Home
Class 12
PHYSICS
A potentiometer wire has a resistivity o...

A potentiometer wire has a resistivity of `10^(9)Omega` cm and area of cross-section is `10^(-2)"cm"^(2)`. If current of `0.01" mA"` passes through the wire, potential gradient is

A

`10^(9)"V"//"m"`

B

`10^(10)"V"//"m"`

C

`10^(11)"V"//"m"`

D

`10^(8)"V"//"m"`

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

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

A galvanometer has a resistance of 16 Omega and gives a full scale deflection, when a current of 20 mA is passed through it. The only shunt resistance available is 0.04 Omega which is not appropriate to convert galvanometer into an ammeter. How much resistance should be connected in series with coil of galvanometer so that the range of ammeter is 10 A?

A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10^(-7) ohm-metre and the current passing through it is 0.1 ampere, cross-section of the wire is 10^(-6)" m"^(2) . The potential gradient along the potentiometer wire is

A potentiometer wire is 10 m long and has a resistance of 2 Omega//"m". It is connected in series with a battery of e.m.f. 3 V and a resistance of 10Omega . The potential gradient along the wire in V/m is

A potentiometer wire has a resistance per unit length of 0.1 Omega//m . A cell of emf 1.5V balance against 300 cm length of the wire. Find the current through potentiometer wire.

A potentiometer wire has a length of 2m and resistance 10Omega . It is connected in series with resistance 990Omega and a cell of emf 2V. Calculate the potential gradient along the wire.

Find the heat produced in calorie when a current of 0.2 A is passed through a wire of resistance 20.9 ohm for 10 minutes

Calculate the heat produced in calorie when a current of 0.1 A is passed through a wire of resistance 41.8 ohm for 5 minutes.

A potentiometer wire has length 4 m and resistance 8Ω. The resistance that must be connected in series with the wire and an accumulator of e.m.f. 2 V, so as to get a potential gradient 1 mV per cm on the wire is

Fill in the blanks: The electrical work done when a current of 0.1 A is passed through a wire of resistance 200 Omega for 25 seconds is……..