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Velocity of disturbance transmitted in a medium is called ___ velocity .

Equal masses of two liquids $\text{A}$ and $\text{B}$ contained in vessels of negligible heat capacities are supplied heat at the same rate. The temperature time graphs for the two liquids are shown in the figure.

If $S$ represents specific heat and $L$ represents latent heat of liquid, then -

Nuclear fusion

A transistor-oscillator using a resonant circuit with an inductor $L$ (of negligible resistance) and a capacitor $C$ in series produces oscillations of frequency $f$. If $L$ is doubled and $C$ is changed to $4C$, the frequency will be

A block of mass $m$ containing a net positive charge $q$ is placed on a smooth horizontal table which terminates in a vertical wall as shown in figure. The distance of the block from the wall is d. A horizontal electric field $E$ towards right is switched on. Assuming elastic collision (if any), the time period of resulting oscillatory motion is

Two tuning forks when sounded together produced a beat with frequency of 4 Hz. The frequency of one fork is 256 Hz. The number of beats heard increases when the fork of frequency 256 Hz is loaded with wax. The frequency of the other fork is,

During thunderstorms clouds produce electricity. Rain water conduct electricity . then why don't electricity flow down through rain from the clouded.why don't we get shocks when we stand under rain?

A piece of ice of mass 40 g is dropped into 200 g of water at 50°C. Calculate the final temperature of water after all the ice has melted. Specific heat capacity of water = 4200 J/kg^oC , Specific latent heat of fusion of ice = 336 x 10³ J/kg.

Sky looks blue due to:

Fuse wire is connected in series with

The area of a square of side $14cm$ will be:

A ray of light of wavelength 4800 Angstrom suffers refraction from air to glass. Taking ${}_a{\mu }_g$​ = $\frac{3}{2}$, find the wavelength of light in glass.

Suppose the gravitational force varies inversely as the nth power of distance. Then the time period of a planet in circular orbit of radius R around the sun will be proportional to

I want some trick to learn the Ray diagrams and solve the problems on it

Which organization launched Chandrayaan and when? Which all space agencies was a part of this mission?

(a) Construct ray diagrams to illustrate the formation of a virtual image using (1) a converging lens, and (ii) a diverging lens. (b) What is the difference between the two images formed above ?

Consider the situation shown in figure, water $({\mu }_w=4/3)$ is filled in a beaker up to a height of $10\text{cm}$. A plane mirror fixed at a height of $5\text{cm}$ from the surface of water. Distance of image from the mirror after reflection from it of an object $O$ at the bottom of the beaker is

Three $60\text{W}$ bulbs are mistakenly wired in series and connected to a $120\text{V}$ power supply. Assume that, the bulbs are rated for single connection to $120\text{V}$ with the mistaken connection, the power dissipated across each bulb is

A prism $(\mu =1.5)$ has the refracting angle of 30°. The deviation of a monochromatic ray incident normally on its one surface will be (sin 48° 36' = 0.75), The angle of deviation is

Two bulbs marked 200 watt-250 volts and 100 watt-250 volts are joined in series to 250 volts supply. Power consumed in circuit is:

What is energy conservation?

Resistors $R_1$=10 $\Omega$, $R_2$=4 $\Omega$, $R_3$ = 30 $\Omega$, $R_4$ = 20 $\Omega$, $R_5$ = 60 $\Omega$ and a 12 volt battery is connected as shown. Calculate:
(a) the total resistance
(b) the total current flowing in the circuit

In a transformer, there are $10,000$ turns in primary coil and $25,000$ turns in secondary coil. An alternating voltage, $E=50\sin \left(\pi t\right)$ is applied across the primary coil. Find the peak voltage across the secondary coil, in ideal conditions.

Ability of the eye to see objects at all distance is called –