Question Answers

A tuning fork of frequency 200 Hz is in unison with a sonometer wire. How many beats are heard in 30 s if the tension is increased by 1% (in terms of * 10) A tuning fork of frequency 200 Hz is in unison with a sonometer wire. How many beats are heard in 30 [...]

Two large vertical and parallel metal plates having a separation of 1cm are connected to a DC voltage source of potential difference X. A proton is released at rest midway between the two plates. It is found to move at 45∘ to the vertical JUST after release. Then X is nearly A charge Q is [...]

Three concentric metal shells A, B and C of respectively radii a, b and c (a<b<c) have surface charge densities +σ, −σ and +σ respectively. The potential of shell B is? −σ and +σ respectively. The potential of shell B is? b and c (a<b<c) have surface charge densities +σ B and C of respectively [...]

Consider a thin spherical shell of radius R with its center at the origin, carrying uniform positive surface charge density. The variation of the magnitude of the electric field and the electric potential V(r) with the distance r from the center, is best represented by which graph carrying uniform positive surface charge density. The variation [...]

A uniformly charged solid sphere of radius R has potential V0 (measured with respect to ∞) on its surface. For this sphere the equipotential surfaces with potentials 3 V0/2,5 V0/4, 3 V/04 and V0/4 have radius R1 ,R2 ,R3 and R4 respectively. Then 3 V/04 and V0/4 have radius R1 5 V0/4 A uniformly charged [...]

The standing wave pattern shown in the tube has a wave speed of 5.0 m/s. What is the frequency of the standing wave ( in Hz approx.) ? The standing wave pattern shown in the tube has a wave speed of 5.0 m/s. What is the frequency of the standing wave ( in Hz approx.) [...]

Assume that an electric field E = 30 x^2 i exists in space . Thenm the potential diffeence Va- Vo, where Vo is teh potential at teh origin and V a the potential at x = 2 m is Assume that an electric field E = 30 x^2 i exists in space . Thenm the [...]

For a certain organ pipe, three successive resonance observed are 425, 595 and 765 Hz. Taking the speed of sound to be 340 m/s, find the length of the pipe, in meter. 595 and 765 Hz. Taking the speed of sound to be 340 m/s find the length of the pipe For a certain organ [...]

Two identical sinusoidal waves travel in opposite direction in a wire 15 m long and produce a standing wave in the wire. If the speed of the waves is 12 m/s and there are 6 nodes Two identical sinusoidal waves travel in opposite direction in a wire 15 m long and produce a standing wave [...]

In the experiment for the determination of the speed of sound in air using the resonance column method, the length of the air column that resonates in the fundamental mode, with a tuning fork is 0.1 m. When this length is changed to 0.35 m, the same tuning fork resonates with the first overtone. Calculate [...]