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Five sinusoidal waves have the same frequency 500 Hz but their amplitudes are in the ratio 2 : 1 / 2 : 1 /2 : 1 : 1 and their phase angles 0 , pie/6, pie/3, pie/2 and pie, respectively. Five sinusoidal waves have the same frequency 500 Hz but their amplitudes are in the [...]

A uniform electric field E0 exists in a region at angle 45 degree with the x – axis. There are two points A ( a, 0 ) and B ( 0, b ) having potential Va and Vb , respectively, then 0 ) and B ( 0 A uniform electric field E0 exists in a [...]

What should be the maximum acceptance angle at the aircore interface of an optical fibre if n1 and n2 are the refractive indices of the core and the cladding, respectively-duplicate-1-duplicate-1 respectively What should be the maximum acceptance angle at the aircore interface of an optical fibre if n1 and n2 are the refractive indices of [...]

A point source of sound is placed in a non-absorbing medium. Two points A and B are at the distance of 1 m and 2 m, respectively, from the source. The ratio of amplitudes of waves A point source of sound is placed in a non-absorbing medium. Two points A and B are at the [...]

The electric field E is measured at a point P(0, 0, d) generated due to various charge distributions and the dependence of E on d is found to be different for different charge distributions. List – I contains different relations between E and d. List – II describes different electric charge distributions, along with their [...]

An infinitely long thin non-conduction wire is parallel to the z-axis and carries a uniform line charge density λ. It pierces a thin non-conducting spherical shell of radius r in such a way that that the are PQ subtends an angle 120∘ at the centre O of the spherical shell, as shown in the figure. [...]

Two non-conducting spheres of radii R1 and R2 and carrying uniform volume charge densities +ρ and −ρ, respectively, are placed such that they partially overlap, as shown in the figure. At all points in the overlapping region are placed such that they partially overlap as shown in the figure. At all points in the overlapping [...]

Three large identical conducting parallel plates carrying charge +Q , -Q and +2Q, respectively , are placed as shown in figure. If Ea, Eb, and Ec refer to the magnitudes of the electric fields at points A, B , and C, respectively, then -Q and +2Q and C and Ec refer to the magnitudes of [...]

A man walks on a straight road from his home to a market 2.5 km away with a speed of 5 km/h. Finding the market closed, he instantly turns and walks back home with a speed of 7.5 km/h . What is the (a) magnitude of average velocity, and (b) average speed of the man [...]

Two towns A and B are connected by a regular bus service with a bus leaving in either direction every T minutes. A man cycling with a speed of 20 km/h in the direction A to B notices that a bus goes past him every 18 min in the direction of his motion, and every [...]