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Electronics and Communication Engineering - Electronic Devices and Circuits

Exercise : Electronic Devices and Circuits - Section 5
21.

Assertion (A): Double Kelvin's bridge is used to measure low resistances.

Reason (R): In low resistance, the contact and lead resistances are very important.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true R is false
A is false R is true
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
Shaft encoder is used to measure
angular position
linear position
linear velocity
linear acceleration
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.

Assertion (A): Hay's bridge in particularly suitable for measuring inductance having a comparatively low resistance.

Reason (R): In Hay's bridge the value of frequency supply must be known.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true R is false
A is false R is true
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
The device having highest photo sensitivity is
photoconductive cell
photovoltaic cell
photodiode
phototransistor
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Which of the following closely represents the resistance-temperature characteristics of thermistor?
RT = a R0 eb/t
RT = a R0 E-b/t
RT = - a R0 e-b/t
RT = - R0 eb/t
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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