Physics question and answers for August 04, 2024
- Q 14 An electron is projected with uniform velocity along the axis of a current carrying long solenoid Which of the following is true 1 Point The electron will be accelerated...
- Q 1 A 3 C 4 D Breaking stress for a material is 2 x 10 N m What maximum length of the wire of this material can so that the...
- Q 42 Two identical charged pendulums are inclined at angle 30 and 60 from infinite sheet of charge of surface charge densities o and o respectively as shown The ratio of...
- Q In a moving coil galvanometer the deflection on the scale by a pointer attached to the spring is 1 Point NA KB I NAB K I N KBA I KB...
- Q method IST India Standard Time is linked to a set of atomic clocks the no of clocks are 1 One 3 Three 2 Two 4 Four
- Q 12 x m 24 6 8 10 12 14 16 18 20 22 t sec What is nature of acceleration between t 18 s and t 20 s is above...
- Q A convex mirror and a concave mirror of radius 10 cm each are placed 15 cm apar facing each other An object is placed midway between them If the reflection...
- Q A simple pendulum when reaches its maximum angular displacement of 60 from the vertical is hit by a bullet moving horizontally with velocity 200 m s The bullet comes out...
- Q No 17 The magnetic field in a region is given by B Bo the loop is 2 B v d 2a B v d 2a B v d a B...
- Q 4 s 2 s 29 4 m s Find the velocity at which a rifle bullet must be fired vertically so as to reach a height of 1 km What...
- Q A galvanometer of resistance 3092 is connected to a battery of emf 2V with 1970 resistance in series A full scale deflection of 20 divisions is obtained in the galvanometer...
- Q In the following circuit the difference between the readings of ammeters A and A In amp 9p found out to be Find the value of p Assume the resistances of...
- Q 35 A straight thin conductor is bent as shown It carriers a current of i ampere The radius of curvature of the circular arc is r meter The magnetic induction...
- Q 3 In the given graph which of following physica quantities changes their sign Velocity 2V Vo 0 1 Displacement 3 Both 1 and 2 t tim 2 Velocity 4 Acceleration...
- Q A stone attached to a rope of length 1 80 cm is rotated in vertical plane with a frequency n 240 r p m At the moment when the velocity...
- Q The wires which connect the battery of an automobile to its starting motor carry a current of 300 A for a short time What is the force per unit length...
- Q Arrange the following in ascending order of their resistances a Ammeter of range 10 A b Ideal voltmeter c voltmeter of range 100 V d Ammeter of range 1 mA...
- Q A particle moving in a straight line covers half the distance with speed of 10 m s The other half of the distance is covered in two equal time intervals...
- Q A particle moves in a circle of radius 4 cm clockwise at constant speed of 2 cm s If and y are unit acceleration vector along x and y directions...
- Q Stewart kicks a soccer ball with initial velocity of 20 feet per second at an angle of 40 to the horizontal The parametric equation that describes the position of the...
- Q 7 Stress strain curve for four metals are shown in figure The maximum young modulus of elasticity is for meta Strain 1 A 3 C Stress 2 B 4 D
- Q 6 Steam at 100 C is passed into 20 g of water at 10 C When water acquires a temperature of 80 C the mass of water present will be...
- Q nderstand the previous explaination A drop of water of mass m and density p is placed between two well cleaned glass plates the distance between which is d What is...
- Q g 9 8 m s A body is thrown vertically upwards with a velocity of 49 m s Find the time that passes between the instants when it goes past...
- Q When the angular velocity of a uniformly rotating body has increased thrice the resultant of forces applied to it increases by 60 newton Find the accelerations of the body in...
- Q Two identical metallic spheres having charge 6Q and 2Q are placed r distance apart from their centres Force of attraction between them is F After that if they are brought...
- Q An LCR series circuit connected across a source of alternating emf E is in resonance Then the voltage across 1 R is zero 2 R equals to applied voltage zero...
- Q If d d 0 then select correct option 1 The charge in the vicinity of the surface may be zero 2 The electric field must be zero on the surface...
- Q What is the distance of the image of the point object O from the surface of water in the diagram shown below where bottom of the container is silver polished...
- Q Example 13 A steel wire 4 0 m in length is stretched through 2 0 mm The cross sectional area of the wire i 2 0 mm If Young s...
- Q ball is placed on a smooth inclined plane of inclination 0 30 to the horizontal which is ating at frequency 0 5 Hz about a vertical axis passing through its...
- Q BOAL BOVNCERT BASEDOBJECTIVE PHY3 MOTIONINASTRAIGHT UNE P65 11 x m 2 4 6 8 10 12 14 16 18 20 22 t What is nature of acceleration from t t...
- Q A If the force of gravitation is inversely proportional to the distance r rather than 2 given by Newton then orbital velocity of the satellite around the earth is independent...
- Q The maximum current that can be measured by a galvanometer of resistance 40 is 10 mA It is converted into voltmeter that can read upto 50 V The resistance to...
- Q A bimetallic strip consists of metals A and B It is mounted rigidly as shown The metal A has higher coefficient of expansion compared to that of metal B When...
- Q From the equation tan 0 rg one can obtain the angle of banking 0 from vertical for cyclist taking a curve the symbols have the usual meanings The equation is...
- Q 13 A highly conducting cylindrical vessel placed on elevated small supports contains an ideal gas under a piston of mass m Area of the base of the cylinder is A...
