HARD
12th ICSE
IMPORTANT
Earn 100

Draw a labelled circuit diagram of a potentiometer to measure internal resistance of a cell. Write the working formula. (Derivation not required).

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 1
Define emf of a cell and its terminal potential difference. Show that emf of cell is greater than terminal potential difference, when current is withdrawn and emf is lesser when cell is being charged.
HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 2
Draw circuit diagram of a balanced Wheatstone bridge and obtain the relationship among the resistors used. Write its applications.
HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 3
State Kirchhoffs laws for electric circuits and write the corresponding association of conservation of the quantities. Draw diagram in support of laws.
HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 4
Write the principle of potentiometer, draw its circuit diagram. How its sensitivity can be increased? Why it is called as ideal voltmeter?
HARD
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 6 - DC Circuits and Measurements>QUESTIONS>Q 5
Draw circuit diagram of potentiometer to determine internal resistance of a cell. Derive the formula used for internal resistance of a cell.
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.