AB is a potentiometer wire of length 100...

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

`0.8V`

`1.6V`

`0.08V`

`0.16V`

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

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

Similar Questions

Explore conceptually related problems

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

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:

A potentiometer has a wire of 100cm length and its resistance is 10 Ohms.It is connected in series with a resistance of 40 ohms and a battery of emf 2V and negligible internal resistance.If a source of unknown emf E connected in the secondary is balanced by 40cm length of potentiometer wire the value of 'E' is

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 100 cm having a resistance of 10 Omega is connected in series with a resistance R and a cell of emf 2V of negligible internal resistance. A source of emf of 10 mV is balanced against a length of 40 cm of the potentiometer wire. What is the value of resistance R ?

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___

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 :-

DC PANDEY-CURRENT ELECTRICITY-Taking it together

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
|
Two wire of the same meta have same length, but their cross-sections a...
Text Solution
|
The masses of the three wires of copper are in the ratio 5:3:1 and the...
Text Solution
|
If power dissipated in the 9 Omega resistor in the circuit shown is 36...
Text Solution
|
The reading of the ammeter in the following figure will be
Text Solution
|
A wire of length 100 cm is connected to a cell of emf 2 V and negli...
Text Solution
|
Two uniform wires A and B are of the same total metal and have equal m...
Text Solution
|
In the given circuit, the resistances are given in ohm. The current t...
Text Solution
|
The current I drawn from the 5 volt source will be
Text Solution
|
The current in the given circuit is
Text Solution
|
Two resistors 400Omega and 800Omega are connected in series with a 6V ...
Text Solution
|
A battery of emf E has an internal resistance r. A variable resistacne...
Text Solution
|
Two resistances are connected in the two gaps of a meter bridge. The b...
Text Solution
|
A battery of four cells in series, each having an emf of 1.14 V and an...
Text Solution
|
The length of a wire of a potentiometer is 100 cm, and the e.m.f. of i...
Text Solution
|
When a resistance of 100Omega is connected in series with a galvanomet...
Text Solution
|