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nika2105 [10]
3 years ago
14

Which type of experiment involves changing only one variable at a time

Physics
2 answers:
BlackZzzverrR [31]3 years ago
6 0
Controlled Experiment 

muminat3 years ago
3 0

Answer:

Controlled experiment

Explanation:

the correct answer is Controlled experiment

To test certain variable scientist sometimes manipulate the experiment by allowing change of only one variable at one time this experiment is known as a controlled experiment.  

A controlled experiment is done in an experiment to get to see the effect on the specimen by changing the variables.

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two resistors of resistance 6 ohm and 3 ohm are connected in series and then in parallel .calculate the equivalent series resist
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Explanation:

Given that,

Two resistors of resistance 6 ohm and 3 ohm are connected in series and then in parallel.

For series combination,

R_{eq}=R_1+R_2

For parallel combination,

\dfrac{1}{R_{eq}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}

When 6 ohm and 3 ohm are in series,

R_s=6+3\\\\R_s=9\ \Omega

When 6 ohm and 3 ohm are in paralle,

\dfrac{1}{R_p}=\dfrac{1}{6}+\dfrac{1}{3}\\\\R_p=2\ \Omega

So, the equivalent resistance in series combination is 9 ohms and in parallel combination it is 2 ohms.

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