Physics question and answers for August 12, 2024
- Q A solenoid has core of material with relative permeability 400 The winding of the solenoid are insulated from the core and carry a current of 2A It has 1000 turns...
- Q A long solenoid has 1000 turns per meter and carries a current of 1A It has a soft iron core of H 1000 The core is heated beyond the critical...
- Q 12 The apparent coefficient of expansion of a liquid when heated in a brass vessel is X and when heated in a tin vessel is Y If a is the...
- Q rotating Three wire loops and an observer are positioned as shown in the figure From the observer s point of view a current I flows counterclockwise in the middle loop...
- Q 9 If in winter season the surface temperature of lak is 1 C the temperature at the bottom of lake will b 1 1 C 2 0 C 3 4...
- Q A charged particle having mass m charge q is moving with velocity v ai in a magnetic field B pi aj and experiences a force F Which one of the...
- Q No 24 The magnetic field Band the magnetic intensity H in a material are found to be 0 3 T and 400 A m respectively Calculate the relative permeability p...
- Q 1 The magnetic moment produced in a substance of 1 gm is 6 x 107 Axm If its density is 5gm cm then the intensity of magnetisation in A m...
- Q 7 A uniform magnetic field B exists in circular region of radius R as shown which is decreasing with time at a constant rate There is a concentric wooden ring...
- Q A particle of unit mass undergoes one dimensional motion such that its velocity varies according to v x Bx where and n are constants and x is the positi of...
- Q In an isothermal process two moles of an ideal gas expands from volume 2 m to 8 m at temperature of 227 C Heat absorbed by the gas during process...
- Q A metal rod of mass m can slide without friction along two parallel horizontal tracks connected by resistor R A vertical magnetic field B exists in the region The rod...
- Q A transformer operates at V 6 kV on the primary side and supplies electric energy at Vs 220 V to a number of houses in a town If the total...
- Q 9 An ideal gas is compressed to half of its initial volume by means of different thermodynamic processes Which of the process result in the maximum work done on the...
- Q A sound wave given by Ap Apo sinw t r v is produced at z 0 and the reflected wat from other end of the closed tube produces standing wave...
- Q ng y axis an ideal graph is meter of the hole 11 A seconds pendulum clock has a steel wire The clock shows correct time at 25 C How much...
- Q Three parallel bolting forces act on the rim of the circular cover plate as shown in Fig 3 b Determine the magnitude nature and point of application of the resultant...
- Q c 35 x 10 7 N towards wire d 35 x 10 7 N away from wire Two conducting circular loops of radii R and R R R are placed...
- Q I PROBLEM SOLVING Solve the problems below using the step by step procedure that was previously taught in this module 4 points 7 10 Calculate the energy required to increase...
- Q 1 i Two coils A of 12 500 turns and B of 16 000 turns lie in parallel planes so that 60 of flux produced in A links coil B...
- Q An assembly placed on a frictionless floor consists of two light bars A and B four light springs and a block C of mass m Stiffness of each springs is...
- Q 4 Same at all positions of earth In Delhi and Mumbai magnetic needle shows 21 facta the true north quite accurately because 1 In Delhi and Mumbai angle of dip...
- Q A stretching force of 10N is applied at one end of a spring balance and an equal stretching force is applied at the other end at the same time What...
- Q 29 The earth s magnetic field at the equator is 29 gada a total approximately 0 4 G Then the earth s dipole at year an faya moment will be...
- Q 20 Refrigerator is to maintain eatables kept inside at 7 C If the room temperature is 43 C coefficient of performance of refrigerator must be NCERT Pg 322 1 7...
- Q A force acting on a particle A must change the direction of motion of the particle B must change the magnitude of velocity of the p C must change the...
- Q In a bicycle speedometer a attached to the spokes of the wheel and a coil is attached to the frame so that the north pole of the magnet moves past...
- Q 5 Find the net deviation produced in the incident ray for the optical instrument shown in figure Take refractive index of the prism material as 2 1 66 CW 2...
- Q 2 2 Three point masses each of mass m rotate in a circle of radius r with constant angular velocity due to their mutual gravitational attraction If at any instant...
- Q A proton and an electron are held apart a distance of 1 m and then let go Where would they meet O E P a in the middle b closer...
- Q The ionization energy of the electron in the hydrogen atom in its ground state is 13 6 eV The atoms are excited to higher energy levels to emit radiations of...
- Q nce will increase 33 What is the net force on the rectangular coil a b B 2A 1A 2 cm A 25 x 10 7N towards wire 25 10 N...
- Q 9 A force F acts between two charges Q and Q that is placed at a certain distance from eac other The third sphere of charge Q is placed between...
- Q 27 4 A B C D Which planets have maximum minimum magnetic fields respectively 1 Jupiter Venus 2 Mercury Mars 3 Jupiter Mars 4 Venus Mercury A solenoid has core...
- Q X 9 m 1 1 2 m Negre interaction changes Find Vo ve particles do not t each other b w th if v 28 2 final L
- Q A conducting bar of length L is free to slide on two parallel conducting rails as shown in the figure R Two resistors R and R are connected across the...
- Q A point charge 2Q is placed at a distance of 8 cm from centre of a disc on the axis of disc having radius R 6 cm Total electric flux...
- Q For the circuit shown the switch was at a for long time At t 0 the switch is moved to b The solution for the capacitor current variation found to...
