781. The dimensions of Planck’s constant are equal to that of:
A. Energy
B. Momentum
C. Angular momentum
D. Power
782. The magnitude of (i×j) is equal to?
(A) 0
(B) i
C) k
(D) -k
783. The magnitude of i.(j×k) is equal to?
(A) 0
(B) i
C) 1
(D) -1
784. The dot product of vector A with itself results?
(A) Zero
(B) A
(C) 2A
D) A^2
785. The cross product of vector F with itself results?
(A) Zero
B) Null vector
(C) F
(D) F^2
786. Angle between two vectors 3i+4j and 4i-3j is?
(A) 0 Degree
(B) 30 Degree
(C) 45 Degree
D) 90 Degree
787. If a force of 10 N is acting along the x-axis, then its component along the y-axis is?
(A) 0 N
(B) 5 N
C) 10 N
(D) 15 N
788. Sum of two perpendicular forces 8 N and 6 N is?
(A) 2 N
(B) -2 N
C) 10 N
(D) 14 N
789. Force of 10 N makes an angle of 30 degrees with y-axis. Its x-component will be?
(A) 5 N
(B) 8.66 N
C) 10 N
(D) 10.14 N
790. Which of the following is the fundamental unit of angle in a plane in the SI system of units?
A. Omega
B. Degree
C. Radian
D. Hertz
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