In the fig above, XY is of length 1m, The value of R at balance point Z is

LeeMea

2 years ago

Figure X is missing,and it is to be located at the other end opposite Z and Y from the solution given. Then from the question XY=1m. Converting 1m to cm.
1m=100cm
therefore;ZY=100cm-60cm
=40cm.
then:R=60cm,20ohms=40cm
so therefore;R=30ohms.

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5 years ago

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ayodelegeorge06

2 months ago

hi

Hadassah88

1 year ago

please where did the 40 come from

nora655

2 months ago

60-20=40
R/20=60/40
=20×60/40=30

zigymoe

3 months ago

why is there not any explanation video

Mudabobo

2 years ago

i didn't understand who can help pls🤲

Doctordanny

3 years ago

Explanation
No official explanation is available for this question at this time. Please check contributions posted by others below. If you can provide an explanation to help other student learn, please click here


Please I have An Explanation But There Is No Place To Click.

It Says Click Here...... I Click It Doesn't Change,

FASANYA OLUWADAMILARE

1 year ago

I don't understand

King33Victor

3 months ago

the question is from meter Bridge

innogson

1 year ago

🧱 What we have:
A 1-meter (100 cm) long wire XY.

A galvanometer connected at point Z, which is at 60 cm from X.

A known resistor of 20Ω on one side.

An unknown resistor
𝑅
R on the other side.

The bridge is said to be balanced at point Z.

🧠 Important Concept: Wheatstone Bridge Balance Condition
At balance point (no current through galvanometer):

𝑅
1
𝑅
2
=
𝐿
1
𝐿
2
R
2
​

R
1
​

​
=
L
2
​

L
1
​

​

Where:

𝑅
1
=
𝑅
R
1
​
=R (unknown resistor)

𝑅
2
=
20

Ω
R
2
​
=20 Ω

𝐿
1
=
60
cm
L
1
​
=60 cm

𝐿
2
=
40
cm
L
2
​
=40 cm (since the total length is 100 cm)

Step-by-step Solution:
𝑅
20
=
60
40
20
R
​
=
40
60
​

𝑅
20
=
3
2
20
R
​
=
2
3
​

Multiply both sides by 20:

𝑅
=
20
×
3
2
=
30

Ω
R=20×
2
3
​
=30 Ω
Final Answer: D. 30.0Ω

Nkoshi

3 years ago

Solution