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NEET - Grade 12 - Physics - Atoms - Introduction and Snapshot of Atoms - Study ref# 839
Introduction: By the nineteenth century, enough evidence had accumulated in favour of atomic hypothesis of matter. In 1897, the experiments on electric discharge through gases carried out by the English physicist J.J. Thomson (1856 - 1...
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NEET - Grade 12 - Physics - Alternating Current - Introduction and Snapshot of Alternating Current - Study ref# 825
Following section must be covered to understand the Alternating Current: 1. Introduction 2. AC Voltage Applied to a Resistor 3. Representation of AC Current and Voltage by Rotating Vectors – Phasors 4. AC Voltage Applied to an In...
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NEET - Grade 11 - Physics - Oscillations - Importance and Snapshot of Oscillations - Study ref# 730
Introduction: The study of oscillatory motion is basic to physics; its concepts are required for the understanding of many physical phenomena. In musical instruments like the sitar, the guitar or the violin, we come across vibrating st...
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NEET - Grade 11 - Physics - Oscillations - Importance and Snapshot of Oscillations - Study ref# 731
Following sections must be covered to understand Oscillations: 1. Introduction 2. Periodic and oscillatory motions 3. Simple harmonic motion 4. Simple harmonic motion and uniform circular motion 5. Velocity and acceleration in si...
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NEET - Grade 11 - Physics - Oscillations - Target Setup for Oscillations - Study ref# 732
Student requires to achieve the following milestones to get better grip over Oscillations. The milestones / targets are as follows:- Starting Point: Days 0Test TypeAppear on TestTarget TestsScorePractice Test000%Chapter Test000%S...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 958
What is the total distance travelled by a body executing SHM in a time equal to its time period, if its amplitude is A? Answer: Total distance travelled in time T is ....
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NEET - Grade 11 - Physics - Oscillations - Study ref# 960
On an average a human heart is found to beat 75 times in a minute. Calculate its beat frequency and period. Answer: The beat frequency of heart is
The time period
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NEET - Grade 11 - Physics - Oscillations - Study ref# 962
What force keep the simple pendulum in simple harmonic motion? Answer: The component of weight due to gravitational force ( i.e.
keeps the simple pendulum in simple harmonic motion....
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NEET - Grade 11 - Physics - Oscillations - Study ref# 963
A vibrating simple pendulum of period T is placed in a lift which is accelerating upwards. What will be the effect on the time period? Answer: As effective value of acceleration due to gravity increases i.e.
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NEET - Grade 11 - Physics - Oscillations - Study ref# 964
Can a pendulum watch give correct time in an artificial satellite? Explain. Answer: No, in an artificial satellite, the body is in weightlessness condition, where g = 0. The time period of pendulum watch
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NEET - Grade 11 - Physics - Oscillations - Study ref# 965
The maximum acceleration of a simple harmonic oscillator is
and maximum velocity is
. What is the displacement amplitude? Answer: Let A ...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 966
What are the phase relationship between displacement, velocity and acceleration in SHM? Answer: In SHM, the velocity leads the displacement by a phase
radians and acceleration leads velocity ...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 967
Can the function
represent the simple harmonic function? Explain. Answer: The function,
Or,
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NEET - Grade 11 - Physics - Oscillations - Study ref# 968
The time period of an oscillating body is given by
What is the force equation for this body? Answer: Given time period
Compare this wit...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 969
The period of vibration of a mass m suspended by a spring is T. the spring is cut into n equal parts and the body is again suspended by one of the pieces. Find the time period of oscillation of the mass. Answer: Let k be the spring constant of ...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 970
A girl sitting on a swing stands up. What will be the effect on the periodic time of the swing? Answer: The time period, T will decrease. Reason: In the standing position, the position of centre of mass of the girl shifts upwards. Due to ...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 971
At what displacement (i) the potential energy of a simple harmonic oscillator is maximum and minimum (ii) the kinetic energy is maximum and minimum? Answer: (i) The potential energy of a particle executing SHM is give...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 972
Are the functions
and
(i) Periodic and (ii) harmonic? Explain. Answer: (i) The fun...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 973
