Q1. Distant objects are visible as a little out of focus in this condition:
(a) presbiopia
(b) hypermetropia
(c) astigmatism
(d) myopia
Q2. S.I. unit of Magnetic flux is
(a) weber
(b) weber/m
(c) weber/m^4
(d) weber–m^2
Q3. Plank’s constant has the dimensions of:
(a) energy
(b) linear momentum
(c) angular momentum
(d) force
Q4. Which of these travels in glass with minimum velocity?
(a) red light
(b) violet light
(c) green light
(d) yellow light
(a) interference
(b) diffraction
(c) polarisation
(d) refraction
Q6. X-rays are discovered by..
(a) Wilhelm Conrad Roentgen
(b) Paul Villard
(c) Sir Isaac Newton
(d) None of these
Q7. The mercury and sodium street lamps light up because of:
(a) Atomic emission
(b) Atomic absorption
(c) Electron emission
(d) Electron absorption
Q8. Which of the following colour of light deviates least through the prism?
(a) yellow
(b) green
(c) violet
(d) red
Q9. Vehicles use __________ to see the objects coming from behind.
(a) Concave lens
(b) Convex lens
(c) Convex mirror
(d) Concave mirror
Q10. Optical fibre works on the principle of
(a) refraction
(c) interference
(d) total internal reflection
Q11. A particle is moving in a uniform circular motion with constant speed v along a circle of radius r. The acceleration-of the particle is
(a) zero
(b) V/r
(c) V/r^2
(d) V^2/r
Q12. Light year is a unit of
(a) Light
(b) Current
(c) Distance
(d) Time
Q13. The unit of noise pollution (level) is:
(a) decibel
(b) decimal
(c) ppm
(d) None of these
Q14. Tesla is a unit of magnetic:
(a) flux
(b) induction
(c) moment
(d) Magnatic field
Q15. Rocket works on the principle of
(a) Newton’s Third Law
(b) Newton’s First Law
(c) Newton’s Second Law
(d) Archimedes Principle
