Test 13 Code A 6 The magnitude of uniform magnetic field in a small region of Helmholtz coils is nearly N is number of turns in each coil 2 HONI R 4 0 72 NI R 7 Equivalent capacitance between points A and B as shown in the following circuit will be 2C 2C 8 9 3 HONI 2R 2 NI R 3 2C 2C 1 1 m s 3 2 m s 1 C 3 3C Two small blocks each of mass 2 kg are connected by an inextensible string light Blocks are placed over a fixed smooth wedge as shown in the figure and system is released from rest Magnitude of acceleration of both the blocks will be g 10 m s 37 2 20 4 4C 90 A C X O 53 2 2 m s R B A charged particle Q is placed outside a hollow cone on the axis of a cone at a distance x from the centre of its base Electric flux linked with the slant surface of the cone due to the charge is Aa R 3 Medica 1 Zero 3 Q 4 Online Mock Test Series for NEET 2020 Q 250 E 10 A point charge Q is placed off centre inside a thin conducting shell of radius R as shown in the figure K 0 K 4 3 1 KQ 9R 25R Electric field at point P in this situation will be KQ KQ 1 25R 9R 1 Hol 41 31 50m 31 41 50 3 4 Data insufficient 11 A long straight thin wire is placed along z axis Wire carry a current along negative z direction Magnetic field at any point P having coordinates 3 4 0 is given by Hol 3 4i 25x 2 H 37 41 50 3R 2 P type 5R 4 12 Pure Si at 500 K has equal number of electron n and hole nn concentration of 1 7 x 10 5 m On doping with boron hole concentration n increases to 4 7 x 102 m The doped semiconductor is of 1 N type 2 with electron no 3 5 x 1012 m ne 6 14 x 10 m 3 with electron 3 N type with electron ne 8 2 x 10 m 4 P type with electron ne 2 89 x 10 0 ma concentration concentration concentration concentration