281 The unit vector in the direction of vector A = 2 i^ -2j^ + k^ is_______________? Physics Medium Full question → A 2i^ – 2j^ + k^ B (2i^ – 2j^ +k^)/9 C (2i^ – 2j^ +k^)/3 D (2i^ – 2j^ +k^)/5
282 The cross product i^ x j^ is equal to_______________? Physics Medium Full question → A Zero B One C i^ D k^
283 It is easier to turn a steering wheel with both hands than with a single hand because______________? Physics Medium Full question → A Accelerating force increases on the wheel B Two forces act on the wheel C Two hands provide a firm grip D The couple acts on the wheel
284 Which of the following pairs does not have identical dimensions ? Physics Medium Full question → A Torque and energy B Momentum and impulse C Energy and work D Mass and moment of inertia
285 Three coplanar forces acting on a body keep it in equilibrium. They should therefore be_______________? Physics Medium Full question → A Concurrent B Non-concurrent C Parallel D Non-parallel
286 The resultant of two forces of equal magnitudes is also equal to the magnitude of the forces. The angle between the two forces is________________? Physics Medium Full question → A 30° B 60° C 90° D 120°
287 Which one is not correct for a vector A= 2i+2j+3k ? Physics Medium Full question → A Has direction 45° with an x-axis B Has magnitude 2 C Has magnitude 2 and direction °=45° with a y-axis D Has magnitude -2
288 Maximum number of components of a vector may be________________? Physics Medium Full question → A 1 B 2 C 3 D Infinite
289 Cosθi^ + Sinθj^ is a_________________? Physics Medium Full question → A Vector B Position Vector C Vector in the direction at angle θ with an x-axis D The unit vector in the direction at angle θ with an x-axis
290 Maximum number of rectangular components are_____________? Physics Medium Full question → A 1 B 2 C 3 D 4
291 The rectangular coordinate system is also called______________? Physics Medium Full question → A Polar coordinate system B Cartesian coordinate system C Cylindrical coordinate system D Spherical coordinate system
292 Unit vector n^ is along______________? Physics Medium Full question → A X-axis B Normal on a surface C Y-axis D Z-axis
293 A vector can be multiplied by a number. The number may be_______________? Physics Medium Full question → A Dimensionless B Dimensional scalar C Negative D All A, B and C are correct
294 The direction of a vector in space is specified by_______________? Physics Medium Full question → A One angle B Two angle C Three angle D No angle
295 Addition of vector obeys_____________? Physics Medium Full question → A Commutative law B Distributive law C Associative law D All given laws in A, B and C
296 An inductor may store energy in ________________? Physics Medium Full question → A Its electric field B Its coils C Its magnetic field D Both electric and magnetic fields
297 Two identical coaxial circular loops carry equal currents in the same direction. If the loops approach each other the current in______________? Physics Medium Full question → A Each increase B Each decrease C Each remains the same D One increases whereas that in the other decreases
298 A voltage V = V0 cos ωt is applied across a resistor of resistance R the average power dissipated per cycle in the resistor is given by___________? Physics Medium Full question → A V√/√2R B V/√2√R C V02/√2R D 2/√2√R
299 The phase angle between the voltage and the current in an AC circuit consisting of a resistance is______________? Physics Medium Full question → A Zero B 45° C 90° D 180°
300 Choose the correct statement. In the case of AC circuit ohms law holds for_______________? Physics Medium Full question → A Peak values of voltage and current B Effective values of voltage and current C Instantaneous values of voltage and current D All of the above