When a pure semiconductor is heated, its resistance_________
Answer: When a pure semiconductor is heated, its resistance decreases. When the temperature is raised, some covalent bonds in the... View Article
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The most commonly used semiconductor is
Semiconductors are the materials which have a conductivity between conductors (generally metals) and non-conductors or insulators (such ceramics). Most commonly... View Article
Oscillating circuits produce
circuits produce Radio frequencies.
An electric bulb is rated 220 V and 100 W. Power consumed by it operated on 110 V is
Resistance of the bulb And Power consumed at 110 is =
Which equation represents Kirchhoff’s Second Law?
According to the Kirchhoff’s second law; in any closed path of an electrical circuit (or closed loop) the algebraic sum... View Article
Why does current flow in the forward-bias direction but not flow in the reverse-bias direction in a pn junction?
In the forward-bias direction, an electric current will flow due to the majority carriers’ migration across the p-n junction called... View Article
The name of a diode that can be used to provide a variable capacitance is:
Varactor diode provides a variable capacitance.It is also known as tuning diode, variable capacitance diode, varicap diode or variable reactance diode. Varactor... View Article
A semiconductor is formed by _______
A semiconductor is formed by Covalent bonds. Semiconductors, such as silicon, are made up of individual atoms bonded together in... View Article
Electrons moving like molecules of a gas exist in:
Electrons in metal behave as gas.
The energy of the em waves is of the order of 15 keV. To which part of the spectrum does it belong?
wavelength = hc / E
Meter Bridge or Slide Wire Bridge is a practical form of
Meter Bridge or Slide Wire Bridge is a practical form of Wheatstone bridge.
Which region in the electromagnetic spectrum will have the highest speed?
All the regions in the electromagnetic spectrum have the same speed. The speed depends on the material in which the... View Article
Under what condition, the current drawn from the cell is maximum?
The maximum current can be drawn from a cell if the external resistance R = 0. Current flowing through a... View Article
Wavelength of Microwaves
Microwaves have a wavelength in the range of _____. Answer: 1mm to 1m Explanation: Microwaves have a wavelength in the... View Article
Sensitivity of potentiometer can be increased by_______
Answer: The sensitivity of the potentiometer can be increased by decreasing the potential gradient. Potentiometer A potentiometer is defined as an... View Article
Production of electro-magnetic wave is demonstrated by:
Production of electro-magnetic wave is demonstrated by Hertz experiment.
The physical properties of electromagnetic waves are decided by their
The physical properties of electromagnetic waves are decided by their wavelength.
Copper is not used as potentiometer wire because
Copper has low resistivity and a high temperature coefficient of resistance and hence we do not use it in potentiometer.
Fractures are detected using
Fractures are detected using X – Rays. Explanation The bone is a major component of the human body. Bone provides... View Article
The Wheatstone bridge and its balance condition provides a practical method for the determination of
The wheat stone bridge and its balance condition provides a practical method for determination of unknown resistance.
