261 What is the value of the current in a wire of 10cm long at the right angle to a uniform magnetic field of 0.5 Weber/m2 when the force acting on the wire is 5N ? Physics Medium Full question → A 1A B 10A C 100A D 1000A
262 Magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called____________________? Physics Medium Full question → A magnetic flux B magnetic field intensity C magnetic induction D self inductance
263 The net charge on n-type material is____________________? Physics Medium Full question → A Positive B Negative C Both positive and negative D Neutral
264 In a semiconductors the charge carriers are ___________________? Physics Medium Full question → A Holes only B Electrons only C Electron and holes both D All of the above
265 Holes can exist in____________________? Physics Medium Full question → A Conductors B Insulators C Semi conductors D All of the above
266 Many of the semi conductors are crystals of the type__________________? Physics Medium Full question → A Face centred cubic B Body centred cubic C Simple cubic D All of the above
267 The electrons in conduction band are free to___________________? Physics Medium Full question → A Transport vibrations B Transport signals C Transport charge D Transport impulses
268 A vacant or partially filled band is called _____________________? Physics Medium Full question → A Conduction band B Valence band C Forbidden band D Empty band
269 In simple cube one atom or molecule lies at its______________________? Physics Medium Full question → A Force corners B Nine corners C Eight corners D Six corners
270 The breaking of crystals along definite direction is called _____________________? Physics Medium Full question → A Cleavage B Symmetry C Isotropy D Homogeneity
271 The bulk properties of materials such as their mode of fracture can be related to their____________________? Physics Medium Full question → A Polymerization B Cleavage C Microstructure D Dislocation
272 Coercive force is the force which opposes ____________________? Physics Medium Full question → A Demagnetization B Breakage C Extension D Surface cracking
273 The curie temperature is that at which ____________________? Physics Medium Full question → A Semi-conductor becomes conductors B Ferromagnetic becomes paramagnetic C Paramagnetic becomes diamagnetic D Metals become super conductor
274 Any alteration produced in shapes length or volume when a body is subjected to some external force is called____________________? Physics Medium Full question → A Stiffness B Toughness C Extension D Deformation
275 A wire obeys Hooks law is of length 11 when it is in equilibrium under a tension F1. Its length becomes 12 when the tension is increased to F2. The energy stored in the wire during this process is____________________? Physics Medium Full question → A (F1+F2) (121+122) B (F1+F2) (122-112) C (F1+F2) (12-11) D (F1+F2) (12-11)
276 Materials that undergo plastic deformation before breaking are called __________________? Physics Medium Full question → A Brittle B Ductile C Amorphous D Polymers
277 A uniform steel wire of length 4m and area of cross-section 3×10-6m2 is extended by 1mm by the application of a force. If the youngs modulus of steel is 2×1011 Nm-2 the energy stored in the wire is___________________? Physics Medium Full question → A 0.025J B 0.50J C 0.75J D 0.100J
278 The magnitude of i^. (j^ x k^) is________________? Physics Medium Full question → A 0 B 1 C -1 D i^
279 In which quadrant, the only value of tan will be positive ? Physics Medium Full question → A First B Second C Third D Both 1st and 3rd
280 The cross product of two vectors is a negative vector when______________? Physics Medium Full question → A They are parallel vectors B They are anti parallel vectors C They are a perpendicular vector D They are rotated through 270°