List of top Physics Questions

Two springs A and B having spring constant K$_A$ and K$_B$ (K$_A$ = 2K$_B$) are stretched by applying force of equal magnitude. If energy stored in spring A is E$_A$ then energy stored in B will be
ABCD is a square loop made of an uniform conducting wire. The current enters the loop at A and leaves at D. The magnetic field is
A projectile is moving at $20\,m\,s^{-1}$ at its highest point, where it breaks into two equal parts due to an internal explosion. One part moves vertically up at $30\,m\,s^{-1}$ with respect to the ground. Then the other part will move at
A ray of light passes through four transparent media with refractive indices $\mu_1,\mu_2,\mu_3$ and $\mu_4$ as shown in the figure. The surfaces of all media are parallel. If the emergent ray CD is parallel to the incident ray AB, we must have
In a Young's double slit experiment, 12 fringes are observed to be formed in a certain segment of the screen when light of wavelength 600 nm is used. If the wavelength of light is changed to 400 nm, number of fringes observed in the same segment of the screen is given by
Ratio of kinetic energy and rotational energy in the motion of a disc is:
Optical fibre are based on
If |A →+ B→| = |A→|= |B→| then angle between A and B will be
A ray of light travelling in air haves wavelength λ, frequency n, velocity v and intensity I. If this ray enters into water then these parameter are λ', n' , v' and I' respectively. Which relation is correct
A disc is placed on a surface of pond which has refractive index 5/3.A source of light is placed 4 m below the surface of liquid. The minimum radius of disc will be so light is not coming out
The total energy of particle performing SHM depend on
Two circular coils can be arranged in any of the three situations shown in the figure. Their mutual inductance will be
A battery of emf 10V and internal resistance 0.5 ohm is connected across a variable resistance R. The value of R for which the power delivered in it is maximum is given by :
A wire of length $L$ and $3$ identical cells of negligible internal resistances are connected in series. Due to the current, the temperature of the wire is raised by $\Delta T$ in a time $t$. A number $N$ of similar cells is now connected in series with a wire of the same material and cross-section but of length $4\,L$. The temperature of the wire is raised by the same amount $\Delta T$ in the same time. The value of $N$ is
In the given circuit, it is observed that the current I is independent of the value of the resistance $R_6$. Then, the resistance values must satisfy
Electric appliances with metallic body e.g., heaters, presses etc., have three pin connections, whereas an electric bulb has a two pin connection. Three pin connections reduce heating of connecting cables.
A particle executes simple harmonic motion between x = - A and x = + A. The time taken for it to go fromO to A /2 is $T_1$ and to go from $ A/2 \, \, to \, \, A \, is \, T_2, $ then
A charge is placed at the centre of cube of side a then flux linked with one of its given faces will be
If a charged spherical conductor of radius 10 cm has potential V at a point distant 5 cm from its centre, then the potential at a point distant 15 cm from the centre will be:
The working principle of a ball point pen is:
Energy per unit volume for a capacitor having area A and separation d kept at potential difference V is given by
A parallel plane condenser is filled with two dielectrics as shown in figure. Area of each plate is A in m2 and the separation is d metre. The dielectric constants are $ {{K}_{1}} $ and $ {{K}_{2}} $ respectively. Its capacitance in farad will be:
A uniform electric field pointing in positive x-direction exists in a region let Abe the orgin B be the point on the x-axis at x = +1 cm and C be the point on the Y axis at y = +1cm. Then the potentials at the points A, B and C satisfy
From the figure find the capacitance of the capacitor?
If a unit positive charge is taken from one point to another over an equipotential surface, then