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N.k.Rathod wireman instructor ITI darwha dist.Yavatmal-445202 Alternating current- MCQ-3

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1) A 40 ohm resistor is connected across a 15v variable frequency source.The current through the resistor when frequency is 100 Hz will be.

2 points

A) 0.5 A

B) 0.1A

C) 0.375A

D) cannot be found

Clear selection

2) The frequency of the waveform shown in fig.

2 points

A) 10 kHz

B) 5 kHz

C) 2 kHz

D) 2.5 kHz

Clear selection

3) Radio frequency choke is

2 points

A) air cored

B) iron cored

C) air as well as iron cored

D) none of above

Clear selection

4) The reactance of 1F capacitance when connected to a d.c.ciruit is.

2 points

A) infinite

B) zero

C) 1 ohm

D) 0.5 ohm

Clear selection

5) The mains supply of a house is 230 v,50Hz .The potential difference experience by a person who happens to touch the line is

2 points

A) 230v

B) 460v

C) 325v

D) 115v

Clear selection

6) An air core choke coil and an electric bulb are connected in series with a.c.mains .On introducing soft iron bar in the coil, the intensity of light will.

2 points

A) fluctuate

B) remain unchanged

C) increase

D) decrease

Other:

Clear selection

6) An air core choke coil and an electric bulb are connected in series with a.c.mains .On introducing soft iron bar in the coil, the intensity of light will.

2 points

A) fluctuate

B) remain unchanged

C) increase

D) decrease

Other:

Clear selection

6) An air core choke coil and an electric bulb are connected in series with a.c.mains .On introducing soft iron bar in the coil, the intensity of light will.

2 points

A) fluctuate

B) remain unchanged

C) increase

D) decrease

Other:

Clear selection

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