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A particle is in linear simple harmonic motion between two points A and B, 10 cm apart (Fig. ). Take the direction from A to B as the + ve direction and choose the correct

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A mass of 2 kg is attached to the spring of spring constant 50 Nm–1. The block is pulled to a distance of 5cm from its equilibrium position at x = 0 on a horizontal frictionless surface from rest at t = 0. Write the expression for its displacement at anytime

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Consider a pair of identical pendulums, which oscillate with equal amplitude independently such that when one pendulum is at its extreme position making an angle of 2° to the right with the vertical, the other pendulum makes an angle of 1° to the left of the vertical. What is the phase difference between the

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Though India now has a large base in science and technology, which is fast expanding, it is still a long way from realising its potential of becoming a world leader in science. Name some important factors, which in your view have hindered the advancement of science in

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“It is more important to have beauty in the equations of physics than to have them agree with experiments”. The great British physicist P. A. M. Dirac held this view. Criticize this statement. Look out for some equations and results in this book which strike you as

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Calculate the angle of 1″(second of arc or arc second) in radians. Use `360^0`=2π rad, 10=60′ and 1′ = 60

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Fill in the blanks by suitable conversion of units `G = 6.67 × 10^(–11) N m^(2) (kg)^(–2) = .... (cm)^3 s^(–2) g^(–1)`

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If force (F) acceleration (A) and time (T) are taken as fundamental units, then find the dimension of

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Which of the following time measuring devices is most precise? An atomic clock. Give reason for your

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In an experiment, four quantities `a, b, c and d` are measured with percentage error `1%, 2%, 3% and 4%,` respectively. (Quantity P is calculated as follows `P =(a^3b^2)/(cd)`, percentage error in P

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Choose the incorrect statement out of the

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Match the following columns. Column I Column II A. Capacitance p. `'volt (ampere)'^(-1)` B. Magnetic induction q. `'volt-sec(ampere)'^(-1)` C. Inductance r. `'newton (ampere)'^(-1)` `('metre')^(-1)` D. Resistance s. `'coulomb'^2``'(joule)'^(-1)`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Maximum absolute error in the sum or difference of two quantities is equal to sum of the absolute error in the individual quantities, i.e.` Z = A + B,` then `± DeltaZ = ± DeltaA ± DeltaB`Maximum fractional error in a product or division of quantities is equal to the sum of fractional errors in the individual quantities `i.e.' 'AB or A/B,` then `(DeltaZ)/Z=+-(DeltaA)/A+(DeltaB)B`Two resistors of resistances `R_1= 100 ± 3Omega and R_2 = 200 ± 4Omega` are connected (a) in series and (b) in parallelThe percentage error in the value of `R_1`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Given x-t graph represents the motion of an object. Match the Column I (parts of graph) with Column II (representation) and select the correct option from the codes given below. Column I Column II A. Part OA of graph p. Positive velocity B. Part AB of graph q. Object at rest C. Part BC of graph r. Negative velocity D. Point A in the graph s. Change in direction of motion

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Average Speed and Average Velocity-When an object is in motion, its position changes with time. So, the quantity that describes how fast is the position changing w.r.t. time and in what direction is given by average velocity.It is defined as the change in position or displacement `(Deltax)` divided by the time interval `(Delta t)` in which that displacement occur. However, the quantity used to describe the rate of motion over the actual path, is average speed. It defined as the total distance travelled by the object divided by the total time taken.A `250 m` long train is moving with a

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A vector is given by `A=4hati + 3hatj + 5hatk`, where `alpha, beta and gamma` are the angles made by A with coordinate axes. Then, match the Column I with Column II (respective values) and select the correct option from the codes given below. Column I Column II A. `alpha` p. `cos^(-1) (1'/'sqrt2)` B. `beta` q. `cos^(-1) (4'/'5sqrt2)` C. `gamma` r. `cos^(-1) (3'/'5sqrt2)`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Relative Velocity Every motion is relative as it has to be observed with respect to an observer. Relative velocity is a measurement of velocity of an object with respect to other observer. It is defined as the time rate of change of relative position of one object with respect to another.For example, if rain is falling vertically with a velocity `v_r` and a man is moving horizontally with `v_m`, the man can protect himself from the rain if he holds his umbrella in the direction of relative velocity of rain w.r.t. man.A train is moving towards East and a car

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Uniform Circular Motion When an object follows a circular path at a constant speed, the motion of the object is called uniform circular motion. The word uniform refers to the speed which is uniform (constant) throughout the motion. Although the speed does not vary, the particle is accelerating because the velocity changes its direction at every point on the circular track.The figure shows a particle P which moves along a circular track of radius `r` with a uniform speed `u`.A car runs at a constant speed on a circular track of radius 100 m, taking `62.8 s` for every circular

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Two equals forces are acting at a point with an angle of 60° between them. If the resultant force is equal to `40sqrt3 N`, the magnitude of each force

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A ball of mass `1 kg` hangs in equilibrium from a two strings `OA and OB` as shown in figure. What are the tensions in strings `OA and OB`? (Take, `g=10

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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