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Electronic Devices and Circuits
The sensitivity of human eyes is maximum at
White portion of spectrum
Violet portion of spectrum
Red portion of spectrum
Green portion of spectrum
White portion of spectrum
Violet portion of spectrum
Red portion of spectrum
Green portion of spectrum
Answer
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Electronic Devices and Circuits
Permalloy is
A nickel an iron alloy having high permeability
A conon-ferrous alloy used in aircraft industry
A polymer
A variety of stainless steel
A nickel an iron alloy having high permeability
A conon-ferrous alloy used in aircraft industry
A polymer
A variety of stainless steel
Answer
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Electronic Devices and Circuits
In a half wave rectifier, the load current flows
For less than fourth cycle
For full cycle
Only for the positive half cycle of the input signal
Only for the negative half cycle of the input signal
For less than fourth cycle
For full cycle
Only for the positive half cycle of the input signal
Only for the negative half cycle of the input signal
Answer
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Electronic Devices and Circuits
Hall effect is observed in a specimen when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is
In the direction of current
Antiparallel to magnetic field
Normal to both current and magnetic field
In arbitrary direction
In the direction of current
Antiparallel to magnetic field
Normal to both current and magnetic field
In arbitrary direction
Answer
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Electronic Devices and Circuits
In a semiconductor diode, the barrier offers opposition to
Holes in P-region only
Free electrons in N-region only
Majority carriers in both regions
Majority as well as minority carriers in both regions
Holes in P-region only
Free electrons in N-region only
Majority carriers in both regions
Majority as well as minority carriers in both regions
Answer
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Electronic Devices and Circuits
The output, V-I characteristics of an Enhancement type MOSFET has
Only a saturation region
Only an ohmic region
An ohmic region at large voltage values preceded by a saturation region at lower voltages
An ohmic region at low voltage value followed by a saturation region at higher voltages
Only a saturation region
Only an ohmic region
An ohmic region at large voltage values preceded by a saturation region at lower voltages
An ohmic region at low voltage value followed by a saturation region at higher voltages
Answer
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