The amplitude of a simple harmonic oscillation is doubled. How does this affect (i) periodic time (ii) maximum velocity (iii) maximum acceleration and (iv) maximum energy? Answer: (i) Time period of oscillation of sim...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 974
What is the length of a second pendulum? Answer: A second pendulum has time period If
is the length of this pendulum, then
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NEET - Grade 11 - Physics - Oscillations - Study ref# 975
What do you mean by resonance? Amplitude of a wave is represented by
. Under which conditions, resonance will occur? Answer: The phenomenon of increasing amplitude when the driving force i...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 976
Derive the expression for potential energy and kinetic energy of a simple harmonic motion represented by
. Answer: Displacement of simple harmonic motion is
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NEET - Grade 11 - Physics - Oscillations - Study ref# 977
Show that total energy of a simple harmonic motion is constant and draw the curve for potential energy, kinetic energy and total energy with time for displacement equation
Answer: For displac...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 978
Derive the expression for frequency of a simple pendulum. Answer: A simple pendulum is defined as a bob of mass m suspended from a point O by a string of length and of negligible mass. When the bob is pulled aside from its mean posi...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 979
Derive the expression for frequency of a spring-block system when the block is kept on a floor and other side of spring is attached to a rigid wall. Answer: Suppose a block of mass m is attached to the free end of a massless spring of ...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 980
Derive the expression for average potential energy and average kinetic energy for a simple harmonic oscillator represented by
and show that total energy of a simple harmonic oscillator is equ...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 981
What is the percentage change in the time period, if the length of simple pendulum increases by 3%? Answer: Time period of simple pendulum of length
Now taking log one both sides of the equ...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 982
What is the frequency of a second’s pendulum in an elevator moving up with an acceleration of
? Answer: Time period of second pendulum is So, frequency
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NEET - Grade 11 - Physics - Oscillations - Study ref# 983
The period of oscillation of a mass m kg is suspended by an ideal spring is 1.5 sec. if an additional mass 3 kg be suspended, the time period is increased by 1 sec, find the value of m. Answer: In first case,
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NEET - Grade 11 - Physics - Oscillations - Study ref# 984
A particle executing SHM given by
in SI units. Find (i) amplitude (ii) frequency and (iii) time period of vibration. Answer: Given,
Compa...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 985
A body weighing 10 kg is executing SHM, has a velocity of 6 ms-1, after one second of starting from the mean position, find its kinetic energy, potential energy and total energy. Given, its time period is 6 second. Answer: Given that, m = 10...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 986
What is the ratio between the potential energy and the total energy of a particle executing SHM, when its displacement is half of its amplitude? Answer:
...
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NEET - Grade 11 - Physics - Oscillations - Study ref# 987
A particle is executing S.H.M Identify the positions of the particle where: 1. K.E. of the particle is zero. 2. P.E. is zero. 3. P.E. is one fourth of the total energy. 4. P.E. and K.E. are equal. Answer: 1. At extreme position ...
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NEET - Grade 12 - Physics - Electrostatic Potential and Capacitance - Study ref# 10487
Calculate the potential energy of a point charge –q placed along the axis due to a charge +Q uniformly distributed along a ring of radius R. Sketch potential energy as a function of axial distance z from the centre of the ring. Looking at gr...
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NEET - Grade 12 - Physics - Magnetism and Matter - Study ref# 10541
A bar magnet of magnetic moment m and moment of inertia I(about center, perpendicular to length) is cut into two equal pieces, perpendicular to length. Let T be the period of oscillations of the original magnet about an axis through the mid-...
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NEET - Grade 12 - Physics - Electromagnetic Induction - Study ref# 10554
A rectangular frame of wire is placed in a uniform magnetic field directed outwards, normal to the paper. AB is connected to a spring which is stretched to
and then released at time t = 0....
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NEET - Grade 12 - Physics - Alternating Current - Study ref# 10569
Show that in the free oscillations of an LC circuit, the sum of energies stored in the capacitor and the inductor is constant in time. Answer: At an instant t, charge q on the capacitor and the current i are given by:
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