List of top Physics Questions

In the figure a block of weight $60\,N$ is placed on a rough surface. The coefficient of friction between the block and the surface is $0.5$. The weight $W$ such that the block does not slip on the surface is
In the dead beat galvanometer, the coil is wound on a frame made of :
In the common emitter configuration of n-p-n transistor $10^{10}$ electrons enter the emitter in 1 $\mu s$ and 2% of the electrons are lost to the base, the current gain of the amplifier is
In the Bohr model of the hydrogen atom, the lowest orbit corresponds to
In the above graph, point B indicates
In stationary waves, nodes are the points where there is
In sky-wave propagation, skip-distance depends on :
In SI, the unit of latent heat is
In SI, unit of quantity of heat is
In single slit diffraction pattern
In Rutherford experments on $\alpha$ - ray scattering the number of particles scattered at $90^\circ$ be 28 per minute. Then the number of particles scattered per minute by the same foil but at 60$^\circ$ are
In positive logic, the logic state 1 corresponds to
In $p-n-p$ transistor circuit, the collector current is $10\, mA$. If $90\%$ of the holes reach the collector, the emitter and base currents respectively are
In mixture of ideal gases, the molecules have the same
In Geiger-Marsden scattering experiment, the trajectory traced by an $\alpha$ -particle depends on
In an organ pipe of length $L$ open at both ends, the fundamental mode has a frequency (where $v$ is a speed of sound in air)
In an inductor of self-inductance $L = 2\, mH$, current changes with time according to relation, $I=t^{2}e^{-t}$ At what time emf is zero?
In an LCR series a.c. circuit, the voltage across each of the components L, C and R is 50 V. The voltage across LC combination will be
In an oscillating L-C circuit the maximum charge on the capacitor is The charge on the capacitor when the energy is stored equally between the electric and magnetic field is :
In an experiment on the specific heat of a metal, a $0.20\,kg$ block of the metal at $150^\circ$C is dropped in a copper calorimeter (of water equivalent $0.025 kg$) containing $150\,cm^3$ of water at $27^\circ$C. The final temperature is $40^\circ$C. The specific heat of the metal is
In an experiment on a-particle scattering, $\alpha$-particles are directed towards a gold foil and detectors are placed in position $P,Q$ and $R$. What is the distribution of $\alpha$-particles as recorded at $P, Q$ and $R$?
In an experiment, the angles are required to be measured using an instrument. $29$ divisions of the main scale exactly coincide with the $30$ divisions of the vernier scale. If the smallest division of the main scale is half -a-degree $(0.5^?)$, then the least count of the instrument is
In an AM wave, the information is contained within
In an a.c. circuit, V and I are given by V = 100 sin (100t) volt I = 100 sin (100t + $\pi$/3) mA Then the power dissipated in the circuit is
In $\alpha$ - ray scattering, the scattering angle $(\theta)$ for impact parameter (b) to become zero is