What will be the resistance of a metal wire of length 2 metres and area of cross-section 1.55 × 10 - 6 m 2 , if the resistivity of the metal be 2.8 × 10 - 8 Ωm ?

Given that, length of wire, l = 2 m Area of a cross-section of the wire, A = 1.55 × 10 - 6 m 2 The resistivity of the metal, ρ = 2.8 × 10 - 8 Ωm R = ρ l A = 2.8 × 10 - 8 × 2 1.55 × 10 - 6 = 0.036 Ω

What will be the resistance of a metal wire of length 2 metres and area of cross-section 1.55 × 10 - 6 m 2 , if the resistivity of the metal be 2.8 × 10 - 8 Ωm ?

Given that, length of wire, l = 2 m Area of a cross-section of the wire, A = 1.55 × 10 - 6 m 2 The resistivity of the metal, ρ = 2.8 × 10 - 8 Ωm R = ρ l A = 2.8 × 10 - 8 × 2 1.55 × 10 - 6 = 0.036 Ω

E M B I B E

Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Short Answer Type Questions>Q 15

EASY

10th CBSE

IMPORTANT

Earn 100

What will be the resistance of a metal wire of length $2 metres$ and area of cross-section $1.55 \times 10^{- 6} m^{2}$ , if the resistivity of the metal be $2.8 \times 10^{- 8} Ωm$ ?

Important Questions on Electricity

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Short Answer Type Questions>Q 16

Give two examples of substances which are good conductors of electricity. Why do you think they are good conductors of electricity?

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Short Answer Type Questions>Q 16

Calculate the resistance of a copper wire

1.0 km

long and

0.50 mm

diameter if the resistivity of copper is

1.7 \times 10^{- 8} Ωm

.

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Short Answer Type Questions>Q 17

Will current flow more easily through a thick wire or a thin wire of the same material when connected to the same source? Give a reason for your answer.

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Short Answer Type Questions>Q 18

How does the resistance of a conductor depend on: length of the conductor?

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Short Answer Type Questions>Q 18

How does the resistance of a conductor depend on: area of cross-section of the conductor?

EASY

10th CBSE