Physics question and answers for August 01, 2024
- Q Refer to figure 2 E1 Find a the magnitude b x an y components and c the angle with the X axis of th resultant of OA BC and DE...
- Q A force F k yi xj where k is a positive constant acts on a particle moving in the x y plane Starting from the origin the particle is taken...
- Q O Single Correct MCQ The coercivity of a small magnet where the ferromagnet gets demagnetized is 3x 10 A m 1 The current required to be passed in a solenoid...
- Q Single Correct MCQ The current voltage relation of diode is given V 1000 where the applied T I e by 1 mA voltage V is in volts and the temperature...
- Q 5 If radius of earth contracted by 0 1 its mass remaining same then weight of the body at earth s surface will increase by 1 0 1 3 0...
- Q 3 Melting 26 Q heat flows per second through the rod of length L and area of cross section A If it is stretched to double its length then what...
- Q 1 English In the circuit shown in the figure if the potential at point A is taken to be 2V the potential at point B is R www 1 2...
- Q A When a conducting wire loop which is inside a uniform magnetic field directed perpendicular to its plane is moving with uniform velocity an emf is induced in it R...
- Q the correct statements a Average speed of a particle in a given time is never less than the magnitude of the average velocity du dt by It is possible to...
- Q A radioactive element X converes into another stable element Y Half life of X is 2hrs Initially only X is present After time t the ratio of atoms of X...
- Q 41 Two metal spheres of radii R and 2R having some charge density o are brought in contac then charge densities becomes Dim 81m 20 3 50 50 a 2...
- Q O Single Correct MCQ In 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...
- Q A metallic sphere with an internal cavity weights 40gm in air and 20gm in water If the density of the material with the cavity is 2gm CC then the volume...
- Q Four particles each with a mass of M equidistant from each other move along a circle with a radius of R under the action of their mutual gravitational attraction The...
- Q 162 A series LCR circuit is connected to an ac voltage source When L is removed from the circuit the phase difference between current and voltage TT If instead C...
- Q In the circuit of the figure 1 50 kV C 6 60 F R R R3 0 870 MQ With C completely uncharged switch S is suddenly closed at t...
- Q A cylindrical capacitor has length 54 cm and radii 4 cm and 3 cm Potential of the inner cylinder when it is given a charge InC and outer cylinder is...
- Q at A and B are same An air capacitor has capacitance 70 F with a separation between plates 20 mm Now distance between plates is doubled and dielectric of k...
- Q Two charge 6 C and 4 C are separated at distance 15 cm apart then the point on the line joining the charges where electric potential is zero is 1...
- Q O Single Correct MCQ The pressure that has to be applied to the ends of a steel wire of length 10 cm to keep its length constant when its temperature...
- Q A When the magnetic flux through the loop decreases w r t position then there is induced emf in the loop R The direction of induced current is in such...
- Q Adjacent graph is drawn for particle along straight line motion a Acceleration v velocity Find displacement of particle in meters from re till it acquires velocity 2 ms 1 3...
- Q 46 A body of mass m 4 kg is acted upon by a constant 46 m 4lgt 1 force such that its position varies with time as r 1 5...
- Q 37 A metal sphere of radius R is given a potential 37 V then energy stored inside the concentric sphere of radius 2R is 1 TE RV 3 2 RV...
- Q Phy Section A This section contains 20 SINGLE CORRECT TYPE questions Each question has 4 choices 1 2 3 and 4 out on The unit of self inductance is Volt...
- Q Resistance of AB wire is 2000 2 and resistance of voltmeter is 1500 2 If sliding contact is in the middle of AB wire then reading of voltmeter will be...
- Q Board Competitive Exams 41 Two projectiles of same mass and with same velocity are thrown at an angle 60 and 30 with the horizontal then which will remain same 1...
- Q Two identical narrow slits S and S2 A very small completely absorbing strip is placed at distance y from the point C C is the point on the screen equidistant...
- Q 5 If a solid is floating on a liquid then which of the thermal following statements is wrong a coefficient of linear expansion of solid y thermal coefficient of cubical...
- Q correct If time taken by a pendulum to complete 20 vibrations is 60 60 s then time period of the pendulum in s up to appropriate significant figures is 03...
- Q Resistance of a wire at any given temperature C is given by R 0 R 1 ad ao where apare positive constants and R is the temperature at 0 C...
- Q 105 100 g ice at 0 C is dropped into a calorimeter of water equivalent 100 g containing 100 g water at 40 C Resulting temperature of the mixture at...
- Q A particle is projected with an unknown velocity at and angle of 45 with an unknown velocity at an angle of 45 with horizontal It grazes the top of a...
- Q Statement l For a binary solution of two known liquids A and B with the knowledge of density of solution molarity can be converted into molality Statement II Molarity changes...
- Q DE02 BOAHBO NCERT BASED OBJECTIVE PHYNELECTROSTATIC POTENTIAL CAPACITANCEP65 29 Curve A and B represents variation in el field and potential of a point charge ther E or V A B...
- Q In the given figure charge on capacitor C C 2 F H C 1 F 1 22 C C 4 F HH HH 66V C 3 F 2 44 C
- Q The value of acceleration and friction force in the given diagram is Ms 0 4 MK 0 3 53 F 500N 12 kg 1 4 m s upward 120 N...