- Q of the above Which of the following is the most precis instrument for measuring length 1 Metre rod of least count 0 1 cm 2 Vernier callipers of least count...
- Q Two bodies of masses 1kg 10 kg are dropped from the top of a tower On the surface of earth simultaneously 1 Heavier will reach first 2 Lighter will reach...
- Q 3 In the given figure the network R 2 2 and E 12 V The equivalent resistance of the above network and current through each branch of the network is...
- Q Suppose true value of certain length is near 3 3 578 cm student took three reading with different scale a 3 5 cm using 0 1 cm resolution scale b...
- Q You do a very precise experiment to test the properties of a piece of wire You stretch the wire by applying an outward force to each end of the wire...
- Q N molecules each of mass m of gas A and 2N molecules each of mass 2m of gas B are contained in the same vessel at temperature T The mean...
- Q A ball is thrown from a point at different angles with same speed u and has same range in both cases If h and h are the heights attained in...
- Q 50 A circular coil of one turn is made of a wire of certain length and then from the same length a coil of three turns is made If same...
- Q 5 Check the correctness of the relation S ut at where u is initial veloci acceleration t the time and S the displ 1 Dimensionally correct 2 Dimensionally incorrect 3...
- Q If the mass of the Sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude which of the following is not correct 1 Raindrops...
- Q Select the incorrect are 1 0 06900 has 4 number of significant figur 2 0 6900 has 4 number of significant figur 3 6 900 has 2 number of significant...
- Q The monochromatic beam of light is incident at 60 on one face of an equilateral prism of refractive index n and emerges from the opposite face making an angle 8...
- Q Add 6 75 x 10 cm to 4 52 x 10 cm with regard to significant figures 1 7 20 x 10 cm 3 7 20 x 104 cm 2...
- Q 1 A cell of emf E in the secondary circuit gives null deflection for 1 5 m length of potentiometer of wire length 10 m If another cell of emf...
- Q The centripetal force F acting on a particle 27 moving uniformly in a circle may depend upon mass m velocity v and radius r of the circle Derive the formula...
- Q 26 Write the dimensions of a in the relation P b x at where P is power x the distance and t the time 1 MOLOTO 2 M LOT2 3...
- Q A thin wire has a length of 21 7 cm and radius 0 46 mm Calculate the volume of the wire to correct significant figures 1 0 14 cm 3...
- Q A rigid ring A and a rigid thin disk B bo of same material when gently placed c just manage to float due to surface te shown in the figure...
- Q 5 Alternating current cannot be measured by DC ammeter because becau 1 average value of current for complete cycle is zero 2 AC changes direction 3 AC cannot pass through...
- Q 32 Two sources of equal emf are connected in series to an external resistance R The internal resistances of both the sources are r and 1 such that r r...
- Q 13 Atmospheric pressure is 1 0x105 N m and the density of air is 1 29 kg m If the density of air is constant as you get higher and...
- Q Sir but answer is given as first how as you are stating its answer third 4 0 4 second Which one of the following graphs represents correctly the given wave...
- Q A leaky capacitor Ze 74 5 2 is in series with a coil Z 40 22 and a resistor R 56 2 When a voltage V 200 V is applied...
- Q A playground merry go round of radius 1 5 m has a mass 20 kg with the shape of solid cylinder and is rotating at 10 rev min about its...
- Q an obtuse angle The graph between terminal velocity along y axis and square of radius along x axis of spherical body of density p allowed to fal through a fluid...
- Q 3 4 will fly up When water droplets merge to form a bigger 38 drop down on the floor of the hall 1 Energy is liberated 2 Energy is absorbed...
- Q 34 A given sample of Na2SO4 contains 6 02 x 1022 SO4 ions Calculate i number of Na ions ii number of formula units and iii weight of the sample...
- Q ose the confect potentiometer arrangement is shown in the figure r A 1 R R 2 X wis J Driving cell has emf and internal resistance r Resistance of potentiometer...
- Q om In the figure given below the acceleration of block P is ap 15i 15 under the action of external force Then acceleration of wedge Q is P always remain...
- Q The relative density of a metal by hanging a block of the metal from a spring balance and noting that in air the balance read 5 0 05 N while...
- Q Al Arrangement of three metallic rods riveted to each other is as shown in figure a is the coefficient of linear expansion for aluminum and a when a ag for...
- Q In a container air is filled and maintained at temperature To Inner surface of walls of the container is maintained at temperature T At different values of temperatures T that...
- Q A wire elongates by mm when a load W is 5 hanged from it If the wire goes over a pulley and two weights W each are hung at the...
- Q 4 Becomes zero Water is flowing through a long horizontal 3 tube Let P and P be the pressure at two point A and B of the tube then 1...
- Q Find the right condition s for Fraunhoffer diffraction due to a single slit Multiple correct WB PMT 2015 Your Answer PARTIALLY CORRECT X Source is at infinite distance and the...
- Q A string of a material of length 1 m cross sectional area 0 2 cm requires 2000 N to extend it by 1 mm The same material is used to...
- Q A ball is Pwater P Poil with Poil and Pwater representing the densities of oil and water respectively The oil and water are immiscible If the above ball is in...
- Q A ball of m 1kg is connected from a spring of force constant 225 N m and another ball of mass 3m is hanging from it with the help of...
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