Question

A solid reflects incident light and it’s electrical conductivity decreases with temperature. The binding in this solids

(a) Ionic  

(b) Covalent

(c) Metallic

(d) Molecular

Answer

(c) Metallic

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

An inductance of 0.2 H and a resistance of $100\Omega$ are connected in series to an A.C. 180 V, 50 Hz supply. The apparent current flowing in the circuit will be.
Which of the following does not fit into a group:
A circular plate of diameter d is kept in contact with a square plate of edge d as show in figure. The density of the material and the thickness are same everywhere. The centre of mass of the composite system will be:
  1. Inside the circular plate.
  2. Inside the square plate.
  3. At the point of contact.
  4. Outside the system.
Inductive reactance of a coil is expressed in.
If a copper rod carries a direct current, the magnetic field associated with the current will be:
Which of the following waves are not electromagnetic?

A charged particle is suspended in equilibrium in a uniform vertical electric field of intensity 20000 V/m. If mass of the particle is 9.6  , the charge on it and excess number of electrons on the particle are respectively  (g =

(a) 4.8  

(b) 5.8  

(c) 3.8  

(d) 2.8  

an isotope of thorium decays in ten stages emitting six a-particles and four b-particles in all. The end product of the decay is

(a)  

(b)  

(c)  

(d)

The ratio of thermionic currents (I/I0) for a metal when the temperature is slowly increased  to T as shown in figure. (I and I0 are currents at T and respectively). Then which one is correct?

(a) A

(b) B

(c) C

(d) D

If the ammeter in the given circuit reads 2 A, the resistance R is

(a) 1 ohm

(b) 2 ohm

(c) 3 ohm                                          

(d) 4 ohm