TS EAMCET · Physics · Semiconductors
Which of the following statements is true?
- A A solid is an insulator or semiconductor, if its conduction band is partially filled
- B A solid is necessarily an insulator, if its conduction band is empty
- C A solid is necessarily a semiconductor, if its conduction band is empty
- D A solid is a conductor, if its conduction band is partially filled
Answer & Solution
Correct Answer
(D) A solid is a conductor, if its conduction band is partially filled
Step-by-step Solution
Detailed explanation
For an insulator, conduction band must be empty. For a semiconductor, conduction band is partially filled. For a conductor, conductive band is partially filled. (Note: option 2, is also correct).
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- The base current in a transistor circuit changes from \(45 \mu \mathrm{A}\) to \(140 \mu \mathrm{A}\). Accordingly, the collector current changes from \(0.2 \mathrm{~mA}\) to \(0.400 \mathrm{~mA}\). The gain in current isTS EAMCET 2013 Easy
- A rod of length \(L\) revolves in a horizontal plane about the axis passing through its centre and perpendicular to its length. The angular velocity of the \(\operatorname{rod}\) is \(\omega\). If \(A\) is the area of cross-section of the rod and \(\rho\) is its density, then the rotational kinetic energy of the rod isTS EAMCET 2020 Medium
- With a standard rectangular bar magnet of length (l), breadth \((b ; b< < l)\) and magnetic moment \(M\), the time period of the magnet in a vibration magnetometer is \(4 \mathrm{~s}\). If the magnet is cut normal to its length into four equal pieces, the time period (in seconds) with one of the pieces isTS EAMCET 2005 Medium
- The position of a particle at time \(t\) is given by the equation \(x(t)=\frac{v_0}{A}\left(1-e^{A t}\right) v_o=\) constant and \(A>0\). Dimensions of \(v_o\) and A respectively areTS EAMCET 2004 Easy
- \(\mathrm{N}\) molecules each of mass \(\mathrm{m}\) of gas \(\mathrm{A}\) and \(2 \mathrm{~N}\) molecules each of mass \(2 \mathrm{~m}\) of gas \(\mathrm{B}\) are contained in a vessel which is maintained at temperature \(T\). The mean square velocity of the molecules of gas B is denoted by \(V_2^2\) and the mean square of the \(\mathrm{X}\)-component velocity of the molecules of gas \(A\) is denoted by \(V_1^2\), then \(\frac{V_1}{V_2}\) isTS EAMCET 2023 Medium
- A big liquid drop splits into ' \(n\) ' similar small drops under isothermal conditions, then in this processTS EAMCET 2024 Medium
More PYQs from TS EAMCET
- Match the following fundamental forces of nature with their relative strength.

The correct match is
TS EAMCET 2019 Easy - In the given circuit, a charge of \(+80 \mu \mathrm{C}\) is given to upper plate of a \(4 \mu \mathrm{F}\) capacitor. At steady state, the charge on the upper plate of the \(3 \mu \mathrm{F}\) capacitor is
TS EAMCET 2017 Medium - Two concentric hollow spherical shells have radii \(r\) and \(R(R \gg r)\). A charge \(Q\) is distributed on them such that the surface charge densities are equal. The electric potential at the centre isTS EAMCET 2014 Medium
- The half-life of a radiocative isotope is \(30 \mathrm{~h}\). How long will it take to get reduced to \(12.5 \%\) of its initial amount?TS EAMCET 2020 Easy
- Two particles having position vectors \(\mathbf{r}_1=(3 \hat{\mathbf{i}}+5 \hat{\mathbf{j}})\) metres and \(\mathbf{r}_2=(-5 \hat{\mathbf{i}}-3 \hat{\mathbf{j}})\) metres are moving with velocities \(\mathbf{v}_1=(4 \hat{\mathbf{i}}+3 \hat{\mathbf{j}}) \mathrm{m} / \mathrm{s}\) and \(\mathbf{v}_2=(a \hat{\mathbf{i}}+7 \hat{\mathbf{j}}) \mathrm{m} / \mathrm{s}\). If they collide after \(2 \mathrm{~s}\), then the value of \(a\) is :TS EAMCET 2003 Medium
- Rain is falling at an angle of \(30^{\circ}\) from the vertical due to the wind with a speed of \(40 \mathrm{~m} / \mathrm{s}\). A car is travelling horizontally in the direction opposite to the wind, at a speed of \(40 \mathrm{~m} / \mathrm{s}\). At what angle from the vertical will it experience the rain falling from?
TS EAMCET 2019 Easy