Advertisements
Advertisements
प्रश्न
Three identical cells each of emf 'e' are connected in parallel to form a battery. What is the emf of the battery?
उत्तर
In a parallel combination, emf of the battery = emf of each cell = e.
APPEARS IN
संबंधित प्रश्न
The net resistance of a voltmeter should be large to ensure that ______________ .
Draw a labelled circuit diagram of a potentiometer to measure the internal resistance ‘r’ of a cell. Write the working formula (derivation is not required).
Define or describe a Potentiometer.
Why is a potentiometer preferred over a voltmeter for measuring emf?
State any one use of a potentiometer.
Which of the following is true for a potentiometer?
A cell of e.m.f. 'E' is connected across a resistance 'R'. The potential difference across the terminals of the cell is 90% ofE. The internal resistance of the cell is ______.
A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of emf's is ______.
In the experiment of potentiometer, at balance point, there is no current in the ______.
Two identical thin metal plates has charge q1 and q2 respectively such that q1 > q2. The plates were brought close to each other to form a parallel plate capacitor of capacitance C. The potential difference between them is ______.