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Find the equivalent resistance between A &amp; B in the circuit given below.

A ball is thrown with velocity 40m/s at angle 30 degree from horizontal from top of a tower of heigth of 60m. at what horizontal distance from the foot of tower, the ball will strike the ground

If the numerical value of magnification is equal to 1, then

a car is moving with a velocity of 180 kmph antiques 6 seconds to stop after the brakes are applied .calculate the force exerted by the brakes if mass is 500 kgs

a stone is thrown upwards from ground such that its height from ground will be given by H=4t-5t^2 the maximum height attained is

If μ1 and μ2 are the refractive indices of the materials of core and cladding of an optical fibers respectively, then the loss of light due to its leakage can be minimised by having:

In term of potential difference V, electric current l, permittivity ε0, Permeability μ0 and speed of light c, the dimensionally correct relation is

Any thing suspended in space without any force acting on it (no gravity or something) will it possess any energy ? If yes how .. ​​​​​thanks

Two stones are thrown with same speed u at different angles from ground in air.if both stones have same range and height attained by them are h1 and h2 then h1+h2=

Assuming cons†an t retardation of a metal ball moving inside water, the ball loses 25% of its speed while travelling 35 cm in a straight line. How much further will it travel before stopping

Choose the ray diagram that shows the image formation for an object placed at the centre of curvature of a concave mirror.

If you are standing between 2 plane mirrors, inclined to each other at 60°. Then find number of images that you can see of yourself?

Vertices of a regular hexagon of side 3cm have threee positive and three negative charges, each of magnitude 1.5n/c. A point charge 5nc is placed at the centre of hexagon. Finf force on it.

Equal amount of pressure is applied on two surfaces with different surface areas. For such a condition, which of the following statement is correct?

In the given food chain, if grass disappears, what would be its immediate consequence?

What happens to the weight of the person when he is deep inside the earth?

An object of mass 40 kg is raised to a height of 5 m above the ground. What is its potential energy? If the object is allowed to fall, find its kinetic energy when it is half-way down. [3 MARKS]

The physical quantity which is the measure of the inertia of an object is ________.

9.A capacitor is connected to a cell of E having some internal resistance r.The potential difference across the a)cells < E b) cell is E c) capacitor is > E d) capacitor is < E

A bucket is raised from a well by means of a rope which is wound round a wheel of diameter 77 cm (Fig .15.78). Given that the bucket ascends in 1 minute 28 seconds with a uniform speed of 1.1 m/s. Calculate the number of complete revolutions the wheel makes in raising the bucket.

Why second law of motion called as real motion ? Explain with theory and proof it ?

Question 19Explain the working and application of a sonar.

20.A large vessel of height H , is filled with a liquid of density P , up to the brim . A small hole of radius r is made at the side vertical face , close to the base . What is the horizontal force required to stop the gushing of liquid?

An object weighs 50 N. Weight of water of volume equal to the volume of the object is 70 N. Find out the relative density (ρr) of the object.

Make a diagram to show how hypermetropia is corrected. The near point of a hypermetropic eye is 1m. What is the power of the lens required to correct this defect? Assume that near point of human eye is 25cm. [5 MARKS]

A bullet with initial velocity 150 m/s penetrates a rubber block of thickness 10 cm retarding at 30 m/s2 and then enters a wooden block that stops the bullet after a distance of 6 cm. What will be the retardation when the bullet enters the rubber block?

What is meant by scalar and be tired quantities?

When a potential difference across an electric bulb is 75 V, it draws a current of 3.5A. What will be the change in current drawn by the bulb, if the potential difference is increased to 80 V?

Can LPG be used in vehicles as a fuel instead of petrol or diesel?

Write the coordinates of a point which lies on the x-axis and is at a distance of 4 units to the right of the origin.

3.What is the meaning of the following: Space average velocity

Five electric fans of 120 watts each are used for 4 hours. Calculate the electrical energy consumed in kilowatt hours.

Why is the refractive index of atmosphere different at different altitudes?

A convergent beam is incident on concave mirror, what will be the nature of imag

Question 2Why are we looking at alternate sources of energy?

5. Velocity of a particle changes with position according to following curve . Acceleration of the particle at x=1m

The major constituents of an ecosystem are ____ and ____.

A U tube is partially filled with water . Oil which doesnot mix with water is next poured into one side , until water rises by 25cm onthe other side. If the density of the oil is 0.8 g/ cc , the level will s†an d higher than the level of water by (1) 6.25 cm (2) 12.50 cm (3) 18.75cm (4) 25.00c

Name the part which vibrates to produce sound in the following :(a) Drums(b) Sitar(c) Flute

What happens to the specific heat capacity of water, if the quantity of water increases?

What do we call, 'mass of a body per unit volume'?

Find total number of reflection between 2 mirror at angle 30 and light incident on one of the mirror at angle 60 from vertical

Question 19Meena draws magnetic field lines of field close to the axis of a current carrying circular loop. As she moves away from the centre of the circular loop she observes that the lines keep on diverging. How will you explain her observation?

The minimum distance between the object and the image formed by a concave mirror when the object is placed at C is equal to ___.

A farmer moves one round along the boundary of a square field of side 10 m in 40 seconds point what will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds from his initial position?

Specific resistance of a conductor increases with

The correct relation between Potential difference across the ends of the wire (V) and electric current through the wire (I) is:

the acceleration a of a particle in m/s2 is given by a =2t2+3t+5 where t is the time if the velocity of the particle at t=0 was 2m/s then calculate its velocity at t=3s

Two bodies A and B have masses M and m, respectively where M &gt; m and they are at a distance apart. Equal force is applied to each of them so that they approach each other. The position where they hit each other is

Find the equivalent resistance between A & B in the circuit given below.

Any thing suspended in space without any force acting on it (no gravity or something) will it possess any energy ? If yes how .. thanks

The major constituents of an ecosystem are and .

Two bodies A and B have masses M and m, respectively where M > m and they are at a distance apart. Equal force is applied to each of them so that they approach each other. The position where they hit each other is