The resistivity of a potentiometer wire ...

The resistivity of a potentiometer wire is `40xx10^(-8)Omega-m` and its area of cross section is `8xx10^(-6)m^(2)`. If 0.2 A current is flowing through the wire the potential gradient will be

`10^(-2)V//m`

`10^(-1)V//m`

`3.2xx10^(-2)V//m`

`1V//m`

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

CURRENT ELECTRICITY
DC PANDEY ENGLISH|Exercise B. Assertion and reason|18 Videos
CURRENT ELECTRICITY
DC PANDEY ENGLISH|Exercise Match the columns|4 Videos
CURRENT ELECTRICITY
DC PANDEY ENGLISH|Exercise Check point|70 Videos
COMMUNICATION SYSTEM
DC PANDEY ENGLISH|Exercise Subjective|11 Videos
ELECTROMAGNETIC INDUCTION
DC PANDEY ENGLISH|Exercise Medical entrances gallery|25 Videos

Similar Questions

Explore conceptually related problems

Resistivity of potentiometer wire is 10^(-7) ohm metre and its area of cross-section is 10^(-6)m^2 . When a current l=0.1A flows through the wire, its potential gradient is:

The resistivity of a potentiometer wire is, if the area of cross section of the wire is 4cm^(2) . The current flowing in the circuit is 1A, the potential gradient is 7.5 v/m _______

A wire made of aluminum having resistivity rho = 2.8 xx10^(-8) Omega - m with a circular cross - section and has a radius of 2xx10^(-3) m. A current of 5 A flows through the wire . If the voltage difference between the ends is 1 V , the length of the wire in m is

If specific resistance of a potentiometer wire is 10^(–7 ) Omega m , the current flow through it is 0.1 A and the cross-sectional area of wire is 10^(–6) m^(2) then potential gradient will be

The specific resistance and area of cross section of the potentiometer wire are rho' and A respectively. If a current i passes through the wire, its potential gradient will be

If the resistivity of a potentiometer wire be rho and area of cross-section be A , then what will be potential gradient along the wire

A potentiometer wire has resistance 40Omega and its length is 10m. It is connected by a resistance of 760Omega in series if emf of battery is 2V then potential gradient is:-

The length of a potentiometer wire is 10m and a potential difference of 2 volt is applied to its ends. If the length of its wire is increased by 1m, the value of potential gradient in volt/m will be (potential difference across potentiometer wire remain same)

The current in the primary circuit of a potentiometer is 0.2 A . The specific resistance and cross-section of the potentiometer wire are 4xx10^(-7) ohm meter and 8xx10^(-7)m^(2) respectively. The potential gradient will be equal to -

The wire of potentiometer has resistance 4 Omega and length 1m. It is connected to a cell of e.m.f. 2V and internal resistance 1 Omega . The current flowing through the potentiometer wire is

DC PANDEY ENGLISH-CURRENT ELECTRICITY-Taking it together

A metel rod of the length 10cm and a rectangular cross-section of 1 cm...
Text Solution
|
Two cells of emfs approximately 5V and 10V are to be accurately compar...
Text Solution
|
The resistivity of a potentiometer wire is 40xx10^(-8)Omega-m and its ...
Text Solution
|
Two cells of emfs E(1) and (E(2) (E(1) gt E(2)) are connected as shows...
Text Solution
|
A voltmeter of resistance 998 Omega is connected across a cell of emf ...
Text Solution
|
A wire of 50 cm long, 1mm^(2) in cross-section carries a current of 4 ...
Text Solution
|
Three resistance P, Q, R each of 2 Omega and an unknown resistance S f...
Text Solution
|
A 2 V battery, a 990Omega resistor and a potentiometer of 2 m length, ...
Text Solution
|
The electron with change (q=1.6xx10^(-19)C) moves in an orbit of radiu...
Text Solution
|
Two resistance wires on joining in parallel the resultant resistance i...
Text Solution
|
A potentiometer having the potential gradient of 2 mV//cm is used to m...
Text Solution
|
The n rows each containinig m cells in series are joined parallel. Max...
Text Solution
|
A 100 V voltmeter of internal resistance 20 k Omega in series with a h...
Text Solution
|
A cell supplies a current i(1) trhough a resistnace R(1) and a current...
Text Solution
|
Out of five resistance of ROmega each 3 are connected in parallel and ...
Text Solution
|
Two batteries A and B each of e.m.f. 2 V are connected in series to a...
Text Solution
|
For a cell of e.m.f. 2 V , a balance is obtained for 50 cm of the po...
Text Solution
|
AB is a potentiometer wire of length 100 cm and its resistance is 10Om...
Text Solution
|
Equivalent resistance between the points A and B (in Omega) .
Text Solution
|
In the circuit shown here, what is the value of the unknown resistor R...
Text Solution
|