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Consider the following statements The equivalent emf is equal to the individual emf of the cells in the series combination of cells having the same emf.  The equivalent emf is equal to the individual emf of the cells in the parallel combination of cells having the same emf. Which of the following statement is correct?
A thermocouple-based temperature measurement system is shown in the adjoining figure. Relevant thermocouple emf data (in mV) is given below. The cold junction is kept at 0°C. The temperature is 30°C in the other parts of the system. The emf V is measured to be 26.74 mV. Th temperature of the hot liquid is Temp. emf of Chromel- Constantan emf of Copper- Constantan 10°C 0.591 0.391 20°C 1.192 0.789 30°C 1.801 1.196 370°C 26.549 19.027 380°C 27.345 19.638
Consider the following statements regarding electromechanical devices: 1. A potentiometer has an input of rotation and an output of a potential difference. 2. An electric motor has an input of a potential difference and an output of rotation of a shaft. 3. A generator has an input of rotation of a shaft and an output of a potential difference Which of the above statements are correct?
The elastic potential energy of a body is
1. Work done by the external force against the deforming force.
2. Work done against the external force by the deforming force.
3. The sum of work done by the external force and the deforming force.
Which one option is true?
Which is the emf(electromotive force) induced in a coil if it has 8 turns and rate of change of flux with respect to time is 0.5?
Which is has the number of turns in a coil if the emf (electromotive force) induced in it is -2.5V and rate of change of flux with respect to time is 0.5?
Which is the emf (electromotive force) induced in a coil if it has 10 turns and rate of change of flux with respect to time is 1?
The unit of electromotive force (emf) is
In the electromotive series, the metal with more negative oxidation potential displaces the metal with more positive potential.
Which of the following is a correct method to calculate the EMF of a galvanic cell? + b) Standard EMF of the cell = – c) E°cell = E°cathode – E°anode d) Standard EMF of the cell = +