MCQ
The solids which have the negative temperature coefficient of resistance are :
- ✓Insulators and semiconductors
- Bmetals
- Cinsulators only
- Dsemiconductors only
✓
Answer
Correct option: A.
Insulators and semiconductors
a
The negative temperature coefficient of the resistance is only present in the insulators or the semiconductors. In these, the resistance decreases with increase in temperature.
The negative temperature coefficient of the resistance is only present in the insulators or the semiconductors. In these, the resistance decreases with increase in temperature.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The momentum of photon is :
If Fresnel’s biprism experiment as held in water inspite of air, then what will be the effect on fringe width
A polarizer - analyser set is adjusted such that the intensity of light coming out of the analyser is just $10 \%$ of the original intensity. Assuming that the polarizer - analyser set does not absorb any light, the angle by which the analyser need to be rotated further to reduce the output intensity to be zero, is.....$^o$
→In a concave mirror experiment, an object is placed at a distance $X_1$ from the focus and the image is formed at a distance $X_2$ from the focus. The focal length of the mirror would be
→A concave lens and a convex lens have same focal length of $20 cm$ and both put in contact this combination is used to view an object $5 cm$ long kept at $20 cm$ from the lens combination. As compared to object the image will be
→The de-Broglie wavelength of an electron in the first Bohr orbit is
When a battery is connected across a series combination of self inductance L and resistance R, the variation in the current i with time t is best represented by
Figure $(a)$ shows two capacitors connected in series and joined to a battery. The graph in figure $(b)$ shows the variation in potential as one moves from left to right on the branch containing the capacitors, if
→
A potentiometer wire is $100\,\, cm$ long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at $50\,\, cm$ and $10\,\, cm$ from the positive end of the wire in the two cases. The ratio of emf's is
→A capacitor is charged by a battery. The battery is removed, and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system.