AB is a potentiometer wire of length 100...

AB is a potentiometer wire of length 100 cm and its resistance is 10 `Omega`. It is connected in series with a battery of emf 2V and resistance 40 `Omega`. If a source of unknown emf E is balanced by 40 cm length of the potentiometer wire, the value of E is :-

0.8 V

1.6 V

0.08 V

0.16 V

Text Solution

Verified by Experts

The correct Answer is:

`=0.16` V

Topper's Solved these Questions

NEET DRILL 3
NEET MAJOR TEST (COACHING)|Exercise PHYSICS|45 Videos
NEET DRILL TEST 5
NEET MAJOR TEST (COACHING)|Exercise PHYSICS|45 Videos

Similar Questions

Explore conceptually related problems

AB is a potentiometer wire of length 100 cm and its resistance is 10Omega . It is connected in series with a resistance R = 40 Omega and a battery of emf 2 V and negligible internal resistance. If a source of unknown emf E is balanced by 40 cm length of the potentiometer wire, the value of E is

AB is a potentiometer wire of length 100cm and its resistance is 10ohm. It is connected in series with a resistance R=40 ohm and a battery of e.m.f. wV and negigible internal resistance. If a source of unknown e.m.f. E is balanced by 40cm length of the potentiometer wire, the value of E is:

AB is a potentiometer wire of length 100 cm and its resistance is 10 ohms . It is connected in series with a resistance R = 10 ohms and a battery of e.m.f. 2 V and negligible internal resistance. If a source of unknown e.m.f. E is balanced by 40 cm length of the potentiometer wire, the value of E is

A potentiometer wire of lengthh 100 cm has resistance 5Omega . It is connected in series with a resistance and a cell of emf 2 v and of negligible internal resistance. A source of emf 5 mv balanced by 10 cm length of potentiometer wire. The value of external resistance is___

A potentiometer wire of length 1m and resistance 20 Omega is connected in series with a 15V battery and an external resistance 40 Omega . A secondary cell of emf E in the secondary circuit is balanced by 24 cm long potentiometer wire. The emf E of the cell is ,

A potentiometer wire of Length L and a resistance r are connected in series with a battery of e.m.f. E_(0) and a resistance r_(1) . An unknown e.m.f. E is balanced at a length l of the potentiometer wire. The e.m.f. E will be given by :

A potentiometer wire of length 100 cm has a resistance of 100Omega it is connected in series with a resistance and a battery of emf 2 V and of negligible internal resistance. A source of emf 10 mV is balanced against a length of 40 cm of the potentiometer wire. what is the value of the external resistance?

A potentiometer wire of length 10 m and resistance 30 Omega is connected in series with a battery of emf 2.5 V , internal resistance 5 Omega and an external resistance R . If the fall of potential along the potentiometer wire is 50 mu V mm^(-1) , then the value of R is found to be 23 n Omega . What is n ?

NEET MAJOR TEST (COACHING)-NEET DRILL 4 -PHYSICS

For intensity I of a light of wavelength 5000 Å the photoelectron satu...
Text Solution
|
In a common emitter amplifier, using output reisistance of 5000 ohm an...
Text Solution
|
AB is a potentiometer wire of length 100 cm and its resistance is 10 O...
Text Solution
|
Our earth behaves as it has a powerful magnet within it. The value of ...
Text Solution
|
A coil has a resistance of 10 Omega and an inductance of 0.4 henry. It...
Text Solution
|
An electron of mass m when accelerated through a potential difference ...
Text Solution
|
In the following circuit the equivalent resistance between A and B is ...
Text Solution
|
If a cell is flowing current through external resistance then curve be...
Text Solution
|
Two particles X and Y having equal charges, after being accelerated th...
Text Solution
|
Figure shows a cross section of a ‘light pipe’ made of a glass fibre o...
Text Solution
|
The energy that should be added to an electron, to reduce its de-Brogl...
Text Solution
|
The currents l, lZ and lL are respectively :-
Text Solution
|
The potential difference between the plates of a parallel plate capaci...
Text Solution
|
Figure shows an irregular shapped wire AB moving with velocity v. Find...
Text Solution
|
An extended object of size 2 cm is placed at a distance of 10 cm in ai...
Text Solution
|
If the radiation of Mo (Z = 42) has a wevelength of 0.71Å, calculate w...
Text Solution
|
A load resistance of 3 kOmega is connected in the collector circuit of...
Text Solution
|
A parallel plate air capacitor has capacitance 18muF. If the distance ...
Text Solution
|
A small circular loop is suspended from an insulating thread. Another ...
Text Solution
|
For a long sighted person, least distant of distinct vision is x meter...
Text Solution
|