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Q:- An electrical power station has the power 200 megawatt(MW), then the electrical energy produced per day will be- 1. 200 MW-hour 2. 4800 MW-hou

at eqilibrium concentration of products and reac†an ts are same.then why their concentration graphs are not concurrent at eqilibrium?

What is pitch of a sound

79. Minimum number of 8 micro Faraday and 250 V capacitors are used to make a combination of 16 micro Faraday and 1000 V are

A wave transports energy and not matter. Justify this statement.

How are differnt sound notes generated in musical instruments like guitar, which uses strings for sound generation, and flute, which uses blown air for sound generation ?

Question 17.2 Can Paheli at B see the image of A reflected from the mirror?

Question 23We have two identical metal sheets. One of them is rubbed with sand paper and the other with ordinary paper. The one rubbed with sand paper shines more than the other. Give reason.

While testing an LED, it is advised not to close the circuit for a long time. The reason for this is:

What is SONAR ? How is it used to determine the depth of an ocean?

What is the electric field around an electric dipole?

X^3/2+X^-3/2=3 thenthe value of X^6+1/X^6=?

Due to vibration of particles of the medium _____.

a simpe pendulum performs simple harmonic motion about x=0 with an amplitudea and time period t. the speed of the pendulum at x=a/2will be

What are the advantages of pressure?

why carbon dioxide is in gas form and sulphur dioxide is in solid

When a charged object is brought near an uncharged object, it gets ___________. This process involves charging by ___________.

2000 cal of heat is supplied to 200 g of water. Find the rise in temperature. (Specific heat of water = 1 cal /g °c)

Two bodies of mass 5 kg and 3 kg respectively are connected to two ends of a light string passing over a frictionless pulley. The tension in the string is[g = 9.8 m/s2]

Question 10 Define rainwater harvesting. Explain how rainwater is collected and stored for various purposes? Will rainwater harvesting helps in replenishing groundwater? Explain.

In the given circuit ratio of charge on 2 μ F capacitor to the charge on 3 μ F capacitor will be??

If a child sitting on a slide does not slide down, it could be because of?

A thrust of 20 N is acting on an area of 2 m2. How much pressure is acting on the surface?

Find the product.(i) (5−2x)(3+x) (ii) (x+7y)(7x−y)(iii) (a2+b)(a+b2) (iv) (p2−q2)(2p+q)

Question 4The bulb does not glow in the setup shown in Fig. 14.10. List the possible reasons. Explain your Solution.

A force of 50 N is applied to a spring. What is the compression? (Take spring constant, k = 200 N/m)

device used to measure friction

9. The speed of sound in a perfectly rigid rod is (1) 332 m/s (2) Less than 332 m/s (3) Infinite (4) Zero

A particle is moving towards a convex mirror . The image also moves , If Vi=speed of image , Vo= speed of object, then find correct options (A) ViVo if |u|&gt;|F| (C) Vi|F| (D) Vi=Vo if |u|=|F| where F is focal length of convex mirror.?

What is the nuclear reaction?

Walking is not possible without ___________. Which of the following statements is correct, when a person walks on a rough surface?

In case of an earthquake, it is advised to get under a table. However, the table can also break if the roof of the house fells on it. So how is it helpful?

why is he focal length positive in case of a convex mirror ?

The angle between the normal and the incident ray is known as the:

Which of the following statements is correct about motion with constant velocity?

Question 12The figure shows two boys applying force on a box. If the magnitude of the force applied by each is equal, will the box experience any force of friction?

What do you mean by this statement : The refractive index of ice is 1.3

What is electrolysis

In a square pqrs if PQ is equal to( 2 X + 3 )cm and q are equal to( 3 x - 5 )cm then. ( a) x=4 (b)x=5 (c) x=6 (d) x=8

In the spring pendulum, in the place of mass liquid is used. If liquid leaks out continuously then time period of spring pendulum(1) Decreases continuously(2) Increases continuously(3 First increased and then decreased(4) First decreased then increased

A smooth block is released from rest on a 30^° incline and travels a dis†an ce d. If the time taken to slide on a rough 30^° inclined surface is n times large to cover the same dis†an ce on a smooth incline. Find the coefficient of friction

A ray of light is falling parallel to the principal axis on a convex mirror. Draw the path of the ray.

A drum vibrates with a lower frequency than a whistle. Therefore, it produces a _________ sound compared to the whistle.

A current of 2 A is flowing through a wire. The charge that would flow through the wire in 20 s will be​​​​​​​[0.77 Mark]

A spherometer has equal divisions marked along the periphery of its disc, and one full rotation of the disc advances by 0.0625 cm on the main scalev. What is the least count of spherometer

a liquid drop of mass m amd radius r is falling from great height . its velocity is proportional to ??in terms of m amd r

In a gold leaf electroscope, the degree of how much the gold leafs diverge is an indicator of:

You see your image in a plane mirror? State two characteristics of the image so formed.

When a charged object is brought near an uncharged object, it gets _. This process involves charging by _.

A particle is moving towards a convex mirror . The image also moves , If Vi=speed of image , Vo= speed of object, then find correct options (A) ViVo if |u|>|F| (C) Vi|F| (D) Vi=Vo if |u|=|F| where F is focal length of convex mirror.?

A current of 2 A is flowing through a wire. The charge that would flow through the wire in 20 s will be[0.77 Mark]