Q.

What are advantages of SI system?

Q.

What is the least count of a spring balance?

Q. The pitch of a screw gauge is $0.5\text{mm}$ and there are $50$ divisions on its circular scale. The screw gauge has the least count of

1. $0.05\text{mm}$
2. $0.25\text{mm}$
3. $0.01\text{mm}$
4. $0.001\text{mm}$

Q. In a screw gauge, the main scale division is $1\text{mm}$ and there are $100$ divisions on circular scale. The least count of screw gauge is (Pitch $=1\text{mm}$)

1. $0.01\text{mm}$
2. $0.1\text{mm}$
3. $0.02\text{mm}$
4. $0.2\text{mm}$

Q. In compound microscope, the magnification is 95 to least distance of distinct vision and the distance of object from objective lens is (1/3.8) cm and focal length of objective is (1/4) cm. What is the magnification of eyepiece when final image is formed at least distance of distinct vision? A:5 B:10 C:100 D:none

Q. Two similar open organ pipes of length $50\text{cm}$ and $50.5\text{cm}$ produce $3\text{beats per second}$ when sounded together in fundamental nodes. The velocity of sound in air is

1. $303\text{m/s}$
2. $330\text{m/s}$
3. $151.5\text{m/s}$
4. $603\text{m/s}$

Q. If the screw on a screw-gauge is given six rotations, it moves by $3\text{mm}$ on the main scale. If there are $50$ divisions on the circular scale, the least count of the screw gauge is:

1. $0.001\text{cm}$
2. $0.02\text{cm}$
3. $0.01\text{cm}$
4. $0.002\text{cm}$

Q. Find out the approximate frequency at which maximum intensity is detected by observer O, if velocity of sound = $340m/s$ and frequency range of source is $2000Hz$ to $5000Hz$.

1. 3350 Hz
2. 4250 Hz
3. 2900 Hz
4. 3778 Hz

Q. A cube (density $0.5gm/cc$ of side $10cm$ is floating in water kept in a cylindrical beaker of base area $1500c{m}^2$. When a mass $m$ is kept on wooden block the level of water rises in the beaker by $2mm$. The mass $m$ is

1. $400gm$
2. $300gm$
3. $200gm$
4. $100gm$

Q. There are 20 divisions in 4cm of the main scale.The vernier scale has 20 divisions. The least count of the instrument is

Q.

What is the least count of a Microammeter?

Q. A tuning fork is vibrating at $250\text{Hz}.$ The length of the shortest closed organ pipe that will resonate with the tuning fork will be _________$\text{cm}$.

(Take speed of sound in air as $340{\text{ms}}^{-1}$)

Q.

The length and the radius of a cylinder measured with a slide callipers are found to be 4.54 cm and 1.75 em respectively. Calculate the volume of the cylinder.

Q.

The focal lengths of the objective and of the eye-piece of a compound microscope are f_o and f_e respectively. If L is the tube length and D is the least distance of distinct vision, then its angular magnification, when the image is formed at infinity, is

Q. what is Microscope what is its applications how it works on what is its principles

Q. Can we measure thickness of hair using screw gauge ?

Q. A hypothetical screw gauge has a pitch of $0.2\text{mm}$ and $10$ divisions on circular scale. The least count of screw gauge is

1. $0.1\text{mm}$
2. $0.02\text{mm}$
3. $0.5\text{mm}$
4. $0.06\text{mm}$

Q.

Our galaxy, the Milky Way, has a diameter of about $1\times {10}^{21}m$. The largest galaxy known to man, the $\mathrm{IC}1101$, has a diameter of $5\times {10}^{22}m$. The diameter of the $\mathrm{IC}1101$ is about how many times greater than the diameter of the Milky Way?

1. $5$

2. $5000$

3. $50$

4. $500$

Q.

The distance between the two consecutive threads of the screw of a screw gauge is 2 mm and the number of head scale divisions is $50$. What is the least count (in mm) ?

1. $0.04cm$

2. $0.4mm$

3. $0.04mm$

4. $4mm$

Q.

What is the difference between fundamental unit and fundamental quantity?

Q.

Rolling motion is

Q. How will you record your observation while measuring the volume of an irregular solid by the displacement method using a measuring cylinder ?

Q.

The thickness of a glass plate is measured to be 2.17 mm, 2.17 mm and 2.18 mm at three different places. Find the average thickness of the plate from this data.

Q.

The sun angular diameter is mesured to be 1920°.the distance d of the sun from the earth is 1.496×10^11 m . What is the diameter of the sun

Q. What is the relation between meter and fermi ?

Q.

Is it necessary that a measurement which is accurate must be precise or a measurement which is precise must be accurate?

Q. A screw gauge has the least count of $0.01\text{mm}$ and there are $\text{50}$ divisions in its circular scale. The pitch of the screw gauge is :

1. $0.5\text{mm}$
2. $1.0\text{mm}$
3. $0.01\text{mm}$
4. $0.15\text{mm}$

Q. Four particles of mass 5, 3, 2 and 4 kg are at the points (1, 6), (-1, 5), (2, -3) and (-1, -4) respectively. Find the coordinate of their centre of mass.

1. $(\frac{2}{7},\frac{23}{4})$
2. $(\frac{1}{7},\frac{23}{14})$
3. $(\frac{2}{7},\frac{11}{4})$
4. $(\frac{1}{7},\frac{23}{3})$

Q.

A graduated cylinder is a vessel used for measuring volumes of liquids in the laboratories .

1. True
2. False

Q.

Pressure applied on liquids is transmitted with undiminished force:

1. in downward direction only

2. upward direction only

3. sides of containing vessel

4. in all direction