List of top Physics Questions

In Young?s double slit experimental setup, if the wavelength alone is doubled, the band width $\beta$ becomes

A bullet when fired into a target loses half of its velocity after penetrating $20\, cm$. Further distance of penetration before it comes to rest is

An engine pumps water continuously through a hose. Water leaves the hose with a velocity $v$ and $m$ is the mass per unit length of the water jet. What is the rate at which kinetic energy is imparted to water?

A ball of mass $m$ is dropped from a height $h$ on a platform fixed at the top of a vertical spring, as shown in figure. The platform is depressed by a distance $x$. Then the spring constant is

The ratio of the intensities of two waves is 16 : 9. The ratio of their amplitudes is

When the temperature of a rod increases from t to t $+ \Delta t$ its moment of inertia increases from I to I + $\Delta I$ . If $\alpha$ be the coefficient of linear expansion of the rod, then the value of $\frac{\Delta I}{I}$ is

The $x-t$ plot shown in the figure below describes the motion of the particle, along $x-axis$, between two positions $A$ and $B$. The particle passes through two intermediate points $P_1$ and $P_2$ as shown in the figure

Two wires with currents $2\,A$ and $1\,A$ are enclosed in a circular loop. Another wire with current $3\, A$ is situated outside the loop as shown. Then $ \oint{\overrightarrow{B}}.\overrightarrow{dl} $ around the loop is

Two perfectly black spheres $A$ and $B$ having radii $8\,cm$ and $2\,cm$ are maintained at temperatures $127^{\circ}C$ and $527^{\circ}C$ respectively. The ratio of the energy radiated by $A$ to that by $B$ is

In frequency modulation

The magnetic flux linked with a coil of $N$ turns of area of cross section $A$ held with its plane parallel to the field $B$ is

Water is heated from $0^\circ\,C$ to $10\, ^\circ\,C$. then its volume

A biconvex lens of focal length f forms a circular image of radius r of sun in focal plane. Then which option is correct ?

The velocity $v$ (in $cm / s$ ) of a particle is given in terms of time $t$ (in seconds) by the equation, $v=a t+\frac{b}{t+c}$ The dimensions of $a, b$ and $c$ are :