- Q A In the case of ground to ground projection of a projectile from ground the angle of projection with horizontal is 0 30 There is no point on its path...
- Q charge then B 1 Sign of V V is negative B 2 Sign of work done by external agency in moving a negative charge from B to A is negative...
- Q long cylindrical conductor of cross sectional area S is made of a material whose resistivity depends only the distance r from the axis of the onductor as p where is...
- Q com Two cylindrical conductors with equal Cross section and different conductivity and o are connected in series end to end If current I flows through his combination then O Current...
- Q 34 An ideal gas is made to expand from an initial volume V to a final volume 4V through three different thermodynamic processes as shown in figure Process 1 is...
- Q 5 Work done against electrostatic force in bringing a unit positive charge from infinity to a point is 1 Equal to the electrostatic potential V at that point 2 equal...
- Q 3 If dielectric constant and dielectric strength be denoted by k x respectively then a material suitable for use as a dielectric in a capacitor must have 1 high k...
- Q 25 A small sphere of radius r having charge q is 25 r enclosed by a spherical shell of radius r having charge q Which charge will necessarily flow from...
- Q A 50 KW DC generator produces a potential difference 250 V If the resistance of the transmission line is 12 what percentage of the original power is lost during the...
- Q 3 A sinusoidal ac current passes through a resitor o resistance R in LCR series circuit If phase difference between supplied voltange and supplied current is and peak value of...
- Q a 15 m b 25 m c 35 m Q 95 A stone is dropped from a height h Simultaneously another stone is thrown up from the ground which reaches...
- Q 5 A block is kept on a fixed inclined plane of inclination 60 as shown Coeficient of friction 1 between the block and the incline is To keep the block...
- Q lons Each question has 4 choices 1 2 3 and 4 out of which only one is correct For the given potentiometer set up A is a primary cell which...
- Q A At the highest point the velocity of projectile is zero R At maximum height projectile comes to rest
- Q 67 An iron tyre is to be fitted onto a wooden wheel 1 metre in diameter The diameter of the tyre is 6 mm smaller than that of the wheel...
- Q R Maximum deviation of the projectile is 20 60 A Three vectors having magnitudes 10 10 and 25 cannot produce zero resultant R If three vectors are producing zero resultant...
- Q gm of ice at 20 C is kept into a calorimeter containing 10 gm of water at 10 C The specific heat of water is twice that of ice When...
- Q A molecule of a substance has dipole mome 10 c m One mole of this substance polarised by applying a strong electric fie 10 V m If direction of electric...
- Q Two plane mirror arc enclined to each other as show ray of light is incident at an angle of 30 on one of the The ray after reflection falls on...
- Q 4 A human body has a surface area of approximately 1 m The normal body temperature is 10 K above the surrounding room temperature To Take the room temperature to...
- Q D A Uniform circular motion is accelerated motion still speed remains unchanged R Instantaneous velocity is always normal to instantaneous acceleration in uniform circular motion
- Q A particle is released from rest from a top of incline plane of angle 37 Top rd is smooth and bottom 3rd is rough If again come to rest at...
- Q 10 A particle starts from rest at x 0 and acceleration varies with x as shown in the figure Then a m s 4 x m 1 The particle comes...
- Q ion A Section contains 20 SINGLE CORRECT TYPE questions Each question has 4 choices 1 2 3 and 4 out of which only one is correct a 6 respectively then...
- Q Are not equal to each other in magnitude 4 Cannot be predicted 6 A wheel has angular acceleration of 3 0 rad s and an initial angular speed of 2...
- Q tan a Velocity v versus time 1 graph of a particle moving in a straight line is shown in the figure If tan B particle till the time its velocity...
- Q In the figure the potentiometer wire AB of length L has resistance 5r is joined to the cell D of emt E and internal resistance The cell C semfis resistance...
- Q For the circuit shown the power dissipated in the external variable resistance R is plotted against R The value of internal resistance of cell e is O r 360 O...
- Q one hereas B IS a equal base area and height are arranged as shown in figure A is a hollow uniform thin conical shell without base If centre mass of...
- Q 4 XERCISE 10 300 gm of water at 25 C is added to 100 gm of ice at 0 C The final temperature of the mixture is 5 C E...
- Q Two balls of mass 6 kg and 8 kg move towards each other with speed 35 m s and 28 m s If collision is perfectly elastic then speed of...
- Q 4 A hallow cylinder is rotating about its axis and a man is sticking against its wall Find minimum angular speed of cylinder so that he does not fall assuming...
- Q correct How many significant figures are there in the measured value 0 0005203 07 LE CORRECT TYPE questions Each question has 4 choices 1 2 3 and 4 out of...
- Q 8q 8q 3 W oq 4 Non Work done in moving a charge from one poi to the other inside a uniformly charge conducting sphere is 1 Always zero 3...
- Q Paragraph A small object mass m falls freely from rest under gravity from a height h and strikes obliquely Fixed smooth inclined plane as shown in figure The impact is...
- Q 26 The temperature gradient in a rod of 0 5 m long is 80 C m If the temperature of hotter end of the rod is 30 C then the...
- Q A light rod carries three equal masses P Q and R as shown in figure The angular acceleration of Q in vertical position of rod If it is released from...
- Q For a given cell the internal resistance is found to be proportional to the current drawn from it Then which of the following is the best representation of terminal potential...
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