Recent questions tagged device

Description : Spring.

Last Answer : what is now?

Description : State any four materials used in fabrication of semiconductor device and describe its need.

Last Answer : For fabrication of semiconductor devices like transistors diode, solar cell etc. we have to make use of following types of materials  1. Substrate: o It is used for deposition of thin ... . o Metal cans and sealed glass containers satisfy the extreme requirements of space and military users.

Description : Linear and non-linear device

Last Answer : Linear and non-linear device

Description : Why transistor is called as bipolar device.

Last Answer : BJT is called bipolar device because in BJT current conduction takes place due to majority as well as minority charge carriers that is because of electrons as well as holes.

Description : Which of the following device is used for coupling microwave energy?  A) Resonator B) Waveguide C) Loop D) Antenna

Last Answer : A

Description :  Which of the following is a negative-resistance microwave device for oscillator applications? A) IMPATT Diode B) Gunn Diode C) Snap diode D) Schottky Diode 

Last Answer :  Which of the following is a negative-resistance microwave device for oscillator applications? A) IMPATT Diode B) Gunn Diode C) Snap diode D) Schottky Diode 

Description : The device which allows reverse power flow and withstands highest switch frequency is (A) GTO (B) MOSFET (C) IGBT (D) Inverter grade SCR

Last Answer : The device which allows reverse power flow and withstands highest switch frequency is MOSFET

Description : A snubber circuit is connected to the power semiconductor device to reduce the (A) turn-on time (B) turn-off time (C) electrical stresses (D) thermal resistance

Last Answer : A snubber circuit is connected to the power semiconductor device to reduce the electrical stresses

Last Answer : Wagner earthing device is used to eliminate errors due to electrostatic coupling.

Last Answer : Basically a potentiometer is a device for comparing two voltages.

Last Answer : A damping device prevents the oscillation of the moving system and enables the latter to reach its final position quickly.

Last Answer : A switchgear is device used for switching, controlling and protecting the electrical circuit and equipment.

Description : Is FPGA a volatile device?

Last Answer : Yes, FPGA is a volatile device.

Last Answer : MOSFET  are voltage controlled devices.

Last Answer : BJT is current controlled device.

Last Answer : No, IGBT is not the current controlled device. IGBT is a voltage controlled device. IGBT have combine qualities of MOSFET and BJT. The high switching speed of MOSFET and low conduction losses of BJT. Also, IGBT which stands for Insulated Gate Bipolar Transistor have high input impedance.

Last Answer : Thyristor can only be turned on by small gate pulse but it cannot be turn off by using gate hence thyristor is called semi controlled device.

Last Answer : Thyristor can be turn on by positive gate pulse and the current will continue to flow through the device even when the gate voltage is low hence thyristor is called latching device.

Last Answer : No, BJT is a current controlled device .

Last Answer : already answered here is mosfet current controlled device?

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