Electrical Engineering - Ohm's Law - Discussion

Discussion :: Ohm's Law - General Questions (Q.No.8)

8. 

What is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source?

[A]. 9.7
[B]. 97
[C]. 23
[D]. 230

Answer: Option D

Explanation:

No answer description available for this question.

Parminder Singh said: (Feb 28, 2011)  
I=V/R
I=650ma
V=150
R=?
650ma=150/R
650a/1000=150/R
65a/100=150/R
R*65a/100=150
R=150*100/65
R=15000/65
R=230

Anand said: (Jul 22, 2011)  
Nice answer parminder

Murugaperumal said: (Jul 25, 2011)  
V=IR
SO,R=150/650*10^-3,
R=150/.65,
R=230 OHMS.

Prashant said: (Jul 28, 2011)  
I=650mA,
I=650*10^3A,
V=150V,
R=V/I;
R=150/(650*10^3);
R=230 ohm

Shyam Patiala said: (Mar 13, 2012)  
V=150V
I=650mA I=650/1000A
R=?

V=IR
R=V/I

R=150*1000/650
R=150000/650
R=15000/65
R=230ohm

Ramkumar said: (Mar 27, 2012)  
v=150v
i=650ma=650*10^-3

v=ir
r=v/i
=150/650810^-3
=230ohm

Suresh Kumar Rangaraj said: (Sep 1, 2014)  
v = 150v.
i = 650*10^-3.
r = v/i.

r = 150/(650*10^-3) .
r = 230.

Manoj said: (Feb 7, 2015)  
v = 150v.
i = 150/650/1000 = 0.65.
150*0.65 = 230 v.

Khenz Santos said: (Jul 3, 2015)  
V = IR.
R = V/I.
I = 650 mA.
V = 150 V.

So, R = 150/(650*10^-3).

R = 230 ohms.

Nihal P Navas said: (Sep 6, 2015)  
V = IR.
R = V/I.

Given I = 650 mA = (650 x 10^3) = 0.65 A.

V = 150 V.

Therefore R = 150/0.65 = 230.77~~ 230 ohms.

Pork said: (Feb 10, 2016)  
Where did you get that 1000?

Pork said: (Feb 10, 2016)  
Where did you get that 1000?

Veenashri said: (Apr 2, 2016)  
V = 150.
I = 650.

=> V/I = 150/650 = 0.230777.

=> R = 0.23077/1000.

=> 230 OHM.

Sunil said: (Sep 23, 2016)  
V =150, I = 650 mA, R = ?,

I = 650 mA = 650/1000 = 0.65,

R = V/I = 150/0.65 = 230 Ω.

Sarabjit Singh said: (May 13, 2017)  
Very nice explanations. Thank you all.

Prasanth said: (Oct 22, 2018)  
150v.
650ma.
R=?.

R = v/I.
=150/(0.65),
I= 650/1000 = 0.65,
150/0.65 = 230.

Anil said: (Jan 9, 2019)  
How come 1000 here?

Subhash said: (Jan 17, 2019)  
650*(10^-3) = 650 * (1/10^3).
So =650/1000.

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