is 6 A and it is decreasing at a rate of...
- Q A thin hollow cylinder of radius a is surrounded co axially by another hollow cylinder of radius b where b a Both the cylinders form part of an electric circuit...
- Q step down transformer is used to reduce the main supply of 220V to 11V If the primary coil draws a current of 5A and the current in secondary coil 90A...
- Q 1 A wire of fixed length is wound on a solenoid of length I and radius r its self inductance is found to be L Now if same wire is...
- Q A uniform disc of radius r and mass m is charged uniformly with charge q This disc is placed flat on a rough horizontal surface having coefficient of friction on...
- Q The impedance of the following circuit at very high frequencies of source voltage between A and B will be R mmmm ww A C 2R R N 2 3R AD...
- Q A sine voltage having maximum value of 283 V frequency of 50 Hz is applie LCR series connection where R 302 L 25 48 mH C 796 uF Then impeden...
- Q Example 6 25 Two rings of radii 5m and 10m move in opposite directions with velocity 20 m s and 10 m s respectively on a conducting surface S There...
- Q A quantum harmonic oscillator is in the energy eigenstate n A time independent perturbation a a acts on the particle where is a constant of suitable dimensions and a and...
- Q Three large identical plates having area A are fixed at separation d from each other as shown Plate 1 is given a charge Qo while plates 2 and 3 are...
- Q In an AC circuit only a resistor of resistance 15 2 is present If voltage applied is V 150sin 500 volt then rms current is NCERT Pg 235 1 5...
- Q 25 In the given circuit the potential difference across resistance is 54 V and power consumed by it is 16 W If AC frequency is 60Hz find the value of...
- Q In the circuit show indicated a uniform magnetic field which is directed into the page and decreasing in magnitude at the rate of 150 T s The reading of ammeter...
- Q If the circular conductor undergoes thermal expansion while it is in a uniform magnetic field a current will be induced in clockwise around it If B is the magnitude of...
- Q 48 One conducting U tube can slide into another U tube maintaining electrical contacts between them A magnetic field B is acting perpendicular to the plane of slide If each...
- Q A coil of resistance 10 Q and inductance 10 H and a battery of emf V are connected in series through a switch k After the steady state the switch...
- Q Find the emf in a coil of of 50 tur ns each of area 50 cm 2 when ma king 1800 rev min in a uniform fiel d flux density...
- Q 5 A horizontal metal wire is carrying electric current from the north to south Using a uniform magnetic field it is to be prevented from falling under gravity The direction...
- Q 29 The radius of the circular conducting loop shown in figure is R Magnetic field is decreasing at a constant rate at Resistance per unit length of the loop is...
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