A potentiometer consists of a wire of le...

A potentiometer consists of a wire of length 4m. And resistance `10 Omega` is connected to cell of emf 2V The potential difference per unit length of wire will be

`0.5 V //m`

`10 V //m`

`2 V //m`

`5 V //m`

Text Solution

Verified by Experts

Topper's Solved these Questions

MAGNETIC EFFECTS OF CURRENT AND MAGNETISM
SARAS PUBLICATION|Exercise EXAMPLE|45 Videos
MODEL QUESTION PAPER 1
SARAS PUBLICATION|Exercise EXERCISE|43 Videos

Similar Questions

Explore conceptually related problems

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

A potentiometer wire of length L and a resistance r are connected in series with a battery of e.m.f. E_0 is balanced at a length l of the potentiometer wire. The e.m.f. E will be given by

A potentiometer wire has a length 400 cm and a resistance of 20 Omega . It is connected in series with an external resistance R and a cell of e.m.f. 1.5 V and internal resistance 1 Omega . A source of e.m.f.6 mV is balanced against a length of 30 cm of the potentiometer wire. Find R. According to the principle of potentiometer Vpropl . i.e., V = ilp where l'is the balancing length & p the resistance per cm of the potentiometer wire.

A potentiometer wiere has a length of 4 and resistance of 20 Omega . It is connected in series with resistance of 2980 Omega and a cell of emf 4 V. Calcaulte the potential along the wire.

A 10 m long wire of resistance 20Omega is connected in series with a battery of emf 3V and a resistance of 10Omega . The potential gradient along the wire in volt per metre is

A wire of resistance 4 Omega is stretched to twice its original length.The resistance of stretched wire would be

A cell of emf 2V and internal resistance 0.1 Omega is connected with a resistance of 3.9Omega . The voltage across the cell terminals will be

SARAS PUBLICATION-MODEL QUESTION PAPER -3-EXERCISE

Charge Q is given by displacement vecr = ahati + bhatj in an electric ...
Text Solution
|
An electric dipole placed in a non-uniform electric field at an angle ...
Text Solution
|
A potentiometer consists of a wire of length 4m. And resistance 10 Ome...
Text Solution
|
Three equal resistors connected in series across a source of emf toget...
Text Solution
|
If a current carrying coil is placed in magnetic field vecB having mag...
Text Solution
|
The field due to a long straight wire carrying a current I is proporti...
Text Solution
|
Compute the current in the wire if a charge of 120 C is flowing throu...
Text Solution
|
A current carrying loop lying in a magnetic field behaves like a ….
Text Solution
|
The speed of electromagnetic waves in a vacuum is given by…..
Text Solution
|
The amplitude of the magnetic field part of a harmonic electromagnetic...
Text Solution
|
Critical angle of light passing from glass to air is minimum for
Text Solution
|
The focal length of the lens is ….
Text Solution
|
An electron of mass m and charge q is accelerated from rest in a unifo...
Text Solution
|
A radio transmitter operates at a frequency 1000 KHz and a power of 66...
Text Solution
|
Which of the following atoms has the lowest ionisation potential?
Text Solution
|
The ground state energy of hydrogen atom is 13.6 eV. The energy needed...
Text Solution
|
The three lattice constants of a crystal are mutually perpendicular to...
Text Solution
|
In p-n-p transistor circuit, the collector current is 10 mA. If 90 % o...
Text Solution
|
|vecA xx vecB|^2 + |vecA . vecB|^2 is equal to
Text Solution
|
The displacement of a particle along the x-axis is given by x = asin^2...
Text Solution
|