Apparent Depth

Q. a particle projected from ground passes 2 points which are 10m apart which are of height 12m and 18m above ground. Find minimum speed of projection

Q. 36. A cubical box of wood of side 30 cm weighing 21.6 kg floats on water with two faces horizontal the depth of immersion of box is

Q. 3. A light and a heavy body have equal momenta. Which one has greater K.E [AIIMS 1998; UPSEAT 2000; JIPMER 2001; Kerala PMT 2004] (a) The light body (c) The K.E. are equal (b) The heavy body (d) Data is incomplete

Q. A printed page is kept pressed by a glass cube ($\mu$ = 1.5) of edge 6.0 cm. By what amount will the printed letters appear to be shifted when viewed from the top?

1. 2.0 cm
2. 4.0 cm
3. 6.0 cm
4. 8.0 cm

Q. A printed page is kept pressed by a glass cube ($\mu$ = 1.5) of edge 6.0 cm. By what amount will the printed letters appear to be shifted when viewed from the top?

1. 2.0 cm
2. 4.0 cm
3. 6.0 cm
4. 8.0 cm

Q. To trace the image of a point object kept above water, in the water we will

1. Follow the point of meeting of rays of light after refraction
2. Follow the point of meeting of rays of light before refraction
3. Follow the rays of light before or after refraction
4. Can’t comment

Q. 29. A particle is projected with velocity 2\sqrt{}g\sqrt{}h such that it crosses two walls of height h separated by 2h .What is the angle of projection?

Q. A beaker containing liquid is placed on a table, underneath a microscope which can be moved along a vertical scale. The microscope is focussed, through the liquid onto a mark on the table when the reading on the scale is a. It is next focussed on the upper surface of the liquid and the reading is b. More liquid is added and the observations are repeated, the corresponding readings are c and d. The refractive index of the liquid is

1. $\frac{d-a}{d-c-b+a}$
2. $\frac{b-d}{d-c-b+a}$
3. $\frac{d-c-b+a}{d-b}$
4. $\frac{d-b}{a+-c-d}$

Q. A rectangular slab of refractive index $\mu$ is placed over another slab of refractive index 3, both slabs being identical in dimensions. If a coin is placed below the lower slab, for what value of $\mu$ will the coin appear to be placed at the interface between the slabs when viewed from the top

1. 1.8
2. 2
3. 1.5
4. 2.5

Q. A container has two layers of immiscible liquids $1$ and $2$ with refractive indices $1.5$ and $4/3$ respectively. What is apparent position of an object placed at the bottom of the vessel. Thickness of the layers are $3\text{cm}$ and $8\text{cm}$ respectively?

1. $6\text{cm}\text{below the liquid 2 - air interface.}$
2. $8\text{cm}\text{below the liquid 2 - air interface.}$
3. $8\text{cm}\text{below the liquid 1 - liquid 2 interface.}$
4. $6\text{cm}\text{below the water - air interface.}$

Q. A 2 cm diameter coin rests flat on the bottom of a bowl in which the water is 20 cm deep $(\mu =\frac{4}{3})$. If the coin is viewed directly from above, what is its apparent diameter?

1. 2 cm
2. 1.5 cm
3. 2.67 cm
4. 1.67 cm

Q. A glass slab $(\mu =1.5)$ of thickness $2\text{cm}$ is placed on a spot. The shift of spot if it is viewed from top will be

1. $\frac{5}{3}\text{cm}$
2. $\frac{4}{3}\text{cm}$
3. $\frac{2}{3}\text{cm}$
4. $\frac{7}{3}\text{cm}$

Q. A layer of benzene $(\mu =1.5)$ having thickness $12\text{cm}$ floats in a vessel on water layer $(\mu =4/3)$ having thickness $8\text{cm}$. When viewed from top obliquely, the apparent depth of the bottom of the vessel below the surface of benzene will be

Q. A cube has sides of length $l=0.2\text{m}$. It is placed with one corner at the origin as shown in figure. The electric field is uniform and given by $\overrightarrow{E}=(2.5\hat{i}-4.2\hat{j})\text{N/C}$. Find the electric flux through the entire cube.

1. Zero
2. $10{\text{N-m}}^2\text{/C}$
3. $15{\text{N-m}}^2\text{/C}$
4. $5{\text{N-m}}^2\text{/C}$