In the Davisson and Germer experiment the velocity of

The value of can be B me obtained by using a specially designed vacuum tube The figure contains a heated filament F and an anode A which is maintained at a positive potential relative to the filament by a battery of known voltage v Electrons get emitted from the heated filament and are accelerated towards the anode which has a small hole in the centre for the electrons to pass through into a region of constant magnetic field B which points into the plain of the paper The electrons then move in a semicircle of diameter d hitting the detector cathode as A F

3 0 50 mm A student measures the time period of 100 oscillations of a simple pendulum four times The data set is 90s 91s 95s and 92s If the minimum division in the measuring clock is 1s then the reported mean time should be 2016 1 92 5 0s 4 0 75 mm 101 9 A scr Main Circu Giver The c 1 C

5 In the circuit shown in figure find the amount of heat generated when switch s is closed SV SON

The measure of mass and volume of a body are 2 00 g and 5 0 cm respectively with possibl errors of 0 01 g and 0 1 cm What would be the maximum permissible error in its density Hint Ad Am AV Ad dx m V Am AV m V where d m V 1

During measurement of kinetic energy T the percentage error in measurement of mass of particle and momentum of particle are 2 and 3 respectively The percentage error in measurement of kinetic energy is a 2 b 5 c 3 d 7

13 A triple slit experiment is performed as shown in the figure with monochromatic light of amplitude au SMS N 8 The graph between resultant amplitude A versus 8 is plotted Choose the correct option s A B C D 42 3 A A20 Sol A C A10 A 20 A 0 2 2n S 2 d 21 3 S S S N 2 2 3 52 42 22 3 3 3 3 M 0 N A A 3 AN RIN N 3 2 D d 27 3 22 2 42 3 3 1 A20 42 3 A10 52 3 A10 A20 8 screen 8 2 where A1o and A20 are the values shown in option A A 0 5 where A10 and A20 are the values shown in option A A10 A20

A student measures the time period of 100 oscillations of a simple pendulum four times The data set is 90 s 91s 92 s and 95 s If the minimum division in the measuring clock is 1s then the reported mean time should be Choose only 1 answer A 92 2 s B 92 5 s C 92 1 8 s

During Searle s experiment zero of the Vernier scale lies between 3 20 x 102 m and 3 25 x 102 m of the main scale The 20th division of the Vernier scale exactly coincides with one of the main scale divisions When an additional load of 2 kg is applied to the wire the zero of the Vernie scale still lies between 3 20 x 102 m and 3 25 x 10 2 m of the main scale but now the 45th divisio of Vernier scale coincides with one of the main scale divisions The length of the thin metallic wir is 2 m and its cross sectional area is 8 x 10 7 m The least count of the Vernier scale is 1 0 105 m The maximum percentage error in the Young s modulus of the wire is 2014

C L V D 6 Which statement is not true in case of relative motion A Relative displacement is independent to the frame of references B Relative separation is independent to the frame of references C Relative velocity is independent to the frame of references D Time is independent to the frame of references

n a meter bridge a standard resistor R ohm is connected in left gap and two dentical wires A and B are connected one after the other in right gap The balancing length measured from left gap is 50 cm If two wires are connected in parallel and put in right gap the balancing length measured from left gap would De in cm 25 Read More 60