A
B
C
D
Correct answer is D
No explanation has been provided for this answer.
A freshly demagnetized bar magnet is placed in the East-West direction to ensure that
the molecular magnets remain randomly arranged.
the molecular magnets are properly aligned
it is affected by the earth's magnetic field
the magnetic domains are within the earth's field
Correct answer is A
No explanation has been provided for this answer.
The diagram above represents an experimental set-up for verifying?
lens formula
refraction laws
reflection laws
mirror formula
Correct answer is A
the diagram above is an experimental set up for verifying lens formula
The vacuum in a thermoflask reduces heat loss resulting from
radiation only
conduction and convection only
radiation and convection only
conduction only
Correct answer is B
The vacuum of a thermos flask prevents heat loss by conduction and convection, conduction because vacuum is a poor conductor of heat, convention because
Which of the following cases cannot produce total internal reflection? A light ray travelling from
glass to water
kerosene to air
air to water
water to ice
Correct answer is C
No explanation has been provided for this answer.
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