Physics question and answers for August 11, 2024
- Q If a copper plate is allowed to oscillate between 3 N pole S pole of a magnet like a simple pendulum then 1 it will oscillates for o time 2...
- Q A p type semiconductor Is electrically positive Is electrically negative Is electrically neutral Is electrically positive for excessive doping
- Q A convex lens is made of two different materials having radius of curvature of surface A and surface B as 25 cm and 24 cm respectively The effective focal length...
- Q You have two coaxial cylindrical conducting shells one with radius a and the second radius b a b The inner shell radius a is at potential V 0 the outer...
- Q An airplane must achieve a speed of 200 0 km h before it gets to the end of the runway If the runway is 1800 m long what minimum acceleration...
- Q 17 A value of co for which the current amplitude is 17 1 2 power dissipated by the circuit becomes 1 double 3 one third times its maximum value At...
- Q 9 An electron beam has the diameter 1 mm the electrons have the kinetic energy T 10keV What is the charge density in the beam if the total current is...
- Q A solid cylinder of radius 4 cm and length 50 cm emissivity 0 85 and temperature 127 C is radiating energy at rate P in surrounding at temperature 27 C...
- Q 4 none of these 2 An applied voltage signal consists of a superposition of a d c voltage and an a c voltage of high frequency The circuit consists of...
- Q When a capacitor initially charged is cor to a inductor the change on the capacit the current in the circuit exhibit the phenom 1 electrical oscillations 2 induction 3 power...
- Q 24 A uniform solid cylinder of radius R is spun and then placed on an incline having coefficient of friction tane 0 is the angle of incline The cylinder continues...
- Q Two particles P and Q start their motion from same point along same straight line Pmoves with constant velocity 50 m s and starts moving with constant acceleration 10 m...
- Q If sun radiates electromagnetic energy of 18 3 9 x 1026 watt and radius of sun is 6 96 x 108 m then intensity of sunlight at the solar surface...
- Q A man wants to reach point B on the opposite bank of a river flowing at a speed u as shown in the figure What minimum speed relative to water...
- Q 1 A truck with a mass of 40 000 kg rolls down a hill without friction from an initial height of 200 m It rolls over a 300 m long...
- Q A particle is placed inside a hemispherical bowl which rotates about its vertical axis with constant angular velocity w It is just prevented from sliding down when OP is inclined...
- Q The figure shows four identical conducting plates each of area A The separation between the consecutive plates is equal to L When both the switches xV A Find the value...
- Q 4 3 76 S2 A compass is placed between the platesc charging capacitor then its deflection will 1 Be zero always 2 will be non zero always 3 will become...
- Q A wave is propagating in a medium of dielectric constant 2 and relative m permeability 50 The wave impedance a medium is 1 5 Q 3 1883 N 2 376...
- Q 2 12 A circular current loop of magnetic moment M is in an arbitrary orientation in an external magnetic field B The work done to rotate the loop through 45...
- Q spring of force constant k and a block of mass m If the block is slightly displaced vertically down from its equilibrium position and then released the period of its...
- Q 1 and 2 14 Figure shows the variation of i with oo in a m 1 0 in A 0 5 0 0 FG 11 00 0 5 1 0...
- Q When a high frequency current is passed through a coil which surrounds the metal the generated in metal produces sufficient to it 1 induced emf low 2 induced current low...
- Q A metal sheet with a circular hole is heated The hole 1 Gets larger 2 Gets smaller 3 Remains of the same size 4 Gets deformed EXERCISE stant volume gas...
- Q Consider a point A far away from short dipole p By keeping r constant 0 varies from 0 to 360 Variation of potential of dipole at A with respect to...
- Q Equation sin cot implies that the 12 dt equation for i t the current as a function of time must be such that di 1 its slope is a sinusoidally...
- Q 1 2 8 A metallic vessel of negligible heat capacity contains 0 5 kg of water of specific heat capacity 4200 J kg K It is heated from 15 C...
- Q The X X bond length is 1 5 and Y Y bond length is 1 48 If electronegativity values of X and Y are 3 and 3 5 respectively then...
- Q Consider the following statements regarding the real images formed with a converging lens Real images can be seen only if the image is projected onto the screen The real image...
- Q 3 A projectile of mass m is fired with velocity from a point as shown in figure neglecting air resistance what is the change in momentum when leaving from P...
- Q 1 5 7 10 C 2 0 63 10 PC 3 1 9 10 c 4 16 1 x 10 rc Ratio among linear expansion coefficient c area expansion coefficient...
- Q A ball of mass 3 kg is moving at speed of 20 ms makes a head on collision with an identical ball at rest The kinetic energy of the ball...
- Q A milli ammeter of range 10 mA and resistance 9 Q are joined in a circuit as shown in the figure The meter gives full scale deflection when current in...
- Q A man has a mass of 78 0 kg What is his weight on Earth 764 N You are correct Previous Tries Your receipt no is 161 3011 What would...
- Q A metal sphere weighs 200 gram in air and 170 gm in water Then find the volume of cavity in cc in metal sphere If Pmetal 8gm c c Pwater...
- Q Same current is flowing in two alternating 2 circuits The first circuit contains only inductance and the other circuit contains only a capacitance If the frequency of the e m...
- Q A force F acting on an object varies with distance x as shown here The work done by the force in moving the object from x 0 to x 6...
