PERMUTATION-(E)-03-Answersheet

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 c c d a b d a d d a a d d d a b c a a a 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 b a c b c c a a a b b c b a c b a c c d 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 c d d b b b a c a a c a a b c c b a b b 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 c b a a c c a b b d c b a c a b b c d b 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 c a a c c b d b a a c a c c d b d a d c 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 b c c a d b b d a b a a a c b b a c b b 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 c d a b d a d b a c d c d a a b b d a a 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 d d b d c b a b c b b b b b b c a d b c 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 b a c b b c b a c c b d c a c c a c d a 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 a b a c c c b c c b b b b c b b b a a c 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 c a b c b d d b d b b d b a b b b b,c a b 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 c a b a c b a b d a b a d b b c b d c a 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 c b c a c c a c d d d a c d c a c a c d 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 a d d a b b a a d a b c b c b a

Comments

Post a Comment

Popular posts from this blog

PHYSICS-15-10- 11th (PQRS) SOLUTION

XI (PQRS) PHYSICS REVIEW TEST-5 Select the correct alternative. (Only one is correct) [15 × 3 = 45] There is NEGATIVE marking. 1 mark will be deducted for each wrong answer. Q.31 Two trains, which are moving along different tracks in opposite directions towards each other, are put on the same track due to a mistake. Their drivers, on noticing the mistake, start slowing down the trains when the trains are 300 m apart. Graphs given below show their velocities as function of time as the trains slow down. The separation between the trains when both have stopped, is: (A) 120 m (B) 280 m (C) 60 m (D*) 20 m 1 [Sol: x1 = 2 1 × 10 × 40 = 200 m; x2 = – 2 × 8 × 20 = –80 m  xreletive = x1 + x2 = 280  separation = 300 – 280 = 20 m (D) ] Q.32 One end of a thin uniform rod of length L and mass M is riveted to the centre of a uniform circular disc of radius r and mass 2 M so that the rod is normal to the disc. The centre of mass of the combination from the centre of the disc is at dist
Read more

8-Circular Motion

8.1 (D) The maximum angular speed of the hoop corresponds to the situation when the bead is just about to slide upwards. The free body diagram of the bead is For the bead not to slide upwards. m2 (r sin 45°) cos 45° – mg sin 45° < N (1) where N = mg cos 45° + m2 (r sin 45ยบ) sin 45° (2) From 1 and 2 we get.  = rad / s. 8.2 (C) Let v be the speed of particle at B, just when it is about to loose contact. From application of Newton's second law to the particle normal to the spherical surface. mv2 = mg sin  (1) r Applying conservation of energy as the block moves from A to B.. 1 mv2 = mg (r cos  – r sin ) (2) 2 Solving 1 and 2 we get 3 sin  = 2 cos  8.3 (A) As the mass is at the verge of slipping ∴ mg sin37 –  mg cos37 = m2r 6 – 8 = 4.5   = 3 16 8.4 (B) As when they collide vt  1  72v 2  2 2  25R   R = vt  t =   5R 6v Now angle covered by A =   vt R 11 Put t  angle covered by A = 6 8.5 (C) The acceleration vector s
Read more

4. THEORY-Current Electrictricity

CURRENT ELECTRICITY  1 . ELECTRIC CURRENT (a) Time rate of flow of charge through a cross sectional area is called Current. if q charge flows in time interval t then average current is given by q Iav = t and Instantaneous current i =. lim q  dq t0 t dt (b) Direction of current is along the direction of flow of positive charge or opposite to the direction of flow of negative charge. But the current is a scalar quantity. i i q+ velocity q– velocity SI unit of current is ampere and 1 Ampere = 1 coloumb/sec 1 coloumb/sec = 1A 2 . CONDUCTOR In some materials, the outer electrons of each atom or molecule are only weakly bound to it. These electrons are almost free to move throughout the body of the material and are called free electrons. They are also known as conduction electrons. When such a material is placed in an electric field, the free electrons drift in a direction opposite to the field. Such materials are called conductors. 3 . INSULATOR Another class o
Read more