Electrical Engineering - Quantities and Units - Discussion

Discussion Forum : Quantities and Units - General Questions (Q.No. 5)
5.
The number of kilowatts in 135 milliwatts is
1.35 × 10–4 kW
135 × 10–3 kW
0.0135 kW
0.00135 kW
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
46 comments Page 3 of 5.

Samuel timothy said:   1 decade ago
Am very impressed wit this workings, and it improved me.

Tandel hiren said:   1 decade ago
1000 mw = 1 w.
135 mw = 0.135 w.

So 1000 w = 1 kw.
0.135 w = 1.35*10-4.

Mohan said:   1 decade ago
Consider that we have 1 milliwatt.

Now,

=> 1 milliW = 1*10^-6 KW.
=> 135 milliW = x KW.
=> (cross multiplying above).

x = 135*10^-6 KW.

x = 1.35*10^-4 KW (shifting upto 2 decimal points).

Ubhale said:   1 decade ago
Given: 135milliwatt.

=> 135x10^-3 : To convert it into kilowatts, lets multiply and divide it by 10^3.

=> 135x10^-3 x 1/10^3 KW.

=> 135x10^-6 KW (cause when denominator goes to numerator, '+' becomes "-" so).

=> 135x10^-6 KW => 13.5x10^-5 KW => 1.35x10^-4 KW.

Hence the answer is 1.35x10^-4 KW.

Shadiq said:   1 decade ago
Sorry friends still I can't understand. Please explain me clearly.

Prince Janesh Unique said:   1 decade ago
First understand the logic principles ------>

0 --------> Milliwatts.
10 --------> Watts.
1000 -------> K.watts.

Conversions ------------------------->

135 milliwatts = 13.5 watts (135/10=13.5).
Now 1 K.W = 1000 watts.
1. watts = 0.001 kW.

135 m.W = 13.5 Watts = 13.5*0.001 kW.
= 1.35*0.00001kW.
= 1.35*10^-4.

Aman.samyal said:   1 decade ago
1mW = 0.001W.
1W = 0.001KW.
Therefore, 1mW = .000001 kW.

Hence 135mW = 135*.000001 kW.
=1.35*10^-4 kW answer.

Suresh said:   1 decade ago
135*10^-3w.
To convert to KW.
Divide and multiply by 10^3 to reduce the unit to W.

Again to reduce the unit to KW divide by 10^3.

Vigneshb said:   1 decade ago
1.35 *10^-4 kW.

1.35 *10^-4 *10^3W.

1.35 *10^-1W.

So 135 mW.

Indrajeet said:   1 decade ago
We know,

135mW = 135/1000w = .135w = . 35/1000 kw.

Which is equal to option (A).


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