A wire of length 100 cm is connected to...

A wire of length 100 cm is connected to a cell of emf 2 V and negligible internal resistance. The resistance of the wire is `3 Omega`. The additional resistance required to produce a potential drop of 1 milli volt per cm is

`60Omega`

`47Omega`

`57Omega`

`35Omega`

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

A 10 m long wire ofresistance 20 Omega is connected in series with battery of EMF 3V and negligible internal resistance and a resistance of 10 Omega . The potential gradient along the wire is :

A cell of e.m.f. 2 V and negligible internal resistance is connected to a potentiometer wire of resistance 10 Omega and length 4 m. The potential difference per unit length (potential gradient ) of the wire is

A wire of length 1.6m has a resistance 8 Omega is connected to a battery of 2 volts and internal resistance 2Omega . What is the potential gradient ?

A uniform potentiometer wire AB of length 100 cm has a resistance of 5Omega and it is connected in series with an external resistance R and a cell of emf 6 V and negligible internal resistance. If a source of potential drop 2 V is balanced against a length of 60 cm of the potentiometer wire, the value of resistance R is

A potentiometer wire has length 10 m and resistance 20Omega . A 2. 5 V battery of negligible internal resistance is connected across the wire with an 80 Omega series resistance. The potential gradient on the wire will be

A thin copper rod of radius 1mm having an electrical resistance of 100 Omega is connected to battery of emf 12 volts and negligible internal resistance through a wire of negligible resistance. Calculate current density in the wire. Also , calculate the number of electrons entering one and of the rod per seconds.

A potentiometer wire of length 1m and resistance 10 Omega is connected in series with a cell of emf 2V with internal resistance 1 Omega and a resistance box including a resistance R. If potential difference between the ends of the wire is 1 mV, the value of R 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 cell of emf 2 volt and internal resistance 1.5 Omega is connected to the ends of 1 m long wire. The resistance of wire is 0.5 Omega/m . Find the value of potential gradient on the wire.

DC PANDEY-CURRENT ELECTRICITY-Taking it together

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
|
Two cells, having the same emf, are connected in series through an ext...
Text Solution
|
Two wires of the same material but of different diameters carry the sa...
Text Solution
|
Two bulbs consume same energy when operated at 200 V and 300 V , respe...
Text Solution
|
A factory is served by a 220 V supply line. In a circuit protected by ...
Text Solution
|
Two bulbs 60 W and 100 W designed for voltage 220 V are connected in s...
Text Solution
|
A tap supplies water at 22^(@)C, a man takes 1 L of water per min at 3...
Text Solution
|
The mean free path of electrons in a metal is 4 xx 10^(-8)m The elect...
Text Solution
|