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A system of two identical rods (L-shaped) of mass m and length l are resting on a peg P as shown in the figure. If the system is displaced , find the period of oscillations:qin its plane by a small angle
The correct answer is:
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A particle starts from a point P at a distance of A/2 from the mean position O & travels towards left as shown in the figure. If the time period of SHM, executed about O is T and amplitude A then the equation of motion of particle is :
A particle starts from a point P at a distance of A/2 from the mean position O & travels towards left as shown in the figure. If the time period of SHM, executed about O is T and amplitude A then the equation of motion of particle is :
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The figure shows a graph between velocity and displacement (from mean position) of a particle performing SHM:
The figure shows a graph between velocity and displacement (from mean position) of a particle performing SHM:
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In the figure shown, two identical discs of radius R each are placed on a smooth horizontal plane. Thread unwraps without slack from discs when they move away from each other. At any instant acceleration of centres of disc A and B are a2 and a1 respectively in opposite direction while their angular acceleration a2 are a1 and respectively. If string unwraps from discs without slipping then
In the figure shown, two identical discs of radius R each are placed on a smooth horizontal plane. Thread unwraps without slack from discs when they move away from each other. At any instant acceleration of centres of disc A and B are a2 and a1 respectively in opposite direction while their angular acceleration a2 are a1 and respectively. If string unwraps from discs without slipping then
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A uniform disc of mass M and radius R is supported vertically by a pivot at its periphery as shown. A particle of mass M is fixed to the rim and raised to the highest point above the centre. The system is then released from rest and it can rotate about its pivot freely. The angular speed of the system when the attached object is directly beneath the pivot is
A uniform disc of mass M and radius R is supported vertically by a pivot at its periphery as shown. A particle of mass M is fixed to the rim and raised to the highest point above the centre. The system is then released from rest and it can rotate about its pivot freely. The angular speed of the system when the attached object is directly beneath the pivot is
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One ice skater of mass m moves with speed 2v to the right, while another of the same mass m moves with speed v toward the left, as shown in figure I. Their paths are separated by a distance b. At t = 0, when they are both at x = 0, they grasp a pole of length b and negligible mass. For t > 0, consider the system as a rigid body of two masses m separated by distance b, as shown in figure II. Which of the following is the correct formula for the motion after t = 0 of the skater initially at y=b/2?
One ice skater of mass m moves with speed 2v to the right, while another of the same mass m moves with speed v toward the left, as shown in figure I. Their paths are separated by a distance b. At t = 0, when they are both at x = 0, they grasp a pole of length b and negligible mass. For t > 0, consider the system as a rigid body of two masses m separated by distance b, as shown in figure II. Which of the following is the correct formula for the motion after t = 0 of the skater initially at y=b/2?
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Calculate the phase velocity of electromagnetic wave having electron density and frequency for D layer, N = 400 electron/ cc, n = 300 kHz –
Calculate the phase velocity of electromagnetic wave having electron density and frequency for D layer, N = 400 electron/ cc, n = 300 kHz –
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In which frequencies range space waves are normally propagated –
In which frequencies range space waves are normally propagated –
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When microwave signals follow the curvature of earth, this is known as :
When microwave signals follow the curvature of earth, this is known as :
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Which of the following is/are the limitations of amplitude modulation?
Which of the following is/are the limitations of amplitude modulation?
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If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be equal to-
If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be equal to-
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Sinusoidal carrier voltage of frequency 1.5 MHz and amplitude 50 V is amplitude modulated by sinusiodal voltage of frequency 10 kHz producing 50% modulation. The lower and upper side-band frequencies in kHz are
Sinusoidal carrier voltage of frequency 1.5 MHz and amplitude 50 V is amplitude modulated by sinusiodal voltage of frequency 10 kHz producing 50% modulation. The lower and upper side-band frequencies in kHz are
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Range of frequencies allotted for commercial FM radio broadcast is
Range of frequencies allotted for commercial FM radio broadcast is
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Infrared radiation is detected by
Infrared radiation is detected by
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Television signals on earth cannot be received at distances greater than 100 km from the transmission station. The reason behind this is that
Television signals on earth cannot be received at distances greater than 100 km from the transmission station. The reason behind this is that
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A uniform but time varying magnetic field B (t) exists in a circular region of radius a is directed into the plane of the paper as shown. The magnitude of the induced electric field at point P at a distance r from the centre of the circular region.
A uniform but time varying magnetic field B (t) exists in a circular region of radius a is directed into the plane of the paper as shown. The magnitude of the induced electric field at point P at a distance r from the centre of the circular region.
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