A. only even harmonics are present
B. only odd harmonics are present
C. both even and odd harmonics are present
D. selected harmonics are present
A. 1.44kw/m2
B. 1.4kw/m2
C. 1 kw/m2
D. none
A. N=Noe-λt
B. N=Noeλt
C. N=Noe-λt/2
D. No=N(1+eλt)
A. 32Ω
B. 62Ω
C. 50Ω
D. 100Ω
A. Mercury takes a long time to contract
B. The amount of mercury use is very small
C. The capillary tube has a small constriction near the bulb
D. The capillary tube is very narrow
A. they fall with that ultimate velocity, which are different for different droplets
B. they fall with same ultimate velocity
C. their velocity increases and they fall with different velocity on the earth
D. their velocity increases and they fall with same velocity on the earth
A. 40
B. 15.5
C. 542
D. 273