List of top Physics Questions

In the vector model of angular momentum applied to atoms, what is the minimum angle in degrees (in integer) made by the orbital angular momentum vector and the positive z axis for a $2p$ electron?
For a transistor amplifier, the frequency response is such that the mid band voltage gain is 200. The cutoff frequencies are 20 Hz and 20 kHz. What is the ratio (rounded off to two decimal places) of the voltage gain at 10 Hz to that at 100 kHz?
It is given that the electronic ground state of a diatomic molecule $X_2$ has even parity and the nuclear spin of $X$ is 0. Which one of the following is the CORRECT statement with regard to the rotational Raman spectrum ($J$ is the rotational quantum number) of this molecule?
Which of the following options represent(s) linearly independent pair(s) of functions of a real variable $x$?
Which of the following is/are the CORRECT option(s) for the Joule-Thomson effect?
The deuteron is a bound state of a neutron and a proton. Which of the following statements is/are CORRECT?
The Geiger-Muller counter is a device to detect \(\alpha\), \(\beta\), and \(\gamma\) radiations. It is a cylindrical tube filled with monatomic gases like argon, and polyatomic gases such as ethyl alcohol. The inner electrode is along the axis of the cylindrical tube and the outer electrode is the tube. Which of the following statements is/are CORRECT?
A compound consists of three ions X, Y, and Z. The Z ions are arranged in an FCC arrangement. The X ions occupy \(\frac{1}{6}\) of the tetrahedral voids and the Y ions occupy \(\frac{1}{3}\) of the octahedral voids. Which one of the following is the CORRECT chemical formula of the compound?
Which one of the following is a dimensionless constant?
The atomic number of an atom is 6. What is the spectroscopic notation of its ground state, according to Hund’s rules?
Total impedance of a series LCR circuit varies with angular frequency of the AC source connected to it as shown in the graph. The quality factor Q of the series LCR circuit is
Graph of LCR circuit
A metal wire has mass (0.4±0.002)g, radius (0.3±0.001)mm and length (5±0.02)cm. The maximum possible percentage error in the measurement of density will nearly be:
A parallel plate capacitor of capacitance C1 with a dielectric slab in between its plates is connected to a battery. It has a potential difference V1 across its plates. When the dielectric slab is removed, keeping the capacitor connected to the battery, the new capacitance and potential difference are C2 and V2 respectively. Then,

A projectile is thrown at a speed V and at an angle with the horizontal. If the speed at its maximum height is \(\frac{V}{3}\),then the value of tan θ is: 

A bullet is fired from a gun at the speed of 280 ms-1 in the direction 30° above the horizontal. The maximum height attained by the bullet is
(g = 9.8 ms-2, sin 30° = 0.5)
A charged particle is subjected to acceleration in a cyclotron as shown. The charged particle undergoes increase in its speed
charged particle is subjected to acceleration in a cyclotron
A ball is projected from the ground with a speed $15\, ms ^{-1}$ at an angle $\theta$ with horizontal so that its range and maximum height are equal, then'tan $\theta$ ' will be equal to

A series LCR circuit is connected to a 45 sin (ωt) volt source. The resonant angular frequency of the circuit is 105 rad/sec and the current amplitude at resonance is I0. When the angular frequency of the source is ω = 8 x 104 rad/sec, the current amplitude in the circuit is 0.05 I0. If m = 50 mH, match each entry in the list - I with an approximate value from list - II and choose the option.

 List - I List - II
(P)I0 in mA(1)44.4
(Q)The quality factor of the circuit(2)18
(R)The bandwidth of the circuit in rad/sec(3)400
(S)The peak power dissipated at resonance in watt(4)2250
  (5)500
A square loop of side 2 cm enters a magnetic field with a constant speed of 2 cm s-1 as shown. The front edge enters the field at t = 0s. Which of the following graph correctly depicts the induced emf in the loop?
( Take clockwise direction positive )
square loop of side 2 cm
A stretched wire of a material whose Young's modulus Y = 2 × 1011 Nm-2 has Poisson's ratio of 0.25. Its lateral strain εl = 10-3. The elastic energy density of the wire is
A metallic rod of length 1 m held along east-west direction is allowed to fall down freely. Given horizontal component of earth’s magnetic field BH = 3 × 10-5 T. The emf induced in the rod at an instant t = 2s after it is released is ( Take g = 10 ms-2 )
Calculate the maximum acceleration of a moving car so that a body lying on the floor of the car remains stationary. The coefficient of static friction between the body and the floor is 0.15 (g=10ms-2).
The Jacobian matrix for transforming from (x, y) to another orthogonal coordinates system (u, v) as shown in the figure is
Graph x and y
The ratio of radius of gyration of a solid sphere of mass M and radius R about its own axis to the radius of gyration of the thin hollow sphere of same mass and radius about its axis is:
The equivalent resistance between the points A and B in the following circuit is
Electric circuit of Resistors