491. Which is constant for a satellite in orbit?
A. Velocity
B. Kinetic energy
C. Angular momentum
D. Potential energy
492. The dynamic energy of a group of mass 2 kg and force of 2 Ns is:
A. 1 J
B. 2 J
C. 3 J
D. 4 J
493. If a body experiences a force that doubles its velocity, then:
A. Its acceleration is also doubled
B. Its momentum is also doubled
C. Its potential energy is also doubled
D. Its kinetic energy is also doubled
494. A light body A and a heavy body B have equal linear momentum. The K.E. of the body A then:
A. Is equal to that of B
B. Is greater than that of B
C. Is smaller than that of B
D. Is zero
495. The K.E. of a light and a weighty object are the same. Which object possesses more momentum?
A. Light object
B. Heavy object
C. Both have the same momentum
D. Data is not sufficient
496. When a ball of mass 20 kg falls from a height of 50 cm, its potential energy decreases as follows:
A. 968 J
B. 98 J
C. 1980 J
D. None of these
497. Uncertainty in position is only Δy = 1.5 × 10-11 m. Determine the minimum uncertainty in the momentum of the object (h = 6.63 × 10-34 Js)?
(A) 0.88 × 10-24 kg m/s
(B) 3.50 × 10-24 kg m/s
C) 7.00 × 10-24 kg m/s
(D) 1.75 × 10-24 kg m/s
498. A long solenoid has 10 turns/cm. If the current in the solenoid is 5A, what will be the magnetic field B inside the solenoid?
(A) 6.28 mT
(B) 10.00 mT
C) 62.80 mT
(D) 100.00 mT
499. What is the nature of binding of CH4?
A) Covalent
(B) Metallic
(C) Dipole
(D) Ionic
500. A lens of focal length 20 cm has a power of?
(A) 5.00 Diopters
(B) 10.00 Diopters
C) 50.00 Diopters
(D) 0.20 Diopters
Admin