Get Advice on Live Video Call
Earn $ Cash $ with
consultations on Bissoy App

Variation of electrical resistivity $$\rho $$ with temperature T of three solids is sketched (on different scales) in the figure, as curves P, Q and R.<br>Which one of the following statements describes the variations most appropriately?<br><img src="/images/question-image/engineering-physics/solid-state-physics/1689671280-variation-of-electrical-resistivity-rho-with-temperature.png" title="Solid State Physics mcq question image" alt="Solid State Physics mcq question image">

Correct Answer: Q is for a superconductor and P for a conductor

The dependences of the magnetic susceptibility $$\left( \chi \right)$$ of a material with temperature (T) can be represented by $$\chi \propto \frac{1}{{T - \theta }},$$   where θ is the Curie-Weiss temperature. The plot of magnetic susceptibility versus temperature is sketched in the figure, as curves P, Q and R with curve Q having θ = 0. Which one of the following statements is correct?
Solid State Physics mcq question image

The temperature dependence of the electrical conductivity σ of two intrinsic semiconductors A and B is shown in the figure. If EA and EB are the band gaps of A and B respectively, which one of the following is true?
Solid State Physics mcq question image

Two dielectric materials A and B exhibit both ionic and orientational polarizabilities. The variation of their susceptibilities $$\chi \left( { = {\varepsilon _r} - 1} \right)$$   with temperature T is shown in the figure, where $${\varepsilon _r}$$ is the relative dielectric constant. It can be inferred from the figure that
Solid State Physics mcq question image

Indifference curves relating to supply of labour have a number of properties some of which are mentioned below
1. Indifference curves are downward slopping
2. Indifference curves are upward slopping
3. Higher indifference curves indicate lower levels of utility
4. Higher indifference curves indicate higher levels of utility
5. Indifference curves do not intersect
6. Indifference curves intersect
7. Indifference curves are concave to the origin
8. Indifference curves are convex to the origin
Which among the following properties are not true?

In a diatomic molecule, the inter-nuclear separation of the ground and first excited electronic state are the same as shown in the figure. If the molecule is initially in the lowest vibrational state of the ground state, then the absorption spectrum will appear as
Atomic and Molecular Physics mcq question image

Towering cumulus (cumulus congestus) would refer to which of the clouds sketched below? Environmental Science mcq question image

In crystallographic notations, the vector $$\overrightarrow {{\bf{OP}}} $$  in the cubic cell shown in the figure is
Solid State Physics mcq question image

Five energy levels of a system including the ground state are shown below. Their lifetimes and the allowed electric dipole transitions are also marked.
Atomic and Molecular Physics mcq question image
Which one of the following transitions is the most suitable for a Continuous Wave (CW) laser?

The moment of inertia of a uniform sphere of radius, r about an axis passing through its centre is given by $$\frac{2}{5}\left( {\frac{{4\pi }}{3}{r^5}\rho } \right).$$    A rigid sphere of uniform mass density $$\rho $$ and radius R has two smaller spheres of radii $$\frac{R}{2}$$ hollowed out of it as shown in the figure given below.
Classical Mechanics mcq question image
The moment of inertia of the resulting body about Y-axis is

A piston containing an ideal gas is originally in the state X (see figure). The gas is taken through a thermal cycle X → Y → X as shown
Thermodynamics and Statistical Physics mcq question image
The work done by the gas is positive, if the direction of the thermal cycle is