List of top Physics Questions asked in BHU UET

The speed of earth's rotation about its axis is co. Its speed increases to $ x $ times to make effective acceleration due to gravity equal to zero at the equator, $ x $ is
In a simple pendulum the breaking strength of the string is double the weight of the bob. The bob is released from rest when the string is horizontal. The string breaks when it makes an angle $ \theta $ With the vertical
Two pendulums of lengths 100 cm and 121 cm start vibrating. At some instant the two are at the mean position in the same phase. After how many vibrations of the longer pendulum will the two be in the same phase at the mean position again?
Two masses of 10 kg and 20 kg respectively are tied together by a massless spring. A force of 200 N is applied on a 20 kg mass as shown in figure. At the instant shown the acceleration of 10 kg mass is $ 12\text{ }m/{{s}^{2}}, $ the acceleration of 20 kg mass is
Heat absorbed by a mass of 1 g of helium, when its temperature rises from $ 11{}^\circ C $ to $ 131{}^\circ C $ at constant volume, is H. Heat absorbed by 7 g of nitrogen, when its temperature rises from $ 11{}^\circ C $ to $ 71{}^\circ C $ at constant volume, is $ {{H}_{N}} $ . The ratio of H to $ {{H}_{N}} $ is
Forces 5 N, 12 N and 13 N are in equilibrium. If $ sin\text{ }23{}^\circ =\frac{5}{13}, $ the angle between 5 N force and 13 N force is
The charge flowing in a conductor varies with time as $ Q=at-b{{t}^{2}}, $ then the current changes at the rate of $ (-2b) $ falls to zero after $ T=\left( \frac{a}{2b} \right) $ (3) reaches a maximum and then decreases (4) will remain constant
A wooden block of mass $M$ resting on a rough horizontal surface is pulled with a force $F$ at an angle with the horizontal. If $ \mu $ is the coefficient of kinetic friction between the block and the surface, then acceleration of the block is
In a sample of radioactive material, what fraction of the initial number of active nuclei will remain disintegrated after half of a half-life of the sample?
Dimensions of $ \frac{L}{RCV} $ are
A charged particle is free to move in an electric field. It will travel
An electron moving with the speed $5 \times 10^{6}$ per sec is shooted parallel to the electric field of intensity $1 \times 10^{3} \,N / C$. Field is responsible for the retardation of motion of electron. Now evaluate the distance travelled by the electron before coming to rest for an instant (mass of $e=9 \times 10^{-31} \,kg$, charge $\left.=1.6 \times 10^{-19} \,C \right)$
An $8\, \mu F$ capacitor is connected across $220\,V, 50 \,Hz $ line. What is the peak value of the charge through capacitor?
The time period of a simple pendulum of length $L$ as measured in an elevator descending with acceleration $ \frac{g}{3} $ is
Two instruments having stretched strings are being played in unison. When the tension of one of the instruments is increased by $1\%, 3$ beats are produced in $2\,s$ . The initial frequency of vibration of each wire is:
Two conducting spheres of radii $R_{1}$ and $R_{2}$ are charged with charges $Q_{1}$ and $Q_{2}$ respectively. On bringing them in contact, there is
The minimum energy to ionize an atom is the energy required to
The moment of inertia of a uniform thin rod of length $L$ and mass $M$ about an axis passing through a point at a distance of $ \frac{L}{3} $ from one of its ends and perpendicular to the rod is
An electric immersion heater of $1.08 \,kW$ is immersed in water. After the water has reached a temperature of $ 100^{\circ }\,C, $ how much time will be required to produce $100\, g $ of steam?
A wire carrying current $i$ and other carrying $2i$ in the same direction produce a magnetic field $B $ at the midpoint. What will be the field when $2i$ current is switched off?
A closed vessel contains $8\, g$ of oxygen and $7\,g$ of nitrogen. The total pressure is $10$ atm at a given temperature. If now oxygen is absorbed by introducing a suitable absorbent the pressure of the remaining gas (in atm) will be
A charged particle enters in a magnetic field $H$ with its initial velocity making an angle of $45^{\circ}$ with $H$. The path of the particle will be
The temperature (T) dependence of resistivity (p) of a semiconductor is represented by
An athlete throws a discus from rest to a final angular velocity of $15\, rad\, s ^{-1}$ in $0.270\, s$ before releasing it. During acceleration, discus moves a circular arc of radius $0.810 \,m$. Acceleration of discus before it is released is
An oxide coated filament is useful in vacuum tubes because essentially