MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Equivalent Resistance of a System of Resistor

Use the follo...

Question

Use the following information to answer the next question.

The length of a copper rod at 35°C is measured to be 1.5 m by an aluminium tape, which is correct at 15°C. Assume that the coefficients of linear expansion for aluminium and copper are 2.5 × 10 ^{− 15}/K and 1.7 × 10 ^{− 5}/K respectively.

What is the length of the copper rod at temperature 15°C?

A

1.49948 m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

1.500024 m

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

C

1.51001 m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

1.52002 m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B
1.500024 m

Suggest Corrections

thumbs-up

0

Similar questions

An Iron rod and a copper rod lie side by side. As the temperature is changed, the difference in the lengths of the rods remains constant at a value of 10 cm. Find the lengths at $0^{\circ} C$ . Coefficients of linear expansion of iron and copper are $1.1 \times 10^{- 6} /^{\circ} C$ and $1.7 \times 10^{- 5} /^{\circ} C$ respectively.

Q. A brass rod of length

40 c m

is joined to a copper rod of length

50 c m

. The two rods are of the same thickness and at initial temperature of

40^{\circ} C

. What is the change in length of the combine rod, when the same is heated to

280^{\circ} C

. Coefficients of linear expansion of brass and copper are

1.9 \times 10^{- 5}^{\circ} C^{- 1}

1.7 \times 10^{- 5}^{\circ} C^{- 1}

Q. A brass rod of length

40 c m

is joined to a copper rod of length

50 c m

. The two rods are of the same thickness and at an initial temperature of

40^{o} C

. What is the change in length of the combined rod, when the same is heated to

280^{o} C .

Coefficients of linear expansion of brass and copper are

1.9 \times 10^{- 5}^{o} C^{- 1}

1.7 \times 10^{- 5}^{o} C^{- 1}

Q. What should be lengths of steel and copper rod, so that the length of steel rod is

5 c m

longer than the copper rod at all temperature?

(α

= 1.7 \times 10^{- 5}^{\circ} C^{- 1}

α

= 1.1 \times 10^{- 5}^{\circ} C^{- 1})

Q. An iron rod of length

50 c m

is joined at an end to an aluminium rod of length

100 c m

. All measurements are made at

20^{\circ} C

. Find the length of the composite system at

100^{\circ} C

and its average coefficient of linear expansion. The coefficient of linear expansion of iron and aluminium are

12 \times 10^{- 6} /^{\circ} C

24 \times 10^{- 6} /^{\circ} C

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

PHYSICS

Watch in App

explore_more_icon

Explore more

Equivalent Resistance of a System of Resistor

Standard X Physics

Join BYJU'S Learning Program

CrossIcon