Physics question and answers for August 23, 2024
- Q 15 Two charges of 25 x 10 coulomb and 25 x 10 coulomb are placed 6 m apart Find the electric field intensity ratio at points 4 m from the...
- Q M The energy stored in the capacitor is U when it is charged with a battery After disconnecting battery another capac tor of same capacity is connected in parallel with...
- Q Capacity of a conductor depends upon 1 Size of conductor 3 Material of conductor 2 Thickness of conductor All of these ortional t
- Q Two capacitors of capacitances 3uF and 6uF are charged to a potential of 12V each They are now connected to each other with the positive plate of each joined to...
- Q An object is kept at infinite distance produces a bright and sharp image on the screen kept at a distance x in front of concave mirror then x is equal...
- Q Two capacitors of capacity C and C are charged upto a potential V and V then condition for not flowing the charg between on connected them in parallel 1 C...
- Q The capacity of a parallel plate capacitor depends upon 1 Nature of the metal 2 Distance between the plates 3 Thickness of the plates 4 Potential difference between the plates
- Q The equivalent capacitance of the circuit shown between points A and B HH 1 F 2 1 F 5 2 HF 1 F 1 F 2 F HH HF B...
- Q 2 A bar of mass m is suspended horizontally on two vertical springs of spring constant k and 3k The bar bounces up and down while remaining horizontal Find the...
- Q 6 The equivalent capacitance in the circuit shown in figure will be 10 A 4uF 4 F B 4 F 3 6 F 4 F 4uF HH 4 8 F
- Q Three charges each of q are placed at the vertices of an equilateral triangle The charge needed at the centre of the triangle for the charges to be in equilibrium...
- Q Two capacitors are joined as shown in figure Potentials at points A and B are V and V respectively The potential of point D is 1 V V 2 A...
- Q 6 F 2 12 F 3 18 F Ten capacitors are joined in parallel and charged with a battery up to a potential V They are then disconnected from battery...
- Q The work done against electric forces in increasing the potential difference of a condenser from 20V to 40V is W The work done in increasing its potential difference from 40V...
- Q The work done in doubling the separation between plates of a parallel plate capacitor of capacity C and having charge Qis 12 1 Q 4 20 2C 4C ograph of...
- Q 58 The alkane that gives only one mono chloro product on chlorination with Cl in presence of diffused sunlight is 1 2 2 dimethylbutane 3 n pentaneb 2 neopentane 4...
- Q 1 250 C 2 600 C 3 Four condensers each of capacity 4m F are connected as shown in the figure If Vp Vo 15 volt the energy store in...
- Q 21 A solid cylinder is rolling down on an inclined plane of angle 0 The coefficient of static friction between the plane and cylinder is u then condition for the...
- Q n identical condenser are joined in parallel and are charged to potential V Now they are separated and joined in ser Then the total energy and potential difference of the...
- Q Two isolated charged metallic spheres of radii R and R having charges Q and Q respectively are connected to each other then there is 1 No change in the electrical...
- Q 0 Two identical thin rings each of radius 10 cm carrying charges 10 C and 5 C are coaxially placed at a distance 10 cm apart The work done in...
- Q 148 If a bimetallic strip is heated it will 1 Bend towards the metal with lower linear thermal expansion coefficient 2 Bend towards the metal with higher linear thermal expansion...
- Q Net force acting on the rod is 1 2qE leftwards 3 Zero 1 2T 3 2 9 m AO me 2qE A light insulating rod AB with two small identical...
- Q The plate separation in a parallel plate condenser is d and plate area is A If it is charged to V volt battery is discon nected then the work done...
- Q An HCl molecule has rotational vibrational motions If the rms velocity of HCI molecules in its gaseous phase is v m is its mass kg is Boltzmann constant then its...
- Q Three charges each of magnitude q are placed at the corner of an equilateral triangle of side a the electrostatic force on each charge w be q q 4 a...
- Q 66 A capacitor of 8 F is connected as shown Charge on the plates of the capacitor a 32 C b 40 C c OC d 80 C 2014 8...
- Q Dotted line represents the graph of fnl against t in a charging R C circuit If the resistance of the circuit is doubled which of the following best represents graphs...
- Q 3 Consider a hollow spherical conductor that has a potential of 300 volts at its outside surface The potential inside the hollow space must be a Zero at the center...
- Q There is uniform electric field of 8x10 N C What is the net flux in SI units of the uniform electric field through a cube of side 0 3 m...
- Q 1 gram of ice at 0 C is mixed with 1 gram of steam at 100 C At thermal equilibrium the temperature of the mixture is 100 C 55 C...
- Q 1 300 V 2 600 V 3 100 V A capacitor is charged by connecting a battery across its plates It stores energy U Now the battery is disconnected and...
- Q In a region of uniform electric field as an electron travels from A to B it slows from UA 6 1 106 m s to ug 4 5 x 106...
- Q Consider two identical rings of mass M and radius R fixed on a horizontal axis in a gravity free space A particle of mass m is held at rest at...
- Q 39 3 Three identical large metal plates are placed in 39 parallel and surface area of each plate is A then find VA V 2Qd 3 Eo A Qd Eo...
- Q The coefficient of volume expansion of a liquid is 49 x 10 5 K 1 Calculate the fractional change in its density when the temperature is raised by 30 C...
- Q View in A constant volume gas thermometer shows pressure reading of 50 cm and 90 cm of mercury at 0 C and 100 C respectively When the pressure reading is...
