Answer:
It is the SQL of WWW. Or in other words, it is the web tool that helps the users in locating the required information on the WWW. Various top search engines are like Google, MSN, and Yahoo. And the information that is gathered by the spider is used for creating the searchable index for the content on the web. This spider crawls according to the search engine algorithm and that is known as web crawling.
Explanation:
Please check the answer section.
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It would be a audio file -B.
Answer:
4000k-ohm to 10,000k-ohm
Explanation:
As we know that time constant for an RC circuit is t=RC
Putting the values of t we can get the range of varaiable resistor as;
t=RC
Putting t=2 we get the first value of the range for the variable resistor
2=R*0.500*10^-6
R=2/(0.500*10^-6)
R=4*10^6
R=4000k-ohm
Now putting t=5 we get the final value for the range of variable resistor
t=RC
5=R*0.500*10^-6
R=5/(0.500*10^-6)
R=10*10^6
R=10,000k-ohm
So variable resistance must be made to vary in the range from 4000k-ohm to 10,000k-ohm
