EASY
12th CBSE
IMPORTANT
Earn 100

A cell of emf  'ξ' and internal resistance 'r' is connected across a variable load resistor R. Draw the plots of the terminal voltage V versus (i) R

Important Questions on Current Electricity

MEDIUM
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 36
A cell of emf  'ξ' and internal resistance 'r' is connected across a variable load resistor R. Draw the plots of the terminal voltage V versus  the current I.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 37
Distinguish between emf (ξ) and terminal voltage (V) of a cell having internal resistance'r'. Draw a plot showing the variation of terminal voltage (V) vs the current (I) drawn from the cell. Using this plot, how does one determine the emf and the internal resistance of the cell ?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 38
A cell of emf ξ and internal resistance r is connected across a variable resistance R. Plot graphs showing the variation of (i) E and R. Predict from the second graph under which V becomes equal to ξ.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 38
A cell of emf ξ and internal resistance r is connected across a variable resistance R. Plot graphs showing the variation of terminal p.d. V with R. Predict from the second graph under which V becomes equal to ξ.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 39
Two identical cells, each of emf ε and internal resistance r are connected in parallel to an external resistance R. Find the expression for the total current flowing in the circuit.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 40
Two cells of emf ε1 and ε2 and internal resistances r1 and r2 respectively are connected in parallel. Obtain expressions for the equivalent
(i) resistance. Write the corresponding formulae for the series combination.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 40
Two cells of emf ε1 and ε2 and internal resistances r1 and r2 respectively are connected in parallel. Obtain expressions for the equivalent emf of the combination.
Write the corresponding formulae for the series combination.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Text Based Exercises>Q 41
Name any one material having a small value of temperature coefficient of resistance. Write one use of this material.