The maximum velocity of a particle, executing simple harmonic motion with an amplitude 7 mm, is 4.4 m/s. The period of oscillation is
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(a) 100 s (b) 0.01 s (c) 10 s […]
When a mass m is attached to a spring, it normally extends by 0.2 m. The mass m is given a slight extension and released. Its time period will then be
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(a) […]
A ball rolls without slipping. The raidus of gyration of the ball about an axis passing through its centre of mass is K. If the raidus of ball be R, then the fraction of total […]
Mass and diameter of a ring is 2 kg and 1 m respectively. The moment of inertia of ring about an axis is passing through its C.M. and perpendicular to the plane of the ring […]
3 persons are initially at the 3 corners of an equilateral triangle whose side is equal to d. Each person now moves with a uniform speed v in such a way that the first moves […]
The distance travelled by an object along a straight line in time t is given by s=3-4t+5t², the initial velocity of the object is
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(a) 3 unit (b) -3 unit (c) 4 […]
A proton of mass 1.6×10⁻²⁷ kg goes round in a circular orbit of radius 0.10 m under a centripetal force of 4×10⁻¹³ N. The frequency of revolution of the proton is about
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In a uniform circular motion,
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(a) Velocity and acceleration remain constant (b) Kinetic energy remains constant (c) Speed and acceleration change (d) Only velocity changes, acceleration remains constant
Correct Answer:
Kinetic energy […]
Which of the following particles will have minimum frequency of revolution when projected with the same velocity perpendicular to a magnetic field?
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(a) Li⁺ (b) Electron (c) Proton (d) He⁺
Correct Answer: […]
A circular coil of radius 10cm and 100 turns carries a current 1 A. What is the magnetic moment of the coil?
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(a) 3.142×10⁴ A-m² (b) 10⁴ A-m² (c) 3.142 A-m² (d) […]
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