Home
Class 12
PHYSICS
A certain thermocouple (treat is as a se...

A certain thermocouple (treat is as a seat of emf) which has a total resistance of 10 `Omega` has one junction in melting ice and the other in stream .The emf between its ends as measured by a potentiometer is 4 mV. What would be its reading when it is connected to mellivoltmeter which has a resistance of 5`Omega`?

Text Solution

Verified by Experts

The correct Answer is:
3.33 m V
Promotional Banner

Topper's Solved these Questions

  • POTENTIOMETER

    NN GHOSH|Exercise EXERCISES|16 Videos

  • POTENTIAL AND FIELD DUE TO A DIPOLE

    NN GHOSH|Exercise Exercise|15 Videos

  • TERRESTRIAL MAGNETISM

    NN GHOSH|Exercise All Questions|7 Videos

Similar Questions

Explore conceptually related problems

A certain thermocouple (treat it as a seat of e.m.f) which has a total resistance of 10Omega has one junction in melting ice and the other junction in melting ice and the other junction is steam. The e.m.f. between its ends as measured with a potentiometer is 4 millivolt. What would be its reading when it is connected to a milli volt meter which has a resistance of 50 ohm?

A voltmeter has a resistance of 1000 Omega . What will be its reading when it is connected across a cell of emf 2V and internal resistance 10 Omega ?

A voltmeter has resistance of 100 Omega . What will be its reading when it is connected across a cells of e.m.f 2 V and internal resistance 20 Omega ?

A circular coil of single turn has a resistance of 20 Omega Which one of the following is the correct value for the resistance between the ends of any diameter of the coil?

A cheap voltmeter with an internal resistance of 30Omega is connected to the terminals of a battery whose internal resistance is 5Omega and true emf 1.5 V. What would be the terminal voltage as read by the voltmeter?

A voltmeter has a resistance of 50 Omega is connected across a cell of e.m.f. 2V and internal resistance 10 Omega . The reading of voltmeter is

A potentiometer wire of length 100 cm has a resistance of 10 Omega . It is connected in series with a resistance R and cell of emf 2 V and of of 40 cm of the potentiometer wire. What is the value of R ?

A wire has a resistance of 16 Omega . It is melted and drawn into a wire of half its length. Calculate the resistance of the new wire. What is the percentage change in its resistance ?

A cell has emf of 2.2 V, when connected to a resistance of 5 Omega , the potential difference between the terminals of the cell becomes 2.1 V, the internal resistance for the cell is