In addition to the daughter nucleus and an electron or positron, the products of a beta decay
A. Neutrons
B. Neutrino
C. Alpha particle
D. Proton
Force 100N is applied on a wire produces extension 5mm in it. Energy stored in it is
A. 0.125 J
B. 0.250 J
C. 0.50 J
D. 1 J
The synopsis of Einstein’s equation E = mc² is that
A. The faster you move, the lighter you get
B. The faster you move, the heavier you get
C. The slower you move, the heavier you get
D. None of the above
A bird sitting on a high tension electric wire does not get electrocuted because:
A. Sit has high resistance
B. the body is earthed
C. it does not form a closed path for the flow of current
D. its feet are good insulators
Rainbow is seen after rain because of hanging molecules of water which act as __________?
A. Lens
B. Prism
C. Mirror
D. Slabs
To measure the speed of an approaching car a police officer shines?
A. light waves on it
B. microwaves on it
C. radio waves on it
D. ultra high frequency waves on it