HARD
12th ICSE
IMPORTANT
Earn 100

Draw circuit diagram of potentiometer to determine internal resistance of a cell. Derive the formula used for internal resistance of a cell.

Important Questions on DC Circuits and Measurements

HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 6
Write the factors on which internal resistance of a cell depends. How does current terminal potential difference of a cell and energy supplied to the load (resistor) change with internal resistance of a cell?
HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 1
A cell has an emf of 5.0 V and an internal resistance of 1.0 Ω. Its terminals are joined through a 9 Ω resistor. Calculate the current in the circuit and PD across the terminals of the cell.
HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 2
The potential difference of a cell in an open-circuit is 6 V which falls to 4 V when a current of 2 A is drawn from the cell. Calculate the emf and internal resistance of the cell.
HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 3
The emf of a cell is 2.0 V When it is connected to a 25 Ω resistor, the terminal voltage of the cell is found to be 1.8 V What is the internal resistance of the cell and the current in 25 Ω resistor?
HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 4
The potential difference across a cell is 1.8 V when a current of 0.5 A is drawn from it. The PD falls to 1.6 V when a current of 1.0 A is drawn. Find the emf and the internal resistance of the cell.
MEDIUM
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 5
A battery supplies a current of  0.9 A through a 2.0 Ω resistor and a current of 0.3 A through a 7.0 Ω resistor. Calculate the emf and the internal resistance of the battery.
HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 6
A 200 Ω resistor, a voltmeter and a 2.0 V cell of negligible internal resistance are connected in series. The voltmeter reads 1.0 V Find the resistance of the voltmeter and the current in the circuit.
HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 7
A high-resistance voltmeter connected across the terminals of a battery reads 15 V When an ammeter is included in the circuit, the voltmeter reads 9.0 V and the ammeter reads 1.5 A. Find internal resistance of the battery.