Physics

Q.

Tabulate the differences in the characteristics of states of matter -

Q.

Calculate the number of electrons constituting one coulomb of charge.

Q.

How does the water kept in an earthen pot (matka) become cool during summer?

Q.

What are 27 nakshatras?

Q.

What is the distance between Sun and earth?

Q.

During a thunderstorm, it is not safe to use mobile phones and cordless phones.

1. True
2. False

Q.

Write five uses of a convex mirror.

Q.

Who invented electricity?

Q.

How does the water keep in an earthen pot become cool during summer?

Q.

An electric bulb is rated $220V$ and $100W$. When it is operated on $110V$, what will be the power consumed?

Q.

Change the speed of 6m/s into km/h.

Q.

When will you say a body is in (i) uniform acceleration? (ii) non-uniform acceleration?

Q.

The radius of curvature of a spherical mirror is $20cm$. What is its focal length?

Q.

Why is Venus the hottest planet?

Q.

Name all the planets of the solar system in the order of their increasing distances from the sun.

Q.

On 1-04-2013 Jay and Vijay, entered into partnership for supplying laboratory equipment to government schools situated in remote and backward areas. They contributed capital of Rs 80, 000 and Rs 50, 000 respectively and agreed to share the profit in the ratio of 3:2. The partnership deed provided that interest on capital shall be allowed @9% per annum. During the year the firm earned a profit Rs 7, 800.

Showing your calculations clearly, prepare Profit and Loss Appropriation Account of Jay and Vijay for the year ended 31-3-2014.

Q. If a sprinter runs a distance of $100meters$ in $9.83seconds$, calculate his average speed in $km/h$.

Q.

What are natural things? Give examples for the same?

Q.

State the laws of refraction.

Q.

Question 5 (e)

Are there nine planets in the solar system? Justify!

Q.

In which medium sound travels fastest: air, water or steel?

Q. The CGS unit of specific heat capacity is:

1. $Jk{g}^{-1}{K}^{-1}$
2. $calk{g}^{-1}{K}^{-1}$
3. $kJk{g}^{-1}{}^{\circ }{C}^{-1}$
4. $cal{g}^{-1}{}^{\circ }{C}^{-1}$

Q.

Define charge.

Q.

What is the working principle of a capacitor?

Q.

What are the fundamental units?

Q.

What is meant by gravitational force (or force of gravity )? Give its one example.

Q.

A $4.5cm$ needle is placed at $12cm$ away from a convex mirror of a focal length of $15cm$ Give the location of the image and the magnification. Describe what happened as the needle is moved further from the mirror.

Q.

Explain Quantisation of charge

Q.

What is the relation between Alpha, Beta, and Gamma in Thermal Expansion?

Q.

Write the name of input and output devices and their features?