A voltmeter of resistance 20,000 ohm reads 5 volts. Find the extra resistance required to make it read 20 volts?
Answers
Answered by
15
R=20000ohm
Potential difference (V)=5V
I(current)=?
Using ohm's law
V=IR
5=20000I
I=5/20000C
now if V=20V
I will be constant i.e. 5/20000C
using V=IR
20=5R/20000
R=400000/5 i.e 80000ohm
Potential difference (V)=5V
I(current)=?
Using ohm's law
V=IR
5=20000I
I=5/20000C
now if V=20V
I will be constant i.e. 5/20000C
using V=IR
20=5R/20000
R=400000/5 i.e 80000ohm
khakhlary:
bro may be answer is 60,000 ohm
Check it out
if you get the correct process and send it to me then i will mark as brainliest
bro this is the right answer
or please check if you had cooied wrong something by mistake
sorry bro actually v will be 15V
20-15v
20-5v
so after multiply we get 60000
now please mark my answer brainliest bro
Answered by
3
R=20000ohm
Potential difference (V)=5V
I(current)=?
Using ohm's law
V=IR
5=20000I
I=5/20000C
now if V=20V
I will be constant i.e. 5/20000C
using V=IR
20=5R/20000
R=400000/5 i.e 80000ohm
Similar questions