- Q If current is doubled the deflection is also 14 f doubled in aga 1 Tangent galvanometer 2 Moving coil galvanometer 3 both 1 and 2 4 None of above 1...
- Q 3 You are at the airport A moving sidewalk moves East at 2 5m s with a supermodel just standing on it letting the sidewalk move her As you sit...
- Q 8 In the circuit shown the capacitor initially had a charge 5 C as shown in the figure The switch is closed at time t 0 Find i the initial...
- Q Mass M is divided into two parts m and m For a given separation the ratio of for which the m M gravitational attraction between the two parts becomes maximum...
- Q wo poin the circumference of a uniform conducting ring of radius r and resistance R Arc AB of the ring subtends an angle 0 at the centre The value of...
- Q A Polychromatic Beam passing through Hydrogen Gas A beam of ultraviolet radiation having wavelength 1000A to 2000A is incident on a sample of atomic hydrogen gas Assuming that all atoms...
- Q A block of mass m is placed on a smooth inclined plane of inclination 0 with the horizontal The force exerted by the plane on the block has a magnitude...
- Q 11 In a non ohmic conductor electron density varies with electric field as n x E Find how the current varies with applied voltage for this conductor if drift velocity...
- Q Total amount of work done in establishing the 5 current I in coil of inductance L is 1 W I dl 1 ar 1 41 3 W 2 W LI...
- Q 0 For a simple harmonic oscillator of mass 10 kg and amplitude A 2m the variation of potential energy U as a function of displacement x from mean position is...
- Q Q6 Assertion The emergent ray is parallel to the direction of the incident ray Reason The extent of bending of the ray of light at the opposite parallel faces air...
- Q Three vessels placed on horizontal ground are shown in figure All three vessels are symmetric about the dotted line shown Which of the following are correct 11 C A B...
- Q 5 1 Three particles each of mass m are located at the vertices of an equilateral triangle of side a At what speed must they move if they all revolve...
- Q Three thin wires of equal length are suspended from the top of a roof The respective ratio of their area of cross section is 1 2 4 and Young s...
- Q A parallel plate air core capacitor is connected across a source of constant potential difference When a dielectric plate is introduced between the two plates then A some charge from...
- Q Convection 3 Conduction 4 Temperature remains same 36 A liquid cools down from 70 C to 60 C in 5 minutes The time taken to cool it from 60 C...
- Q Magnetic field at a distance d from a short bar 3 magnet in tan A and tan B position are in ratio 1 2 1 exact 2 2 1 approx...
- Q Pls explain this with theory 96 The capacitor of capacitance C in the circuit shown is fully charged initially resistance is R After the switch S is closed the time...
- Q evel E M T Quality TA A body of mass 10 kg and velocity 10 m s collides with a stationary body of mass 5 kg After collision both bodies...
- Q Charge Q coulomb s is uniformly distributed throughout the volume of a solid non conducting hemisphere of radius R then potential at its centre is 1 2 3 fo 1...
- Q Two balls with charges Q and 4Q are separated by 3R Where should you place another charged ball Q on the line between the two charges such that the net...
- Q If the angular speed of earth increases to n n times the present value then acceleration due gravity at poles 1 Increases to n2 times 2 Decreases to n times...
- Q 7 A person says that he measured the acceleration of a particle to be nonzero while no force was acting on the particle A He is a liar B His...
- Q An object will continue accelerating until A resultant force on it begins to decrease B its velocity changes direction C the resultant force on it is zero D the resultant...
- Q Two particles A and B of mass 1 kg and 4 kg respectively approach each other due to their mutual gravitational force only Then the ratio of acceleration of A...
- Q questions A man of mass 60kg sitting on ice pushes a block of mass of 12kg on ice horizontally with a speed of 5 ms The coefficient of friction between...
- Q In the potential energy curve for the formation of H molecule as a function of internuclear distance of H atoms what happens at the minimum in the curve 1 Net...
- Q The volume of a liquid is 26 mL A stud ent measures the volume and finds it to be 26 2 mL 26 1 mL 25 9 mL and 26...
- Q 5 Infinite number of masses each of mass 3 kg are placed along the y axis at y 1 m 3 m 9 m 27 m The magnitude of resultant...
- Q dentical parallel plate capacitors of capacitance Ceach have plates of area A separated by a distance d The space between the plates of the two capacitors is filled with three...
- Q The force exerted by the floor of an elevator on the foot of a person standing there is more than the weight of person if the elevator is A going...
- Q The dimensions of the quantities in one or more of the following pairs are the same Identify the pair s a Torque and work b Angular momentum and work c...
- Q Let A i j and B 1 1 The magnitude of a coplanar vector C such that AC B C AB is given by Online April 16 2018 a c...
- Q 40 A block of metal is heated to a temperature much higher than the room temperature and allowed to cool in a room free from air currents Which of the...
- Q The pressure P of an ideal gas varies with its absolute temperature T as shown in figure The molar heat capacity of gas during this process is R is gas...
- Q ALLEN 35 Shown in the figure is a bi convex lens made 35 of different transparent strips of two different refractive indexes If the parallel rays of light is incident...
- Q Statement A For a virtual object convex lens forms real erect and diminished image Statement B For a virtual object concave lens always forms virtual image Assume lens material is...
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