Physics MCQs

How is the focal length ($f$) related to the radius of curvature ($r$) in a spherical convex mirror?

What characteristic remains constant when a longitudinal wave travels through a medium, causing particles to oscillate harmonically?

A 5 kg object is thrown upwards with air resistance providing a constant 10 N retarding force. What is the ratio of the ascent time to the descent time? (Use $g = 10 m/s^2$)

Temperature scales P and Q have 150 and 100 equal divisions, respectively, between fixed points. If $T_P$ and $T_Q$ denote temperatures on the two scales, which conversion formula is correct?

In a uranium radioactive series, $^{238}{92}U$ decays to $^{206}{82}Pb$. How many alpha and beta particles are emitted in this process?

A container holds 1 mole of oxygen and 2 moles of nitrogen at 300 K. What is the ratio of the average rotational kinetic energy per oxygen molecule to that per nitrogen molecule?

Two organ pipes of same length and material have different radii. When emitting fundamental notes, which pipe produces a note of smaller frequency?

The position of an electron moving along the x-axis is given by $x = 20te^{-t}$ m. How far from the origin does the electron momentarily stop?

The electric potential at a point P due to a point charge of $5 \times 10^{-9}$ C is 50 V. What is the distance of P from the charge? (Assume $\frac{1}{4\pi\epsilon_0} = 9 \times 10^9 Nm^2C^{-2}$)

In Young's double-slit experiment, the intensity at a point is $\frac{1}{4}$ of the maximum intensity. What is the angular position of this point?

A projectile is launched at 30° from the horizontal with an initial velocity of 40 m/s. What is its velocity 2 seconds after launch? (Assume $g = 10 m/s^2$)

The displacement of a particle is given by $y = 3\cos(\frac{\pi}{4} - 2\omega t)$. What type of motion does the particle exhibit?

A monochromatic neon lamp with wavelength 670.5 nm has a stopping voltage of 0.48 V on a photosensitive material. What is the stopping voltage if the wavelength is changed to 474.6 nm?

A stone of mass $m$ is tied to a string of length $l$ and rotated in a circular path at constant speed $v$. What is the torque on the stone?

A spring with spring constant $k$ is hung from the ceiling, and a mass $M$ is attached, released from an unstretched position. What is the maximum extension in the spring?

If E, L, M, and G represent energy, angular momentum, mass, and gravitational constant, respectively, what are the dimensions of P in the formula $P = \frac{EL^2}{M^5G^2}$?

A 70 kg garden roller is pushed with a 200 N force at 30° to the horizontal. What is the normal reaction force on the roller? (Assume $g = 10 m/s^2$)

A convex lens is in contact with a concave lens. The magnitude of the ratio of their powers is $\frac{2}{3}$. If their equivalent focal length is 30 cm, what are their individual focal lengths (in cm)?

A capillary tube is dipped in a water vessel in a lift accelerating upwards at 2g. How does the water rise in the tube compared to normal conditions?

A particle moves under a force $F = Cx$ from $x = 0$ to $x = x_1$. What is the work done?

A vessel of depth 'd' is half-filled with oil (refractive index $n_1$) and half with water (refractive index $n_2$). What is the apparent depth when viewed from above?

Metallic spheres A and B, identical in mass, are given equal amounts of positive and negative charge, respectively. How are their masses affected?

An insect climbs a hemispherical ditch of radius 1 m. It slips after reaching height h. If the friction coefficient is 0.75, what is h?

What is the equivalent capacitance of two capacitors in series, both with capacitance C, connected in series with another capacitor of value C?

If eight identical mercury drops with equal charge combine, how does the capacitance of the bigger drop compare to each small drop?

A ball of mass M strikes a ball of mass m at rest. They separate perpendicularly. What is the coefficient of impact (e)?

For a gas with linearly changing pressure and volume (no heat exchange), what is the change in internal energy?

Hydrogen atoms in the ground state are excited by 12.1 eV photons. How many spectral lines will be emitted, according to Bohr's theory?

Two circular rings, A and B, have the same mass but radii $r$ and $2r$ respectively. What is the ratio of the moment of inertia of A to that of B, about an axis through their center of gravity and perpendicular to their plane?

A planet has a mass 9 times Earth's and a radius 4 times Earth's. What is its escape velocity in km/s, given Earth's is 11.2 km/s?

In a Wheatstone bridge, three arms have resistances P, Q, and R. The fourth has parallel resistors $S_1$ and $S_2$. What is the balanced bridge condition?

Two bodies of 1 kg and 3 kg mass have position vectors $\hat{i} + 2\hat{j} + \hat{k}$ and $-3\hat{i} - 2\hat{j} + \hat{k}$ respectively. What is the magnitude of the position vector of the center of mass, similar to which vector?

A charged particle's energy from a cyclotron with B=magnetic induction and R=radius of Circular path is given by which formula?

If the intensity of a laser is 53.10 W/m², what is the electric field amplitude?

The potential energy of a satellite that has mass m and rotating at the height of $6.4x10^6$ m from the Earth surface is

What is the oscillation frequency of an electron with energy of 0.1 keV in perfect relation to the Earth's $1 \times 10^{-4}$ magnetic field.

In an RLC set with Vm as the amplitude and frequency $\omega = \frac{1}{\sqrt{LC}}$ and current, what expresses the state’s quality factor?

If you set the magnetic field relation and calculate the magnetic strength for a circular center of loop that equals x, what could that ration be?

What should be the parallel cylinder in a uniform axis if B represents the uniform magnetic field?

With a .7mm shift in density in $H_2O$, find the H2O flow?

If we link the magnetic vector in uniform magnetic field of A, what statement aligns with that vector?

What value will the RMS in the circuit carry if there is an LCR of 110$\Omega$ resistance and the supply delivers 220V at a frequency of 300 rad/s?

If we allow a material with the same Radius with the quantity of R being set as 3R to fall in liquid on density $\sigma$, what velocities does it carry?