(A) virtual and upright

(B) virtual and inverted

(C) real and inverted

(D) real and upright

(A) nuclear fusion

(B) nuclear fission

(C) radioactivity

(D) artificial radioactivity

(A)  at an elevated position

(B) falling

(C) at rest

(D) moving

(A) 300 m

(B) 30 m

(C) 3 m

(D) 0.3 m

(A) microwave

(B) optical fiber

(C) radio wave

(D) all are operating at nearly the same propagation speed

(A) its velocity never changes

(B) its speed always changes

(C) its direction always changes

(D) its speed may or may not change

(A) air to glass

(B) air to water

(C) water to glass

(D) diamond to glass

(A) Angular momentum

(B) Linear Momentum

(C) Planck’s constant

(D) Energy

(A)  band rate

(B) band width

(C) data flow

(D) bit capacity

(A) 210 kN/mm2

(B) 100 kN/mm2

(C) 80 kN/mm2

(D) 10 kN/mm2