List of top Physics Questions asked in Punjab PMET

A wheel is rotating at $ 900\,\,rpm $ about its axis. When the power is cut off it comes to rest in $ 1\min $ . The angular retardation in $ rad/{{s}^{2}} $ is
Galileo writes that for angles of projection of a projectile at angles $\left(45^{\circ}+\theta\right)$ and $\left(45^{\circ}-\theta\right)$, the horizontal ranges described by the projectile are in the ratio
The potential energy of a weightless spring compressed by a distance a is proportional to
The plane of a dip circle is set in the geographic meridian and the apparent dip is $\delta_1$. It is then set in a vertical plane perpendicular to the geographic meridian. The apparent dip angle is $\delta_2$. The diclination $\theta$ at the plane is
Two masses $ M $ and $ m $ are attached to a vertical axis by weightless thread of combined length $ l. $ They are set in rotational motion in a horizontal plane about this axis with constant angular velocity $ \omega $ . If the tensions in the thread are same during motion, the distance of M from the axis is,
The wavelength of the first line of Balmer series is $6563\,??. The Rydberg constant for hydrogen is about
A uniform rope of length $L$, resting on a frictionless horizontal surface, is pulled at one end by a force $F$. The tension in the rope at a distance $I$ from this end is
Bulk modulus of water is $ 2\times 10^{9}N/m^{2}$ . The change in pressure required to increase the density of water by $0.1\%$ is
A body starts to fall freely under gravity. The distances covered by it in first, second and third seconds are in ratio
A body of mass $5\, kg $ is moving with a momentum of $10\,kg\,m/s $ . A force of $ 0.2\,N $ acts on it in the direction of motion of the body for $10\, s$. The increase in its kinetic energy is
A thin circular ring of mass $ M $ and radius $ r $ is rotating about its axis with constant angular velocity $ \omega $ . Two objects each of mass $ m $ , are placed gently at the opposite ends of diameter of the ring. The ring now rotates with an angular velocity
Radius of gyration of disc of mass 50 g and radius 2.5 cm about an axis passing through its center of gravity and perpendicular to the plane is
If $ 70\,cal $ of heat is required to raise the temperature of $2$ mole of an ideal gas at constant pressure from $ 30^{\circ}C $ to $ 35^{\circ}C $ , then the amount of heat required to raise the temperature of same gas through same range at constant volume is
Power supplied to a particle of mass $ 2\,kg $ varies with time as $ P=3{{t}^{2}}/2 $ watt, where t is in second. If velocity of particle at $ t=0 $ is $ v=0, $ the velocity of particle at $ t=2s $ will be
A stone is dropped from a certain height which can reach the ground in $5\,s$. If the stone is stopped after $3\, s$ of its fall and then allowed to fall again, then the time taken by the stone to reach the ground for die remaining distance is
The unit of specific conductivity is
A voltmeter of resistance $ 1000\,\Omega $ gives full scale deflection when a current of $ 100\,mA $ flows through it. The shunt resistance required across it to enable it to be used as an ammeter reading $ 1\,A $ at full scale deflection is
Two point-charges $ \pm 10\mu C $ are placed $ 5.00\,mm $ apart, forming an electric dipole. Compute electric field at a point on the axis of the dipole $ 15\,cm $ away from the centre on a line passing through the centre dipole.
A short bar magnet placed with its axis at $ 30^{\circ} $ with a uniform external magnetic field of $ 0.16\,T $ experiences a torque of magnitude $ 0.032\,J $ . The magnetic moment of the bar magnet will be
A bar magnet of length $3\, cm$ has points $A$ and $B$ along its axis at distances of $24 \,cm$ and $48\, cm$ on the opposite sides. Ratio of magnetic fields at these points will be
Binding energy of nucleus is defined as
A thin convergent glass lens $ \mu =1.5 $ has a power of $ +5.0\,D $ . When this lens is immersed in a liquid of refractive index $ \mu _{1} $ it acts as a diverging lens of focal length $ 100\,cm $ . The value of $ \mu _{l} $ should be
An inductor $ L,\,\,a $ capacitor of $ 20\mu F $ and a resistor of $ 10\Omega $ are connected in series with an $AC$ source of frequency $ 50\,Hz $ . If the current is in phase with the voltage, then the inductance of the inductor is
A rifle shoots a bullet with a muzzle velocity of $ 500\,m{{s}^{-1}} $ at a small target $ 50\,m $ away. To hit the target the rifle must be aimed (take$ g=10\,m{{s}^{-2}}) $
In an $ AC $ circuit the potential difference V and current i are given respectively by $ V=100\sin (100t) $volt and $ i=100\sin \left( 100t+\frac{\pi }{3} \right)mA $ The power dissipated in the circuit will be