If A B And C Are Different Real Numbers And Aibjck Bicjak And Ciajbk Are Position Vectors
1) centroid of Δ ABC is a +b+c/3 (vector i + j + k) 2) (i + j + k... View Article
1) centroid of Δ ABC is a +b+c/3 (vector i + j + k) 2) (i + j + k... View Article
1) Right angled triangle 2) Isosceles triangle 3) Equilateral triangle 4) None of the above Answer: (1) Right triangle Solution:... View Article
1) –40 2) –20 3) 20 4) 40 Answer: (1) -40 Solution: Let, X, Y and Z denotes the position... View Article
1) ⅓ (i+2j+2k) 2) ⅓(i-2j-2k) 3) ⅓(i-2j+2k) 4) (i+2j+2k) Answer: (1) ⅓ (i+2j+2k) Solution: 3p+q−2r =3(i+j)+(4k−j)−2(i+k) = i+2j+2k
1) 0 2) a + b + c 3) (a+b+c)/3 4) (a-b-c)/3 Answer: (1) 0 Solution: Given, A, B, C... View Article
1) √2 2) 1 3) √5 4) √3 Answer: (4) √3 Solution: |a+b|=1 Squaring both sides, we get; |a+b|2 =... View Article
1) (-1/√2)i+(1/√2)k 2) (1/√2)i-(1/√2)k 3) (1/3√2)i+(4/3√2)j+(1/3√2)k 4) None of these Answer: (2) (1/√2)i-(1/√2)k Solution: Say, c = xi+yk |c| =... View Article
1) 5b – 4a 2) 5b + 4a 3) 4b – 5a 4) 4b + 5a Answer: (1) 5b-4a Solution:... View Article
1) π 2) 0 3) π/4 4) π/2 Answer: (1) π Solution: Given, a = 8b and c=-7b Suppose, vector... View Article
Answer: (1) \(\begin{array}{l}\hat{u}=\frac{\hat{a}+\hat{b}}{|\hat{a}+\hat{b}|}~ and ~M=(1+\hat{a} \cdot \hat{b})^{1 / 2}\end{array} \) Solution: Given, vector OP = âcos t + b sin... View Article
1) 1 2) 4 3) 3 4) no value of m for which vectors are coplanar Answer: (4) no value... View Article
1) 7i+2j-2k 2) -7i-2j+2k 3) 3i-j-k 4) -4i-3j+2k Answer: (1) 7i+2j-2k Solution: Since ABCDEF are the vertices of a regular... View Article
Dimethyl ether is highly volatile chemical which is toxic when inhaled. Vapours of dimethyl ether can cause irritation in eyes,... View Article
Zinc offers resistance against rusting and does not rust easily in water. To know about rust in a detailed and... View Article
Yes, the earth’s core is magnetic. Earth’s magnetism is generated by convection currents of molten iron and nickel in the... View Article
Acetic anhydride is banned because it is highly corrosive chemical which is extremely dangerou when in contact. It was used... View Article
Yes, gravity is a restoring force. To know about simple harmonic motion in a detailed and interesting way, subscribe BYJU’S!
Ionic bond is seen in magnesium oxide (MGO). To know about ionic bond in a detailed and interesting way, subscribe... View Article
Since sodium looses electrons, it is oxidized. To know about oxidation number in a detailed and interesting way, subscribe BYJU’S!
Germanium is slightly radioactive. Germanium 70, Germanium 72, Germanium 73, Germanium 74 and Germanium 76 are the most common isotopes.... View Article