List of top Physics Questions

When white light passes through a prism, the deviation is maximum for
Two sound waves with wavelength $5.0 \,m$ and $5.5 \,m$ respectively, each propagate in a gas with velocity $330 \,m/s$. We expect the following number of beats per second
Two particles of equal charges after being accelerated through the same potential difference enter a uniform transverse magnetic field and describe circular path of radii $ {{R}_{1}} $ and $ {{R}_{2}} $ respectively. Then the ratio of their masses $ ({{M}_{1}}/{{M}_{2}}) $ is
Two heater wires, made of the same material and having the same length and the same radius, are first connected in series and then in parallel to a constant potential difference. If the rates of heat produced in the two cases are $H_s$ and $H_p$ respectively, then $H_s /H_p$ will be
Three point charges $+q,-2 q$ and $+q$ are placed at points $(x=0, y=a, z=0),(x=0, y=0, z=0)$ and $(x=a, y=0, z=0)$, respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are
Three charges $ {{Q}_{0}},-q $ and $ -q $ are placed at the vertices of an isosceles right angle triangle as in the figure. The net electrostatic potential energy is zero if $ {{Q}_{0}} $ is equal to
The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be
The refractive index of glass is 1.520 for red light and 1.525 for blue light. Let $ \quad D_{1}$ and $ \quad D_{2}$ be angles of minimum deviation for red and blue light respectively in a prism of this glass, then,:
The potential energy of a 1 kg particle free to move along the x-axis is given by $V \left(x\right)=\left(\frac{x^{4}}{4}-\frac{x^{2}}{2}\right) J\cdot$ The total mechanical energy of the particle is 2 J. Then , the maximum speed (in m/s) is :
The plates of a parallel plate capacitor are not. exactly parallel. The surface charge density
The necessary condition for an interference by two sources of light is that
The magnifying power of a compound microscope increase with
The length of the seconds pendulum is decreased by $0.3\, cm$ when it is shifted to Chennai from London. If the acceleration due to gravity at London is $ 981\,cm/{{s}^{2}}, $ the acceleration due to gravity at Chennai is (assume $ {{n}^{2}}=10 $ )
The length of a given cylindrical wire is increased by 100%. Due to the consequent decrease in diameter the change in the resistance of the wire will be
The electric flux through a closed surface area $S$ enclosing charge $Q$ is $ \phi $ . If the surface area is doubled, then the flux is
Resonant frequency of a series LCR circuit is 600 Hz. Quality factor of the circuit is 4. Band width is
What is the value of inductance L for which the current is a maximum in a series LCR circuit with $ C=10\mu F $ and $ \omega =1000\,{{s}^{-1}} $ ?
Three point charges $ +\,q,-2q $ and $ +q $ are placed at points $ (x=0,y=a,z=0), $ $ (x=0,y=0,z=0) $ and $ (x=a,y=0,z=0), $ respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are
Masses $m$ and $M$ on pulley move $0.6\, m$ in $4\, s$. What is ratio of $ \frac{m}{M} $ ?
In Ramsden eyepiece, the two planoconvex lenses each of focal length $ f $ are separated by a distance $ 12\,cm $ . The equivalent focal length (in $ cm $ ) of the eyepiece is
In a region, steady and uniform electric and magnetic fields are present. These two fields are parallel to each other. A charged particle is released from rest in this region. The path of the particle will be a :
For a system to follow the law of conservation of linear momentum during a collision, the condition is (1) total external force acting on the system is zero. (2) total external force acting on the system is finite and time of collision is negligible. (3) total internal force acting on the system is zero.
Diwali rocket is ejecting 50 g of gases/s at a velocity of 400 m/s. The accelerating force on the rocket will be
When the velocity of projection of a body is made $n$ times, its time of flight becomes $n$ times. Range of projectile does not depend on the initial velocity of a body.
The magnetic field produced by a current carrying solenoid is independent of its length and cross-sectional area. The magnetic field inside the solenoid is uniform.