Factors Affecting Resistance & How They Affect

Q. Which of the following graphs is incorrect for a conductor at a given temperature?

1. 
2. 
3. 
4. 

Q.

On what factors does the resistance fo a conductor depend?

Q.

What is the resistance of a conductor ? Mention the factors of the resistance of a conductor depend

Q. Question 6
A copper wire has diameter 0.5 mm and resistivity of $1.6\times {10}^{-8}\Omega m$. What will be the length of this wire to make its resistance $10\Omega$ ? How much does the resistance change if the diameter is doubled?

Q.

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

Q. We stretch a wire of resistance $R$ such that its length increases by 20%. Then the percentage change in its resistance will be?

1. 20%
2. 44%
3. 10%
4. 40%

Q.

If the diameter of a resistance wire is halved, then its resistance becomes:
(a) four times (b) half (c) one - fourth (d) two times

Q.

Question 7
The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below −

Plot a graph between V and I and calculate the resistance of that resistor.

Q. If a wire of resistance 'R' is stretched twice its original length keeping volume constant then what will be its new resistance?
(let new resistance as R')

1. 2R
2. R/3
3. 4R
4. R/2

Q.

If an increase in the length of copper wire is 25% due to stretching, the percentage increase in its resistance will be:

1. 1.5%

2. 1%

3. 2%

4. 0.2%

Q.

If the length of a wire is doubled by taking more of wire, what happens to its resistance?

Q.

A wire of resistance 9 ohm having length 30 cm is tripled on itself. What is its new resistance?

Q.

What is cross section of conductor?

Q.

What length of copper wire of specific resistance $1.7\times {10}^{-8}\Omega$ m and radius 1 mm is required so that its resistance is $1\Omega$

Q.

A wire of resistance 3 ohm and length 10 cm is stretched to length 30 cm. Assuming that it has a uniform cross-section, what will be its new resistance?

Q.

What is the change in resistance of a wire which is stretched triple its length?

Q.

Nine identical wires each of diameter d and length L are connected in parallel. The combination has the same resistance as a single similar wire of length $L$ but whose diameter is ____.

Q.

A thick wire has smaller resistance while a thin wire has larger resistance.

1. True

2. False

Q.

Certain wire has resistance of 10 Ohm. If it is stretched by 1/10th of its length, then its resistance is nearly:

1. 11 Ω

2. 9 Ω

3. 10 Ω

4. 12 Ω

Q.

How does the resistance of a wire change when
(i) its length is tripled?
(ii) its diameter is tripled?
(ii) its material is chanaged to one whose resistivity is three times?

Q.

How does the resistance of a wire depend on its length? Give a reason for your answer.

Q.

Resistance of a metallic conductor does not depend on its length.

1. True

2. False

Q.

Two wires of the same material and same length have radii 1 mm and 2 mm respectively. Compare (i) their resistances, (ii) their specific resistance.

Q.

State the factors affecting resistance of a conductor.

Q.

State two properties of high tension wires.

Q. The resistance of 100 m long copper wire with diameter 1 mm is ___ ohms. (${\text{Copper}}_{\rho }=1.6\times {10}^{-8})$ ohm-m

1. 2.04
2. 20.4
3. 0.204
4. 204

Q.

How does the resistance of a wire change when it's length is tripled?

Q.

A particular rsistance wire has a resistance of 3.0 ohm per metre. Find:
(a) The total resistance of three lengths of this wire each 1.5 m long, joined in parallel.
(b) The potential difference of the battery which gives a current of 2.0 A in each of the 1.5 m length when connected in parallel to the battery (assume that the resistance of battery is negligible).
(c) The resistance of 5 m length of a wire of the same material, but with twice the area of cross-section.

Q.

A wire of resistance 20 Ohm is bent to form a closed square . What is the resistance across a diagonal of the square?

Q. If resistance of sorting of a wire is 1 ohm then the resistance of a similar nichrome wire will be about:?
Please provide me with an answer