Question
The distance between two consecutive crests in a wave train produced in a string is $5 cm.$ If $2$ complete waves pass through any point per second, the velocity of the wave is ..... $cm/sec$
✓
Answer
(a) $v = n\lambda = 2 \times 5 = 10\,cm/sec$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Two charged particles, each with a charge of $+q$, are located along the $x$ -axis at $x = 2$ and $x = 4$, as shown below. Which of the following shows the graph of the magnitude of the electric field along the $x$ -axis from the origin to $x = 6$?
→Given that $1\,g$ of water in liquid phase has volume $1\,cm^3$ and in vapour phase $1671\, cm^3$ at atmospheric pressure and the latent heat of vaporization of water is $2256\,J/g;$ the change in the internal energy in joules for $1\,g$ of water at $373\,K$ when it changes from liquid phase to vapour phase at the same temperature is ....... $J$
→The input and the output wave form of a logic gate is shown in diagram, then identify the logic gate
If $L , C$ and $R$ are the self inductance, capacitance and resistance respectively, which of the following does not have the dimension of time?
→The focal length of a planoconvex glass lens is $20 \,cm \left(\mu_g=1.5\right)$. The plane face of it is silvered. An illuminating object is placed at a distance of $60 cm$ from the lens on its axis along the convex side. Then the distance (in $cm$ ) of the image is .........
→A potentiometer wire is $100\,\, cm$ long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at $50\,\, cm$ and $10\,\, cm$ from the positive end of the wire in the two cases. The ratio of emf's is
→The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom, is:
A body of mass $60 g$ experiences a gravitational force of $3.0 N$, when placed at a particular point. The magnitude of the gravitational field intensity at that point is ..... $N/ kg$
→ If $N$ is the number of turns in a coil, the value of self inductance varies as
→The study of physical phenomenon at low temperatures (below liquid nitrogen temperature) is called