Physics Past Questions and Answers

The instantaneous value of the induced e.m.f as a function of time is ε = ε_o sin ωt where ε_o is the peak value of the e.m.f. The instantaneous value of the e.m.f., one quarter of the period is

During the nuclear reaction described by W → X→ Y

235	235	231
92	93	91

the particles emitted are respectively

from the diagram above, the inductive reactance and the resistance R are respectively

118.8cm² surface of the copper cathode of a voltameter is to be coated with 10^-6m thick copper of density 9 x 10³kgm^-3. How long will the process run with 10A constant current?
[3.3 x 10^-7kgC^-1]

A particle of weight 120N is placed on a plane inclined at 30⁰ to the horizontal. If the plane has an efficiency of 60% to the floor what is the force required to push the weight uniformly up the plane?