[{"id":158528,"question":"If the sum of two unit vectors is a unit vector the the magnitude of their difference is","choices":[{"text":"√2","value":"A"},{"text":"√3","value":"B"},{"text":"1","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":158527,"question":"The vector k = [0,0,1] is called unit vector along:","choices":[{"text":"x -axis","value":"A"},{"text":"y - axis","value":"B"},{"text":"z- axis","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":158526,"question":"Vector<u> i</u> =","choices":[{"text":"[1,0]","value":"A"},{"text":"[0,1,0]","value":"B"},{"text":"[0,0,1]","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":158525,"question":"The vector i = [1,0] is called unit vector along:","choices":[{"text":"x-axis","value":"A"},{"text":"y - axis","value":"B"},{"text":"z- axis","value":"C"},{"text":"Botha a and y-axis","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":158524,"question":"<u style=\"font-style: italic;\">O (</u>0,0<u style=\"font-style: italic;\">)</u>is called:","choices":[{"text":"Position vector","value":"A"},{"text":"Free vector","value":"B"},{"text":"Unite vector","value":"C"},{"text":"Null vector","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":158523,"question":"Vector additon is:","choices":[{"text":"Commutative","value":"A"},{"text":"Associative","value":"B"},{"text":"Commutative and Associative","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":158522,"question":"The positive real number which is the measure of the length of a vector is called the","choices":[{"text":"Unit vector","value":"A"},{"text":"Modulus","value":"B"},{"text":"Inverse","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":158521,"question":"If|a| =|b| = |a+b|=1, then|a-b| is equal to:","choices":[{"text":"1","value":"A"},{"text":"√3","value":"B"},{"text":"√2","value":"C"},{"text":"7","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":158520,"question":"If|a| =|b|=|a + b|=1, then|a+ b| = 5, then|a-b| =","choices":[{"text":"4","value":"A"},{"text":"6","value":"B"},{"text":"5","value":"C"},{"text":"3","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":158519,"question":"If a = 2i +2j, b= 3i -j and c=4i +5j, the 3b -a-2c =","choices":[{"text":"-i -15j","value":"A"},{"text":"i-15j","value":"B"},{"text":"i-3j","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1}]