we know that
If the distance from a converging lens to the object is less than the focal length of the lens,
then
the object is located at a location in front of the focal point
see the attached figure to better understand the problem
So
The image will always be located somewhere on the same side of the lens as the object. For such a position, the image is magnified (the image dimensions are greater than the object dimensions) and upright (if the object is right side up, then the image will also be right side up), thus allowing for easier viewing and produce a virtual image
therefore
the answer is
The image will be Virtual, upright, and larger than the object
When silver is poured into the mould the it will solidify
In this process the phase of the Silver block will change from liquid to solid.
This phase change will lead to release in heat and this heat is known as latent heat of fusion.
The formula to find the latent heat of fusion is given as
here given that
now we can find the heat released
So it will release total heat of 55.5 kJ when it will solidify
Correct answers:
- Increasing the resistivity of the material the wire is composed of will increase the resistance of the wire.
- Decreasing the cross-sectional area of the wire will increase the resistance of the wire.
- Increasing the length of the wire will increase the resistance of the wire.
Explanation:
The resistance of a wire is given by:
where
is the resistitivity of the material
L is the length of the wire
A is the cross-sectional area of the wire
From the formula, we can notice that:
- The resistance (R) is directly proportional to both the resistivity () and the length of the wire (L), so when one of these quantities increases, the resistance will increase as well
- The resistance (R) is inversely proportional to the cross-sectional area (A), therefore when the resistance increases when the cross-sectional area decreases.
Based on these observations, the correct statements are:
- Increasing the resistivity of the material the wire is composed of will increase the resistance of the wire.
- Decreasing the cross-sectional area of the wire will increase the resistance of the wire.
- Increasing the length of the wire will increase the resistance of the wire.