List of top Questions asked in BHU UET- 2010

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
Calorie is defined as the amount of heat required to raise the temperature of $1 \,g$ of water by $1^{\circ} C$ and it is defined under which of the following conditions?