(iv) Period in which all factors of production are variable.​

Explanation:

Time base circuit

A time base generator (also timebase or time base) is a special type of function generator, an electronic circuit that generates a varying voltage to produce a particular waveform.

trigger circuit

An oscilloscope's trigger function is important to achieve clear signal characterization, as it synchronizes the horizontal sweep of the oscilloscope to the proper point of the signal. The trigger control enables users to stabilize repetitive waveforms as well as capture single-shot waveforms.

Aquadag coating

The aquadag coating has two functions: it maintains a uniform electric field inside the tube near the screen, so the electron beam remains collimated and is not distorted by external fields, and it collects the electrons after they have hit the screen, serving as the return path for the cathode current.

indifferent

unexperience

anti-bacterial

unnatural

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The antonyms are as follows:

i) indifferent

ii) inexperience

iii) antibacterial

iv) unnatural

• Antonyms can also be known as opposite words. They refer to the words having opposite and contradictory meanings.

• Prefix refers to an adage placed at the beginning of a word to create a new word.

• The prefixes used in this exercise to create the antonyms are '-in,' '-anti,' and '-un.'

i have the answer but i am not able to show it!!

Answer:

physician is able to tell about a patient's wellness

Physicians are able to tell about a patient's wellness.

1. In any particular sentence, we utilize the words "able to" to reveal someone's ability. "Able" refers to the adjective meaning: having the guts or ability or skill or perform something. If we say "I am able to dance", it is like saying "I can dance". We often utilize the words able to instead of "can" or "could" for some ability.

2. Able to is generally used when you tend to express that somebody or something initiated (and concluded) a role in the past.

3. Examples-

# I am able to hear now.

# I am able to take the conference call now.