get affected? A In the given circuit, assuming point to be at zero potential, use Kirchhoff’s rules to determine 17 2011 B. the potential at point Show that the electric field at the surface of a charged conductor is given by 18 2007 0) E = n, $ is n where the surface charge density and is a unit vector normal to the surface in the outward direction. The plot of the variation of potential difference across a combination of three identical cells in 19 2008 series, versus current is as shown below. What is the emf of each cell ? A cell of emf ‘E’ and internal resistance ‘r’ is connected across a variable resistor ‘R’. Plot a 20 2009 graph showing the variation of terminal potential ‘V’ with resistance R. Predict from the graph the condition under which ‘V’ becomes equal to ‘E‘. Derive an expression for drift velocity of free electrons in a conductor in terms of relaxation 21 2009 time. Ω 22 A wire of 15 resistances is gradually stretched to double its original length. It is then cut into 2009 two equal parts. These parts are then connected in parallel across a 3 00 volt battery. Find the current drawn from the battery. k10% (a) You are required to select a carbon resistor of resistance 47 from a large 23 2012 collection. What should be the sequence of colour bands used to code it? (b) Write the characteristics of manganin which make it suitable for making standard resistance. THREE MARKS QUESTIONS In the two electric circuits shown in the figure, determine the readings of ideal 1 2015 Ammeter (A) and the ideal voltmeter (V). In the circuit shown in the figure, find the current through each resistor. 2 2015 (a) Deduce the relation between current I flowing through a conductor and drift 3 2014 velocity d of the electrons. (b) Figure shows a plot of current flowing through the cross-section of a wire ‘I’ versus the Use the plot to find the charge flowing in 10s through the wire.. time‘t’. A cell of emf and internal resistance is connected across a variable load ‘E’ ‘r’ 4 2013 resistor R. Draw the plots of the terminal voltage V versus (i) R and (ii) the current I. It is found that when R = 4 the current is 1 A and when R is increased to 9 the , ,
get affected? 17 In the given circuit, assuming point A to be at zero potential, use Kirchhoff’s rules to determine the potential at point B. 2011 18 Show that the electric field at the surface of a charged conductor is given by E = 0) n, where is the surface charge density and $ n is a unit vector normal to the surface in the outward direction. 2007 19 The plot of the variation of potential difference across a combination of three identical cells in series, versus current is as shown below. What is the emf of each cell ? 2008 20 A cell of emf ‘E’ and internal resistance ‘r’ is connected across a variable resistor ‘R’. Plot a graph showing the variation of terminal potential ‘V’ with resistance R. Predict from the graph the condition under which ‘V’ becomes equal to ‘E‘. 2009 21 Derive an expression for drift velocity of free electrons in a conductor in terms of relaxation time. 2009 22 A wire of 15 Ω resistances is gradually stretched to double its original length. It is then cut into two equal parts. These parts are then connected in parallel across a 3 00 volt battery. Find the current drawn from the battery. 2009 23 (a) You are required to select a carbon resistor of resistance 47 k10% from a large collection. What should be the sequence of colour bands used to code it? (b) Write the characteristics of manganin which make it suitable for making standard resistance. 2012 THREE MARKS QUESTIONS 1 In the two electric circuits shown in the figure, determine the readings of ideal Ammeter (A) and the ideal voltmeter (V). 2015 2 In the circuit shown in the figure, find the current through each resistor. 2015 3 (a) Deduce the relation between current I flowing through a conductor and drift velocity d of the electrons. (b) Figure shows a plot of current ‘I’ flowing through the cross-section of a wire versus the time‘t’. Use the plot to find the charge flowing in 10s through the wire.. 2014 4 A cell of emf ‘E’ and internal resistance ‘r’ is connected across a variable load resistor R. Draw the plots of the terminal voltage V versus (i) R and (ii) the current I. It is found that when R = 4 , the current is 1 A and when R is increased to 9 , the 2013
T.Kar%20Phy..docx