- Q Find the speed of transverse waves in this wire at 10 C Given Young modulus of copper 1 3 x 10 N m Coefficient of linear expansion of copper 1...
- Q istration 37 The two conducting spherical shells shown in figure are joined by a conducting wire and disconnected after the charge stops flowing Find out the charges on each sphere...
- Q April 2019 V The specific heats Cp and C of a gas of diatomic molecules A are given in units of J mol K by 29 and 22 respectively Another...
- Q Gold crystallises 1 197 N O 3 3 NA in ccp structure The total number of voids present in 197g of gold will be Au 197 4X NAX97 2 2...
- Q 5 A charge q is placed at the origin O of X Y axes as shown in the figure The work done in taking a charge Q from A to...
- Q Force of attraction between two point charges Q and Q separated by d meter is Fe When these charges are given to two identical spheres of radius R 0 3...
- Q 14 The relative velocity of a car A with respect to car B is 30 2 m s due north east The velocity of car B is 20 m s...
- Q 9 Polarizer and analyzer are set with their polarizing directions parallel so that the intensity of transmitted light is maximum Through what angle should either be turned so that the...
- Q Stress vs strain curve for the elastic tissue of the aorta the large tube vessel carrying blood from the heart will be stress is proportional to square of the strain...
- Q 31 In Negative crystal velocity of 1 Point Velocity of O ray is greater than Velocity of E ray in all directions except along optic axis Velocity of 0 ray...
- Q Three rods of the same dimensions have thermal conductivities 3k 2k and k They are arranged as shown with their ends at 100 C 50 C and 0 C The...
- Q 17 Two condensers C and C in a circuit are joined as shown in figure The potential of point A is V and that of B is V2 The potential...
- Q Velocity of wave 6 The extension in a string obeying Hooke s law is x The speed of wave in the stretched string is v If the extension in the...
- Q Two charges 2 C and 8 C are placed at two vertices of equilateral triangle of side 1 m The potential at third vertex of the triangle is NCERT Pg...
- Q A charge q is distributed over two concentric hollow conducting spheres of radii a and b b a such that their surface charge densites are equal The potential at their...
- Q A three stage amplifier has a first stage voltage gain of 100 second stage voltage gain of 200 and third stage voltage gain of 400 Find the total voltage gain...
- Q Two particles of mass M and 2M moving as shown with speeds of 10 m s and 5 m s collide elastically at the origin After the collision they move...
- Q pov It is cut into two symmetrical halves by a plane containing the principal axis and then two pieces are joined as shown in fig The power of the combination...
- Q 1 kg of gaseous CO2 contained in a closed system undergoes a reversible process at constant pressure During this process 42 kJ internal energy is decreased Determine the work done...
- Q A plane progressive wave of frequency 25 Hz amplitude 2 5 x 105 m and initial phase zero propagates along the negative x direction with a velocity of 300 m...
- Q The input power to an amplifier is 15mW while output power is 2W Find the decibel gain of the amplifier Note answer must have decimal point upto 2 decimal e...
- Q A multistage amplifier employs five stages each of which has a power gain of 30 What is the total gain of the amplifier in db Note Answer must be upto...
- Q 13 The condition for minima in Fraunhoffer diffraction for single slit is a sin 8 m A Why m cannot be zero 1 Point For m 0 minima will be...
- Q 26 kg block is connected to a 78 78 kg block by a string The blocks are sliding across a surface where the coefficient of kinetic friction is 0 0...
- Q speed in km s with which it hits the surface of the earth A bullet is fired vertically upwards with velocity v from the surface of a spherical planet When...
- Q 26 Obtain an expression for the acceleration of a particle performing circular motion Explain its two components OR For a particle performing uniform circular motion v xr Obtain an expression...
- Q 5 Calculate the minimum thickness of glass plate which appear dark in reflected light for which angle of refraction 60 degree u 1 5 and 5890 AO 1 Point 3...
- Q 12 An infinite plane sheet of positive charge has surface charge density o A metallic ball of mass m and charge Q is attached to a thread and is tied...
- Q Consider the magnetic circuit of Fig 2 21 a The permanent magnet material Alinco 5 is in demagnetized state It is required to be magnetized to a reduced flux density...
- Q Express the following gains as a number Power gain of 40 db Note Write complete number Do not put decimal e g if answer is 20 40 then write it...
- Q are told a certain object has a temperature of 497 K What is this objects temperature in egrees Celsius and Degrees Fahrenheit 497K 273 224 9 497 32 926 Gf...
- Q A man mass 50 kg and his son mass 20 kg are standing on a frictionless surface facing each other The man pushes his son so that he starts moving...
- Q A vertical ring of radius r is made of a uniform wire of resistance R It slips vertically between two frictionless and resistanceless vertical rails There is a uniform magnetic...
- Q gement shows two long metallic rails connected to resistance R forming an inclined plane Magnetic field is vertical in the region If slider of mass m and length will move...
- Q 5 Find the expression for the torque experienced by an electric dipole placed in a uniform electric field Question 16 Find the expression for the potential energy of a system...
- Q Two infinitely charge sheets having charge density and 20 as shown in the figure The electric field at the point P will be G 20 O 280 30 280 View...
- Q English Two very small spheres having charge Q and Q face each other at a certain distance between them If a dielectric having dielectric constant Kinserted between them then electrostatic...
- Q An object of mass 0 2 kg is hung from a spring whose spring constant is 80 N m The object is subject to a resistive force given by bu...
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