List of top Physics Questions asked in LPUNEST

A wave motion has the function \( y = a_0 \sin(\omega t - kx) \). The graph in the figure shows how the displacement \(y\) at a fixed point varies with time \(t\). Which one of the labelled points shows a displacement equal to that at the position \(x = \dfrac{\pi}{2k}\) at time \(t = 0\)?
A particle of mass \(10\,\text{g}\) is in a potential field given by \[ V = (50x^2 + 100)\ \text{J kg}^{-1}. \] The frequency of its oscillation in cycles/sec is:
A motor drives a body along a straight line with a constant force. The power \(P\) developed by the motor must vary with time \(t\) as:
A balloon of mass \(M\) is descending with a constant acceleration \(\alpha\). When a mass \(m\) is released from the balloon, it starts rising with the same acceleration \(\alpha\). Assuming that the volume of the balloon does not change, the value of \(m\) is:
A cubical block of side \(a\) is moving with velocity \(v\) on a horizontal smooth plane as shown in the figure. It hits a ridge at point \(O\). The angular speed of the block after it hits \(O\) is:
A particle of mass \(m = 5\) units is moving with a uniform speed \(v = 3\sqrt{2}\) units in the \(x\!-\!y\) plane along the line \(y = x + 4\). The magnitude of angular momentum about the origin is:
Vectors $\vec a$ and $\vec b$ include an angle $\theta$ between them. If $(\vec a+\vec b)$ and $(\vec a-\vec b)$ respectively subtend angles $\alpha$ and $\beta$ with $\vec a$, then $(\tan\alpha + \tan\beta)$ is:
For motion of an object along the \(x\)-axis, the velocity \(v\) depends on the displacement \(x\) as \[ v = 3x^2 - 2x. \] What is the acceleration at \(x = 2\,\text{m}\)?
A non-uniform rod \(AB\) of weight \(w\) is supported horizontally in a vertical plane by two light strings \(PA\) and \(PB\) as shown in the figure. \(G\) is the centre of gravity of the rod. If \(PA\) and \(PB\) make angles \(30^\circ\) and \(60^\circ\) respectively with the vertical, the ratio \(\dfrac{AG}{GB}\) is:
If \(I_1\) is the moment of inertia of a thin rod about an axis perpendicular to its length and passing through its centre of mass and \(I_2\) is the moment of inertia of the ring about an axis perpendicular to the plane of the ring and passing through its centre, formed by bending the rod, then:
A bullet of mass 50 g is fired from a gun of mass 2 kg. If the total kinetic energy produced is 2050 J, the energy of the bullet and the gun separately are: