Curioustab

Home » Electronics and Communication Engineering » Materials and Components

Which of the following is used in automatic control of street lights?

Thermistor
Photoconductor
Transistor
Varistor

Correct Answer: Photoconductor

← Previous Question Next Question→

More Questions from Materials and Components

A leaky dielectric has ∈r = ∈r' - j∈r". If a field E is applied, the current component in phase with E is proportional to ∈r".
The colour code on a carbon resistor is yellow-violet-orange. The value of resistance is
An electron in a metal suffers collision and if the probability of it being scattered over an angle dθ is 2p P(θ) sin θ dθ where P(θ) is an arbitrary function of scattering angle θ, then
The relation between thermal conductivity K (W/m/°C), heat flow density Q (watt/m2) and dT/dx (°C per metre) is
Assertion (A): Ionic solids, in general, have no electrical conductivity. Reason (R): In ionic solids, electrons are tightly bound to the nucleus.
In which of the following semiconductor are holes minority carriers
The number of valence electrons in silicon atom is
When temperature is above ferromagnetic Curie temperature, a ferromagnetic material
The number of turns in a coil is doubled. If initial time constant is T, the new time constant is
∈r is determined by the atomic structure of the dielectric.

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion