List of top Physics Questions asked in NEET (UG)

The count rate of a Geiger Muller counter for the radiation of a radioactive material of half-life of 30 minutes decreases to 5 second$^{-1}$ after 2 hours. The initial count rate was
A star, which is emitting radiation at a wavelength of $5000$ $�$ is approaching the earth with a velocity of $1.5 \times 10^4m/s.$ The change in wavelength of the radiation as received on the earth is
The earth (mass = $ 6 \times {10}^{24} $ kg) revolves around the sun with an angular velocity of $ 2 \times {10}^{-7} rad/s$ in a circular orbit of radius $ 1.5 \times {10}^8 km$. The force exerted by the sun on the earth, in newton, is
Heat is flowing through two cylindrical rods of the same material. The diameters of the rods are in the ratio 1 : 2 and the lengths in the ratio 2 : 1. If the temperature difference between the ends is same, then ratio of the rate of flow of heat through them will be
Half-life for radioactive $^{14}C$ is 5760 yr. In how many years, 200 mg of $^{14}C$ will be reduced to 25 mg?
The mass number of He is 4 and that of sulphur is 32. The radius of sulphur nucleus is larger than that of helium by the factor of
The acceleration of a particle is increasing linearly with time $t$ as $bt$. The particle starts from origin with an initial velocity $v_0$. The distance travelled by the particle in time t will be
The dimensions of pressure are same as that of
The position vector of a particle is $ \overrightarrow{r} = (a \, \cos \, \omega t) \widehat{i} + (a \sin \omega t) \widehat{j}$. The velocity of the particle is
Percentage error in the measurement of mass and speed are $2\%$ and $3\%$ respectively. The error in the estimation of kinetic energy obtained by measuring mass and speed will be
In an A.C. circuit, the current flowing is \(I=5sin(100 t - \frac{π}{2}) ampere\) and the potential difference is \(V = 200 sin (100 t) volts\). The power consumption is equal to
Two wires of the same metal have same length, but their cross-sections are in the ratio 3 : 1. They are joined in series. The resistance of thicker wire is $10\, \Omega.$ The total resistance of the combination will be
When the key K is pressed at time t = 0, then which of the following statement about the current I in the resistor AB of the given circuit is true?
The dimensions of $RC$ is
A heating coil is labelled 100 W, 220 V. The coil is cut in half and the two pieces are joined in parallel to the same source. The energy now liberated per second is
A $4\, \mu F$ capacitor is charged to 400 V. If its plates are joined through a resistance of $2\,k \Omega$, then heat produced in the resistance is
In the network shown in the figure, each of the resistance is equal to $2\, \Omega.$ The resistance between the points A and B is
There is an electric field E in x-direction. If the work done on moving a charge of 0.2 C through a distance of 2 m along a line making an angle 60$^{\circ}$ with x-axis is 4 J, then what is the value of E?
A charge q is placed at the centre of the line joining two exactly equal positive charges The system of three charges will be in equilibrium, if q is equal to
A simple pendulum with a bob of mass m oscillates from A to C and back to A such B that PB is H. If the acceleration due to gravity is g, then the velocity of the bob as it passes through B is
Ray optics is valid, when characteristic dimensions are
The blue colour of the sky is due to the phenomenon of
A wave of frequency 100 Hz travels along a string towards its fixed end. When this wave travels back, after reflection, a node is formed at a distance of 10 cm from the fixed end. The speed of the wave (incident and reflected) is
The displacement-time graph of a moving particle is shown below. The instantaneous velocity of the particle is negative at the point
The electric and magnetic field of an electromagnetic wave are