Electrical energy is measured in:
A. watt
B. horse power
C. kilo watt
D. kilowatt hour
The resistance of a conductor at absolute zero (OK) is:
A. zero almost
B. infinite almost
C. no prediction at all
D. may increase or decrease
The graphical representation of Ohms law is:
A. hyperbola
B. ellipse
C. parabola
D. straight line
The blue colour of the sky is due to:
A. diffraction
B. reflection
C. polarization
D. scattering
In Young double slit experiment, if white light is used:
A. alternate dark and bright fringes will be seen
B. coloured fringes will be seen
C. no interference fringes will be seen
D. impossible to predict
Which one of the following is nearly monochromatic light:
A. light form fluorescent tube
B. light form neon lamp
C. light form sodium lamp
D. light form simple lamp
Longitudinal waves do not exhibit:
A. reflection
B. refraction
C. diffraction
D. polarization
Central spot of Newtons rings:
A. bright
B. dark for large wavelength
C. dark
D. bright for large wavelength
Light reaches the earth form sun in nearly:
A. 15 minutes
B. 10 minutes
C. 8 minutes
D. 8 minutes 30 seconds
Which is not optically active:
A. sugar
B. tartaric acid
C. water
D. sodium chlorate
