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Physics

Physics
For Gamma radiation, what stops its penetrating abilities?

Concrete
Steal
All of these
Lead

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Physics
Proton carry a

Positive Charge
Neutral Charge
Variable Charge
Negative Charge

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Physics
Water is not suitable as a calorimetric substance because it :

Is a good conductor
Has high specific heat
Has high boiling point
Low latent heat of vapourization

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Physics
Which of the following has the highest frequency?

Cosmic rays
X-rays
Radio waves
Microwaves

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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
C1pa = C2pg
C2>C1
C1 = C2

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Physics
The light rays used for eliminating bacteria

Infrared rays
X-rays
Microwave radiation
Ultra-violet radiation

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