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Two vibrating strings of the same material but lengths L and 2L have radii 2r and r respectively. They are stretched under the same tension. Both the strings vibrate in their fundamental modes, the one of length L with frequency n1 and the other with frequency n2. The ratio n2/n1 is
17
Sep
Two vibrating strings of the same material but lengths L and 2L have radii 2r and r respectively. They are stretched under the same tension. Both the strings vibrate in their fundamental modes, the one of length L with frequency n1 and the other with frequency n2. The ratio n2/n1 is the one of length [...]
Two wires are kept tight between the same pair supports. The tensions in the wires are in the ration 2:1, the radii are in the ratio 3:1 and the densities are in the ratio 1:2. The ratio of their fundamental frequencies
17
Sep
Two wires are kept tight between the same pair supports. The tensions in the wires are in the ration 2:1, the radii are in the ratio 3:1 and the densities are in the ratio 1:2. The ratio of their fundamental frequencies the radii are in the ratio 3:1 and the densities are in the ratio [...]
Four equal charges Q are placed at the four corners of a square of each side is ‘a’ . work done in removing a charge -Q from its centre to infinity is
17
Sep
Four equal charges Q are placed at the four corners of a square of each side is ‘a’ . work done in removing a charge -Q from its centre to infinity is Four equal charges Q are placed at the four corners of a square of each side is 'a' . work done in removing [...]
A string is stretched between fixed points separated by 75 cm. It is observed to have resonant frequencies of 420 Hz and 315 Hz. There are no other resonant frequencies between these two. Then, the lowest resonant frequency for this string is
17
Sep
A string is stretched between fixed points separated by 75 cm. It is observed to have resonant frequencies of 420 Hz and 315 Hz. There are no other resonant frequencies between these two. Then, the lowest resonant frequency for this string is A string is stretched between fixed points separated by 75 cm. It is [...]
There is an electric field E in X = direction. If work done in moving a charge 0.2 C through a distance of 2m along a line making an angle of 60 degree with X−axis is 4.0 joule, what is the value of E?
17
Sep
There is an electric field E in X = direction. If work done in moving a charge 0.2 C through a distance of 2m along a line making an angle of 60 degree with X−axis is 4.0 joule, what is the value of E? There is an electric field E in X = direction. If [...]
A particle whose speed is 50 m/s moves along the line from A (2,1) to b(9,25). Find the velocity vector in the form of ai + bj.
17
Sep
A particle whose speed is 50 m/s moves along the line from A (2,1) to b(9,25). Find the velocity vector in the form of ai + bj. 1) to b(9 25). Find the velocity vector in the form of ai + bj. A particle whose speed is 50 m/s moves along the line from A [...]
Two infinite plane sheets A and B are shown in the figure the surface charge densities on A and B are (2/π)×10^−9 C/m^2 and (−1/π) × 10^−9 C/m^2 respectively .C,D, E are three points where electric fields (in N/C) are EC, EDa nd EE repectively.
17
Sep
Two infinite plane sheets A and B are shown in the figure the surface charge densities on A and B are (2/π)×10^−9 C/m^2 and (−1/π) × 10^−9 C/m^2 respectively .C,D, E are three points where electric fields (in N/C) are EC, EDa nd EE repectively. D E are three points where electric fields (in N/C) [...]
The position vectors of two balls are given by r1 = 2 (m)i + 7 (m) j r2 = -2 (m)i + 4 (m)j What will be the distance between the two balls?
17
Sep
The position vectors of two balls are given by r1 = 2 (m)i + 7 (m) j r2 = -2 (m)i + 4 (m)j What will be the distance between the two balls? The position vectors of two balls are given by r1 = 2 (m)i + 7 (m) j r2 = -2 (m)i + [...]
Two horizontal forces of magnitudes 10 N and P N act on a particle. The force of magnitude 10 N acts due west and the force of magnitude P N acts on a bearing of 30 east of north as shown in figure.
17
Sep
Two horizontal forces of magnitudes 10 N and P N act on a particle. The force of magnitude 10 N acts due west and the force of magnitude P N acts on a bearing of 30 east of north as shown in figure. Two horizontal forces of magnitudes 10 N and P N act on [...]
A very long uniformly charged cylinder (radius R) has a surface charge density σ . A very long uniformaly charged line charge( linear charge density λ) is placed along the cylinder axis. If electric field intensity vector outside the cylinder is zero then :
17
Sep
A very long uniformly charged cylinder (radius R) has a surface charge density σ . A very long uniformaly charged line charge( linear charge density λ) is placed along the cylinder axis. If electric field intensity vector outside the cylinder is zero then : Two concentric conducting thin spherical shells A and B having radii [...]