Doubling the operating frequency of a capacitive circuit:

Doubling the operating frequency of a purely capacitive circuit:

A

has no effect on the total circuit current

B

doubles the amount of total current

C

cuts the total current by one-half

D

thrice the amount of total current

E

None of the above

Doubling the operating voltage of a purely capacitive circuit:

A

has no effect on the capacitive reactance

B

doubles the amount of capacitive reactance

C

multiplies the capacitive reactance by 7

D

cuts the capacitive reactance in half

E

None of the above

Doubling the operating frequency of an inductive circuit:

A

has no effect on the inductive reactance

B

doubles the amount of inductive reactance

C

multiplies the inductive reactance by 6.28

D

cuts the inductive reactance in half

E

None of the above

Doubling the operating frequency of a purely inductive circuit:

A

doubles the amount of current through the inductors

B

has no effect on the current through the inductors

C

cuts the current through the inductors one-half

D

increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit

E

None of the above

Which of the following assertions are CORRECT? P: Adding 7 to each entry in a list adds 7 to the mean of the list Q: Adding 7 to each entry in a list adds 7 to the standard deviation of the list R: Doubling each entry in a list doubles the mean of the list S: Doubling each entry in a list leaves the standard deviation of the list unchanged

A

P. Q

B

Q. R

C

P. R

D

R. S

If the input power for a frequency doubler is 10.7 mW and the output measured after the frequency doubling process is 21 mW, then the conversion gain for the frequency doubler is:

A

4.5 dB

B

8.4 dB

C

9.8 dB

D

2.9 dB

In an AM system receiver. the mixer translates the carrier frequency fc to a fixed intermediate frequency of 450 kHz. Given a broadcast signal of frequency 900 kHz. What is the corresponding image frequency when a superhetrodyne receiver is employed with local oscillator frequency greater than the broadcast signal frequency?

A

900 kHz

B

1800 kHz

C

800 kHz

D

1350 kHz

In ac circuit, resistance 5 ohm is connected with capacitor having capacitive reactance 12 ohm. Supply of 260 V is connected to the circuit. Calculate the current in the circuit.

A

40 A

B

10 A

C

20 A

D

30 A

Statement (I): Capacitive proximity sensor can only be used for the detection of metal objects and is best with ferrous metals. Statement (II): One form of capacitive proximity sensor consists of a single capacitor plate probe with the other plate being formed by the object, which has to be metallic and earthed.

A

Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I).

B

Both Statement (I) and Statement (II) are individually true, but Statement (II) is not the correct explanation of Statement (I).

C

Statement (I) is true, but Statement (II) is false

D

Statement (I) is false, but Statement (II) is true.

The different age group people go for a morning walk. The age of 20 people who go for a morning walk is as follows: 19, 15, 34, 45, 69, 74, 24, 67, 77, 89, 91, 45, 65, 35, 56, 67, 55, 23, 78, 52 The Grouped frequency distribution table of above will be: (A) S. No Class Frequency 1 0-20 2 2 20-40 4 3 40-60 5 4 60-80 7 5 80-100 2 (B) S. No Class Frequency 1 0-20 3 2 20-40 3 3 40-60 5 4 60-80 6 5 80-100 3 (C) S. No Class Frequency 1 0-20 2 2 20-40 4 3 40-60 5 4 60-80 5 5 80-100 4 (D) S. No Class Frequency 1 0-20 2 2 20-40 7 3 40-60 2 4 60-80 7 5 80-100 2

A

(C)

B

(D)

C

(B)

D

(A)

Doubling the operating frequency of a capacitive circuit:

Related Questions