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What else can I help you with?
True or false a high resistance between the collector and emitter when a transistor is switched off?
yes , it has high resistance between collector and emitter on the off state.
Why cut off frequency is called half power frequency?
Cut off frequency is that frequency at which the power output of the circuit reduces to half of its power in pass band. Power (P)= Current2 X Resistance. so to reduce the power by half we need to reduce the current by 1/sqrt{2} = 0.707 = 3 db. So it's also called half power frequency. http://enter4joy.com
Frequency response of bjt amplifier?
All amplifier typically exhibit a band-pass frequency response. The cut off frequency in the low end is usually determined by the coupling band bypass capacitor .and the high frequency limit is typically determined by internal capacitances in the transistor itself.
What will happen if emitter base is reversed bias and collector base is forward bias?
If emitter-base is reverse biased then there will be no amplification effect on collector-emitter. If collector-base is forward biased, it will act like a diode, but without emitter-base current, that is meaningless.
Why ujt called current controlled negative resistance device?
The On/OFF action in UJT is controlled by emitter current
The value of r when a transistor is biased to cut off is -?
Collector-to-Emitter resistance is high when the transistor is biased off.
How common emitter acts as a switch?
In response to the control signal on the base, the transistor switches on or off, effectively shorting the collector to the grounded emitter or opening leaving the collector floating.
How many states does a transistor have?
A transistor can be in three conditions or states. It can be active (at a voltage higher than the emitter), in saturation or cut off (no current).
Why the te0 mode is the dominant mode in rectangular waveguide?
Because it has the lowest cut-off frequency (highest cut off wavelength) for a>b o
Why emitter follower is called so?
Because of the geometry of the common collector configuration, changes in base voltage appear at the emitter. Said another way, what happens at the base pretty much happens at the emitter, and the emitter can be said to "mirror" or "follow" the base. The emitter is a follower of the base, and the name emitter follower appeared and was used.
True or false a high resistance between the collector and emitter when a transistor is switched off?
yes , it has high resistance between collector and emitter on the off state.
Why cut off frequency is called half power frequency?
Cut off frequency is that frequency at which the power output of the circuit reduces to half of its power in pass band. Power (P)= Current2 X Resistance. so to reduce the power by half we need to reduce the current by 1/sqrt{2} = 0.707 = 3 db. So it's also called half power frequency. http://enter4joy.com
What is meant by beta cutoff frequency?
The beta cut off frequency is the frequency at which the current amplification of an amplifier transistor drops to three decibels below its value at 1 kilohertz. This is used in electronic engineering.
How did mudussa die?
The common answer is that Perseus cut off her head.
Can a waveguide have more than one cut off frequency?
yes it can have coz fc= c/2[(m/a)2+(n/b)2]1/2 therefore for various modes(which decide m,n) nd dimensions(a,b) of waveguide it will have different cut off frequency. A normal waveguide is used in the octave frequency range where only the fundamental mode can propagate.
What causes the gain of OP AMP to roll off after a certain frequency is reached?
A: Any amplifier will reach a frequency cut off point because of hindered circuit capability however the roll of bust be controlled especially when reaching oDB point must be at a -3 db roll off to prevent hi frequency oscillation
Is a high pass filter and a low pass filter the same thing?
Yes, they are both filters. But their frequency characteristics are different. This is the main reason why they are given different names. A high-pass filter passes frequencies higher than its cut-off frequency, and stops those that are lower. A low-pass filter passes frequencies lower than its cut-off frequency, and stops those that are higher.