- Q A zinc ball of radius R 1 cm charged to a potential 0 5 V The ball is illuminated by a monochromatic ultraviolet UV light with a wavelength 290 nm...
- Q lonized hydrogen atoms and a particles with same momenta enters perpendicular to constant magnetic field B The ratio of thei radii of their paths will be 1 2 1 3...
- Q Body A of mass 4m moving with speed u collides with another body B of mass 2m at rest The collision is head on and elastic in nature After the...
- Q The density of liquid contained in the tank of area 0 5 m is 1200 Kg m It has a hole of area 1 cm near the bottom A load...
- Q Sec 6 3 Consider a block with a mass of 1 82 kg that is tied to the end of a rope R 5 34 m long The block moves...
- Q n the given circuit a charge of 80 C is given to the left plate of 4 F capacitor Then in steady state energy stored inside 2 F capacitor will...
- Q WTON S LAWS Two masses M and M are connected to the ends of a string passing over a smooth pulley The tension in the string is T and the...
- Q 1 Two bodies of mass 4 and 6 kg arc attached to the ends of a string passing over a pulley A 4 kg mass is attached to the table...
- Q If A 21 3 and B 51 7 then the vecto having the magnitude of A and direction of B would be 1 2 1 74 21 33 2 74...
- Q A 56 0 g toy car is released from rest on a frictionless track with a vertical loop of radius R The initial height of the car is h 4...
- Q The energy band diagram of a semiconductor material is shown in figure C B V B The semiconductor is of n type E p type Intrinsic type Data is insufficient
- Q The physical quantity electric potential V has dimensions M LbTCA and capacitance C has dimensions MSLITSA Then a b c d ef g his Answer
- Q 1 23 points An electron has an initial speed of 6 2 x 106 m s at point A The electron moves from point A and stops at point B...
- Q A circuit is made up of resistance 3 0 and inductance 0 01 H An alternating emf of 100 V at 50 Hz is connected then the phase difference between...
- Q 32 A bar magnet of magnetic dipole M 51 A m is placed in region of magnetic field B 21 31 4k tesla the magnitude of torque EY les acting...
- Q A liquid dose containing radioactive substance x is scheduled to be prepared at 9 AM and 1 ml of it is given to a patient at 10 30 AM If...
- Q Two large parallel sheets charged uniformly with surface charge density o and o located as shown in the figure Which one of the following graphs shows the variation of electric...
- Q An air bubble in sphere having 4 cm diameter appears 1 cr from surface nearest to eye when looked along diameter aHg 1 5 the distance of bubble from refracting...
- Q A solid sphere rolling on a rough horizontal surface with a linear speed v collides elastically with a fixed smooth vertical wall The speed of the sphere after it has...
- Q 13 The phase of a particle in SHM at time t is 1 6 The following inference is drawn from this 1 The particle is at x a 2 and...
- Q The time period of a body undergoing simple harmonic motion is given by T p DSC where p is the pressure D is density and S is surface tension The...
- Q Attempt All 35 questions The length and breadth of a rectangle are 5 5 0 1 cm and 2 5 0 1 cm Calculate area of the rectangle with error...
- Q If an inclined plane is made slowly horizontal by reducing its inclination with horizontal the component of weight parallel to the plane of block resting on the inclined plane A...
- Q A steel tank contain 300g of ammonia gas at pressure 1 35 106 Pa and temperature 77 C If some gas is removed from tank and temperature reduced to 27...
- Q Note All questions are compulsory Each question carry 1 mark 1 The mathematical expression of density is Density mass volume Density mass x volume a b C d Density area...
- Q A particle is suspended from a fixed point by a string of length 5m It is projected from the equilibrium position with such a velocity that the string slackens after...
- Q 30 A U shaped wire having current i is place of magnetic field as shown in figure the magnetic force acting on wire is 41 1 r 21 Bi 3...
- Q 05 Three equal weights A B C of mass 2 kg each are hanging on astring passing over a fixed frictionless pulley as shown in the figure The tension in...
- Q The energy gap of an element is given as 5 9 10 ev Calculate the intrinsic com length if 1 5 82 10 m s n 5 0 mm b...
- Q Example 8 5 The planet Mars has two moons phobos and delmos i phobos has a period 7 hours 39 minutes and an orbital radius of 9 4 x10 km...
- Q The coefficients of apparent expansion of a liquid when determined using two different vessels A and B are y and Y2 respectively If the coefficient of linear expansion of the...
- Q 08 The elevator shown in figure is descending with an acceleration of 2 ms 2 The mass of the block A 0 5 kg The force exerted by the block...
- Q A particle of mass M moves in a circular orbit in such a way that the potential energy is U ar where a is a constant an r is the...
- Q 1 If x and y be the distances of the object and 31 image formed by a concave mirror from its focus and f be the focal length then 1...
- Q A steel rod of length 1m is heated from 25 C to 75 C keeping its length constant The logitudinal strain developed in the rod is Given coefficient of linear...
- Q A convergent lens of 6 diopters is combin with a diverging lens of 2 diopters Find power of combination 1 4 diopter 2 6 diopter 3 8 diopter 4 10...
- Q Optical fibre consists of core and claddin whose refractive index are related as 1 core clading 2 core clading 3 core clading 4 No relation between them
- Q A truck starts from rest and accelerates uniformly with 2 ms 2 At t 10 s a stone is dropped by a person standing on the top of the truck...
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