PHYSICS SAMPLE QUESTION SET 1

   

  1. A FORCE OF 2.5 N IS EXPERIENCED BY A POINT OF CHARGE OF 5 X 10^-6 C AT A POINT IN AN ELECTRIC FIELD . THE POTENTIAL GRADIENT AT THAT POINT IN SI UNIT IS ………

2. THE DIMENSION OF ELECTRIC PERMITIVITY  IS …..

3. THE FORCE BETWEEN TWO PARALLEL CURRENT CARRYING CONDUCTORS SEPARATED BY A DISTANCE ‘X’ IS  ‘ F’  . IF THE CURRENT IN EACH CONDUCTER IS DOUBLED AND THE DISTANCE BETWEEN THEM IS HALVED , THEN THE FORCE BETWEEN THEM BECOMES……                          I)  F       II) 2F     III)     4F      IV)      8F

4. FORCE F BETWEEN CHARGE Q1 AND Q2 SEPARATED BY r IS 25 N . IT CAN BE REDUCED TO 5N IF THE SEPARATION BETWEEN THEM IS MADE                                                                                                        I)  r/5      II)     r/2       III)     2r     IV)    √5      

5. THE ELECTRIC POTENTIAL AT A POINT IN AN ELECTRIC FIELD HAS THE UNIT OF 

6. THE POTENTIAL DIFFERENCE ACROSS A CONDUCTER IS DOUBLED .THE AMMOUNT OF HEAT GENERATED PER SECOND WILL BE : …….

7. AN ELECTRON IS ACCELERATED UNDER A POTENTIAL  DIFFERENCE OF 200V . ENERGY GAINED BY IT IN ELECTRON VOLT IS ………..

8.  AN ELECTRON IS ACCELERATED UNDER A POTENTIAL DIFFERENCE OF 100V .ENERGY OBTAINED BY IT IN ELECTRON VOLT IS ………..

9. WHAT IS THE UNIT OF ELECTRIC FIELD INTENSITY…….

10. AN ISOLATED  POINT CHARGE IS PLACED IN A HOMOGENEOUS , ISOTROPIC MEDIUM . THE EQUIPOTENCIAL SURFACE DUE TO THE CHARGE ARE :                                                    I) CYLINDRICAL       II)  SPERICAL          III)  ELLIPTICAL     IV)   HYPERBOLOID

11.TWO ELECTRICAL CONDUCTING WIRES ARE CONNECTED IN PARALLEL . THE RESULTANT RESISTANCE OF THE COMBINATION IS 0.5 OHM . ONE OF THESE HAS A RESISTANCE OF 1 OHM . THE RESISTANCE OF OTHER IS……..

12. THREE IDENTICAL 3V BATTERIES ARE CONNECTED IN PARALLEL . THE EMF OF THE COMBINATION IS ………….

13. THE UNIT OF ELECTRIC DIPOLE MOMENT IS  …….

14. THE RELATION BETWEEN THE CAPACITANCE OF AN ISOLATED SPEHRICAL CONDUCTOR SITUATED IN AIR AND ITS RADIUS IS …….

15.TWO LIKE POINT CHARGES SEPARATED BY A CERTAIN DISTANCE EXERT A FORCE OF 0.04 N ON EACH OTHER . WHEN THE DISTANCE OF SEPARATION BETWEEN THEM IS HALVED , THE FORCE EXERTED BY EACH ON THE OTHER WILL BE  ………..

16. DRIFT VELOCITY OF ELECTRONS IN A CONDUCTOR IS OF THE ORDER OF ……..

17. A CONDUCTING WIRE OF UNIFORM CROSS SECTIONAL AREA ‘a’ , LENGTH ‘l’  AND ELECTRICAL RESISTANSE ‘R’ IS CUT INTO EQUAL PIECES OF LENGTH ½ EACH . THE RESISTIVITY OF EACH PART COMPARED TO THAT OF ORIGINAL WIRE   IS ………..

18. THE MAGNETIC DIPOLE MOMENT PER UNIT VOLUME OF A MAGNETIC  MATERIAL IS CALLED ITS ……..

19. THE DIMENSION OF MAGNETIC FLUX IS …….

20. TWO THIN , LONG AND PARALLEL WIRES SEPARATED BY A DISTANCE d CARRY A CURRENT i AMPERE EACH . THE MAGNITUDE OF THE FORCE PER UNIT LENGTH EXERTED BY ONE WIRE ON THE OTHER IS …….

21.THE UNIT OF MAGNETIC PERMEABILITY OF VACCUM IS…..

22. A BEAM OF PROTONS IS DIRECTED ALONG NEGATIVE X- AXIS IN A UNIFORM MAGNETIC FIELD ACTING ALONG THE Y-AXIS .THE BEAM IS DEFLECTED ALONG                                                                                  I) +Y AXIS     II) –Z AXIS     III)  + XAXIS        IV)  ALINE IN XY PLANE

23.A SMALL BAR MAGNET HELD VERTICALLY IS ALLOWED TO FALL FROM A HEIGHT THROUGH A METAL RING OF RADIUS 0.1M . THE ACCELERATION OF THE MAGNET SHALL BE                                   I) ZERO    II) GRATER THAN g                  III) LESS THAN g      IV)  EQUAL TO g

24.THREE CELLS OF EMF 2V,5V, AND 7V ARE CONNECTED IN PARALLEL . THE EFFECTIVE EMF OF THE COMBINATION IS ……

25.WHICH RULE DECIDES THE DIRCTION OF MAGNETIC LINES OF FORCE DUE TO A STRAIGHT WIRE CARRYING CURRENT  ? …….    

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