521. A man sitting in a transport going toward a path from west to east with a speed of 40 km/h sees that the downpour – drops are falling upward down to the another man remaining on the ground. The downpour will show up:
A. To fall vertically down
B. To fall at a point going from west to east
C. To fall from east to west at an angle
D. The data given is deficient to choose the heading of downpour
522. Work is defined as the dot product of force and displacement but it is a:
A. Scalar quantity
B. Vector quantity
C. Constant quantity
D. None of these
523. The work done in a gravitational field is independent of:
A. Its distance
B. Its mass
C. Its path
D. Its potential energy
524. The work done by the body is maximum when it has an angle of:
A. 30 Degree
B. 60 Degree
C. 90 Degree
D. 0 Degree
525. Work done in a gravitational field along a closed loop is:
A. Maximum
B. Minimum
C. 1
D. Zero
526. Geothermal energy within the earth is generated by:
A. Radioactive decay
B. Residual heat of the earth
C. Compression of material
D. All
527. Which of the following is a conservative field:
A. Electrostatic field
B. Frictional field
C. Viscous field
D. All of these
528. The field in which the work done is independent of the path followed is called:
A. Conservative field
B. Non-Conservative field
C. Varying intensity field
D. None of these
529. A floppy disk in a computer rotates from rest to an angular speed of 31.4 rad/s in time 0.892s. What is the angular acceleration of the disk?
(A) 14.40 rad/s²
(B) 0.028 rad/s²
C) 35.20 rad/s²
(D) 56.70 rad/s²
530. When silicon is doped with a trivalent impurity, it is referred to as?
A) Acceptor atoms
(B) Donor atoms
(C) Neither A nor B
(D) Both A & B
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