Introduction to Computer

The Plates of a charged capacitor are connected by a voltmeter. If the scales of the capacitor are moved make headway apart. What will be the effect on the reading of the voltmeter? 1 2. 3. What is the function of di voltaic in a capacitor? A steam of electrons travelling with speed ? m s at right angles to a uniform e v2 = ? m rE 1 2 electric field E is deflected in a circular way of radius r. Prove that 4. The distance between the plates of a parallel plate capacitor is d.A metal plate of thickness (d/2) is placed between the plates. What will be the effect on the capacitance? 2 5. Keeping the voltage of the charging source constant. What would be the percentage change in the energy stored in a parallel plate capacitor if the separation between its plates were to be decreased by 10%? 3 6. Two identical plane metallic surfaces A and B are unploughed parallel to each other in air separated by a distance of 1. 0 cm as shown in the figure. Surface A is given a positive potential of 10V and the outer surface of B is earthed. a) What is the magnitude and direction of uniform electric field between point Y and Z? What is the work done in moving a change of 20 c from point X to Y? (b) Can we have non-zero electric potential in the space, where electric field strength is zero? 3B A X Z Y Material downloaded from http//myCBSEguide. com and http//onlineteachers. co. in Portal for CBSE Notes, Test Papers, pattern Papers, Tips and Tricks 7. Figure (a) and (b) shows the field lines of a single positive and negative changes respectively 5 a) Give the signs of the potential difference Vp ? Vq and VB VA (b) Give the sign of the work done by the field in moving a small positive change from Q to P. (c) Give the sign of the work done by the field in foreign agency in moving a small negative change from B to A. 8. With the help of a labelled diagram, explain the principle, construction and working of a vandegraff generator. Mention its applications? 5 Material downloaded from http//myCBSEguide. com and http//onlineteachers. co. in Portal for CBSE Notes, Test Papers, Sample Papers, Tips and Tricks