Electrical Engineering - Ohm's Law - Discussion

Discussion :: Ohm's Law - General Questions (Q.No.6)

6. 

How much resistance is required to limit the current from a 12 V battery to 3.6 mA?

[A]. 3.3 k
[B]. 33 k
[C]. 2.2 k
[D]. 22 k

Answer: Option A

Explanation:

No answer description available for this question.

Projit Saha said: (Jan 20, 2011)  
ACCORDING TO OHM'S LAW,
R(resistance)=V(voltage)/I(current)
=12/3.6
=3.33 kilo-ohm

Vinay said: (Feb 23, 2011)  
Ohm's Law :- V = I*R

But here we adjust the terms as,
R = V/I
= 12/3.6 * 10^-3 ...(^ sign is POWER )
= (12/3.6)* 10^3 ...(shifting of 10^-3)
= 3.3 * 10^3
R = 3.3 kilo-ohm

Mani said: (Mar 13, 2011)  
I want range of mA and killo-ohm. Any one say?

Surekha said: (Jul 10, 2011)  
mA=10^-3
kilo ohm =10^3

Sakthi said: (Jul 12, 2011)  
V=I/R
V=12/3.6
V=3.3KM

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

Suraj said: (Sep 20, 2011)  
Absolutely its 3.33kilo ohms.

Tapaswini Swain said: (Oct 15, 2011)  
I=V/R
V=12V
I=3.6mA=3.6*10^-3
R=V/I
R=(12/36*10^-4)Ohm
=(1/3)*10^4ohm
=0.333*10^4ohm
=3.33*10^3ohm
=3.33kilo-ohm

Vikas Kumar said: (Jul 19, 2012)  
V=12, I = 3.6mA=0.0036A.

V=IR.

R=V/I=12/0.0036=12*10^4/36=10^4/3=10000/3=3333.33 ohm.

3.3 kilo ohm.

Sunny said: (Aug 27, 2012)  
V=12
I=3.6mA
R=12/3.6*10^-3=12/0.036=3.3kohms.

J.Venkatesh said: (Oct 14, 2012)  
According to ohms law,
V=IR
V=12v
I=3.6ma
R=V/I
I=0.0036AMPS.
R=12/0.036
FINALLY R=3300 OHMS.
R=3.3KOHMS.

Pramod Shinva said: (Aug 4, 2013)  
Over formula is suitable for only in Ohms Volts Amps. So we should be convert mA to Amps.(3.6MA = 3600A).

R = V/I.

= 12/3600.

= 0.0033ohms (0.0033ohms = 3.33 kohms).

= 3.3 kohms.

Jayadhar said: (Sep 22, 2013)  
Assuming Temperature is constant, By OHM'S law,

V = RI.

hence; R= V/I.

R = 12/36000.

R = 3333.3333 ohms.

Shahadat said: (Oct 3, 2013)  
@Jayadhar you are right,

Because of Temperature is constant And
According to OHM's law,

V = RI.

R = 3.3 k ohm's.

Avatar said: (Oct 8, 2014)  
R = V/I.

SO, R = 12/3.6 = 3.333333333333333.

Ravi said: (Aug 22, 2015)  
According to ohms law.

V = IxR.
R= V/I.

So data given.

V = 12V.
I = 3.6 mA.

R = V/I.

= 12/(3.6*10^-3).

= 12*10^3/3.6. (Here denominator 10^-3 shifted to numerator i.e 10^3).

= 12000/3.6.

= 3.3 kilo ohms.

Appaso said: (Nov 10, 2015)  
All comments which are given above is totally wrong because ohms law given by them is totally wrong. i is directly proportional to v.

Imrosekhan said: (Nov 16, 2016)  
As we know that v = ir.
According to ohm's law.
So, R = V/I.

Substitute those values in the above equation.
we get, 12/10powerten(-3) = 3.3kiloohms.

Prema said: (Mar 9, 2017)  
Can anyone let me know the conversation of (-3) to (+3)?

Makhado said: (Jul 22, 2019)  
Thank you all for explaining.

Post your comments here:

Name *:

Email   : (optional)

» Your comments will be displayed only after manual approval.