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(a) 1.275(b) 1.225(c) 1.8 (d) 1.5
2. The nature of parallel and anti-parallel currents isa) parallel current repels and antiparallel currents attract. b) parallel currents attract and antiparallel currents repel. c) both currents attract. d) both currents repel.Deselect Answer
3. At resonance frequency the impedance in series LCR circuit is(a) maximum(b) minimum (c) zero (d) infinityDeselect Answer
4. Work function of metal isa) minimum energy required to free an electron from surface against coulomb forces b) minimum energy required to free a nucleon c) maximum energy required to eject an electron from electronic orbit d) minimum energy to ionise an atomDeselect Answer
5. Which of the following electromagnetic radiations has the smallest wavelength?(a) Microwaves(b) Ultraviolet (c) X-rays(d) Gamma raysDeselect Answer
6. Which of the following motions is not simple harmonic?a) Vertical oscillations of a spring b) Motion of a simple pendulum c) Motion of planet around the sun d) Oscillation of liquid in a U-tubeDeselect Answer
7. During propagation of a plane progressive mechanical wave,a) All the particles are vibrating in the same phase. b) Amplitude of all the particles is equal. c) Particles of the medium executes SHM d) Wave velocity depends upon the nature of the medium.Deselect Answer
8. The magnitude of induced emf during electromagnetic induction, is directly proportional toa) electric flux b) rate of change of magnetic flux c) magnetic field d) electric fieldDeselect Answer
9. The value of 3.26×4.9 to the correct significant figure is(a) 16.0(b) 15.9 (c) 15.97 (d) 16.1Deselect Answer
10. The angular acceleration for a particle having angular displacement 𝜃=3𝑡3−9𝑡2is zero when t equals?(a) 2 s (b) 1 s (c) 5 s (d) 1/2 sDeselect Answer
11. Which of the following is dimensionless?a) Universal gas constant (R) b) Universal gravitational constant (G) c) Planck’s constant (h) d) Refractive index of a mediumDeselect Answer
12. If maximum tension of a string is 30 N and a mass of 4 kg is tied to its end against gravity, thena) the string will hold the mass b) the string will break c) the string will execute SHM d) noneDeselect Answer
13. Work done by a variable force is given byDeselect Answer
14. If e is the coefficient of restitution, then which the following is not truea) for elastic collision, e = 1 b) for perfectly elastic collision, e = 0 c) for inelastic collision, e > 1 d) all are trueDeselect Answer
15. 1 joule is equivalent to
(a) 105 erg(b) 106 erg(c) 107 erg(d) 108 erg
(a) 16(b) 0(c) 10(d) 24
17. The most stable nucleus should have(a) even number of protons and odd number of neutrons (b) odd number of neutrons and odd number of protons (c) even number of protons and even number of neutrons (d) even number of neutrons and odd number of protonsDeselect Answer
18. The radius of 4Be8 nucleus will be
(a) 1.2 × 10-15 m(b) 2.4 × 10-15 m(c) 3.6 × 10-15 m(d) 4.8 × 10-15 m
19. The nucleus nXm emits one and one The resulting nucleus isa) nXm-4 b) n-2Xm-4c) n-3Xm-4d) n-1Xm-4Deselect Answer