# What is the unit used to measure electric resistance

What is the unit used to measure electric resistance

## This Post Has 6 Comments

1. bks53 says:

T = 0.017s

Explanation:

period is the time it takes a particle to make one oscillation

An electric current is periodic in nature

The current reaches 3.8A  ten times.

So there must have been 10 cycles (10 periods) in 0.17s.   let 'T'  be the period:

$T=\frac{t}{n}$

t is the total time interval

n is the number of oscillations

$T=\frac{0.17}{10}$

10T = 0.17

T = 0.17/10 = 0.017s

2. alemorachis49 says:

The siemens (symbol: S) is the SI derived unit of electric conductance and admittance, also known as the mho (ohm spelled backwards, symbol is ℧); it is the reciprocal of resistance in ohms (Ω).

3. iwantcandy2002 says:

The period T with which the current at the wall socket changes is 0.017 s.

It also ranges from 0.155 s to 0.0189 s since the cycles is not given in the question.

Explanation:

The current reaches 3.8 A once for every cycle. So there must have been 10 cycles (10 periods) in 0.17 s.

Using 'T' for period:

10 T = 0.17

T = 0.17 / 10

T  = 0.017 s.

The question doesn't tell about the cycles and so we assume it as 10 cycles. If there are 9 cycles due to the current 3.8 A at the exact beginning and end of 0.17 s. This would make the period T as

0.17 / 9 = 0.0189 s approx.

Likewise, if the 3.8 A occurs at the end of the 1st cycle, 11 cycles would have passed during 0.17 s.

In that case the period = 0.17 / 11 = 0.155 s approx.

So T could be in the range from 0.155 s to 0.0189 s.

4. tiffanyliu1 says: