Physics
A parallel-plate capacitor of capacitance C1 is made using two gold plates. Another parallel-plate capacitor of capacitance C2 is made using two aluminium plates with same plate separation, and all the four plates are of same area. If rg and ra are respectively the electrical resistivities of gold and aluminium, then which one of the following relations is correct?

C1 = C2
C1>C2
C2>C1
C1pa = C2pg

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Physics
It is dangerous to observe Solar eclipse with naked eyes because

Ultraviolet radiations from Sun burn our retina
Cosmic rays reach eyes more during the eclipse
Infrared radiations from sun burn our retina
All radiations from sun initiate chemical reactions in eyes

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Physics
Circuit breaker usually operate under

Steady state of short-circuit current
After D. C. component has ceased
Transient state of short-circuit current
Sub-transient state of short-circuit current

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