751. Two vectors AB and BC act on point B at right angles to each other. The magnitude of their resultant is 13 and the magnitude of BC is 12, the magnitude of AB is?
A. 24
B. 7
C. 5
D. 2
752. Which of the following is likely to be the rectangular force components of 10 Newton?
A. 6 and 8 Newton
B. 2 and 5 Newton
C. 3 and 5 Newton
D. None of these
753. The scalar product of two parallel vectors is of:
A. Maximum value
B. Minimum Value
C. Zero
D. Sum of vectors
754. The unit of Planck’s constant h is the same as that of:
A. Energy
B. Work
C. Linear Momentum
D. Angular Momentum
755. Which of the following quantities is dimensionless?
A. Gravitational constant
B. Plank’s Constant
C. Power of lens and gas constant
D. Steradian
756. The dimensions of the quantities in one of the following pairs are the same. Identify the pairs:
A. Torque and work
B. Angular Momentum and work
C. Energy and Young’s modulus
D. Light year and time
757. Which of the following is the smallest unit?
A. Millimeters
B. Angstrom
C. Fermi
D. Metre
758. If the unit of length, mass, and time each be doubled, the unit of work done is increased by:
A. 4 Times
B. 6 Times
C. 8 Times
D. 2 Times
759. The rate mistakes in the estimation of mass and speed are 3% and 4% separately. The following is the maximum measurement error for kinetic energy:
A. 11%
B. 10%
C. 8%
D. 9%
760. If the current flowing in a conductor changes by 1%, then power will change by:
A. 10%
B. 1%
C. 100%
D. 2%
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