AIEEE 2003 (Physics) Mock Test

The image formed by an objective of a compound microscope is:

The earth radiates in the infra-red region of the spectrum. The spectrum is correctly given by:

To get three images of a single object, one should have two plane mirrors at an angle of:

According to Newton’s law of cooling, the rate of cooling of a body is proportional to $(\Delta \theta {)}^n$, where $\Delta \theta$ is the difference of the temperature of the body and the surroundings, and $n$ is equal to:

The length of a given cylindrical wire is increased by $100\%$. Due to the consequent decrease in diameter, the percentage change in the resistance of the wire will be: