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Do a circular conductor with 5 turns produces more magnetic field than that of a 3 turn circular conductor, when equal current is passed?

what is a magnetic flux

tell me in simple language with reference to electromagnetic induction

Which is better in AC and and DC current

The supply line has three wires: live, neutral and earth.

Telecom operators get revenue from transfer of data and voice. Average revenue received from transfer of each unit of data is called ARDT. In the diagram below, the revenue received from data transfer as percentage of total revenue received and the ARDT in US Dollars (USD) are given for various countries.

If the total revenue received is the same for the pairs of countries listed in the choices below, choose the pair that has approximately the same volume of data transfer.

I want notes for natural resources

What type of forces constitutes a couple?

To construct a ray diagram we use two rays of light which are so chosen that it is easy to determine their directions after reflection from the mirror. Choose these two rays and state the path of these rays after reflection from a concave mirror. Use these two rays to find the nature and position of the image of an object placed at a distance of 15 cm from a concave mirror of focal length 10 cm.

A steel scale measures the length of a copper wire as 80.0 cm, when both are at ${20}^{o}C$ (the calibration temperature for scale). What would be the scale read for the length of the wire when both are at ${40}^{o}C$? (Given ${\alpha }_{steel}=11;=17\times {10}^{-6}per{}^{o}C$)

An object a mass 1 kg is raised through a height `h’ from the ground. Its potential energy is increased by 1 J. Find the height `h’ .(take $g=9.8m/s^2$)

Statement 1 - Apparent position of the object keeps fluctuating when seen through a hot air.

Statement2 - Hotter air and cooler air have the same refractive index, so no dispersion happens.

A pin 3 cm long is placed at a distance of 24 cm from a convex lens of focal length 18 cm. The pin is placed perpendicular to the principal axis. Find the size and nature of the image.

What do you mean by transmission and distribution losses? How can they be reduced?

What is the term given for this kind of waste?

A convex lens of focal length $30cm$ is placed in contact with a concave lens of focal length $20cm$. What is the power of the combination of lens?

In order to obtain a magnification of, - 3 (minus 3) with a convex lens, the object should be placed : (a) between optical centre and F (b) between F and 2F (c) at 2F (d) beyond 2F

Which of the following are the uses of radioactivity?

How will you distinguish between a plane mirror, a concave mirror and a convex mirror without touching them ?

In a gear system, the gear ratio of the driving wheel A and driven wheel B is 10$:$ 1. To rotate the driven wheel B in the direction of driving wheel A, the driving wheel A is engaged with another wheel C. What should be the gear ratio of the wheels A and C?

Fauna of a region or a park refers to ___ .

A non-renewable source of energy is :
(a) wood (b) alcohol (c) hydrogen gas (d) natural gas

A diagram to show the energy changes in an oscillating simple pendulum is as follows:

The KE of the bob is the most when

The value of angle of deviation produced by a prism varies with an increase in the value of angle of incidence as follows:

A body of mass 1.50 kg is dropped from the 2nd floor of a building which is at a height of 12 m. The force acting on it during its fall? (g = 9.8 m s^-2)

A convex lens of focal length 15 cm produces a magnification of + 4. The object is placed : (a) at a distance of 15 cm (b) between 15 cm and 30 cm (c) at less than 15 cm (d) beyond 30 cm

For passengers flying at very high altitude, the sky appears dark. Why?

A rectangular tank of depth $8$ meter is full of water $n=4/3$, the bottom is seen at the depth:

Calculate the resistance of a metal wire of length 2m and area of cross-section $1.55\times {10}^{-6}{m}^2$ , if the resistivity of the metal be $2.8\times {10}^{-8}$ Ωm?

Question 28 (i)
$B_1,B_2$ and $B_3$ are three identical bulbs connected as shown in figure. When all the three bulbs glow, a current of 3A is recorded by the ammeter A.
(i) What happens to the glow of the other two bulbs when the bulb $B_1$ gets fused?

If lens I with focal length + 15 cm and lens II has focal length + 30 cm. find out which lens has more power.

If the radius of the earth shrinks by 4% and there is no change in its mass. By how much does the value of `g’ change?

What is resistance and resistivity

Which of the energies given below is not energy achieved from the sea

Question 8
Give one use each of a concave and a convex mirror.

Giving reasons, state the 'signs' (positive or negative) which can be given to the following : (a) object distance (u) for a concave mirror or convex mirror (b) image distances (v) for a concave mirror (c) image distances (v) for a convex mirror

A voltmeter consists of a 25 ft coil connected in series with a 575 ft resistor. The coil takes 10 mA for full scale deflection. What maximum potential difference can be measured on this voltmeter?

The value of escape velocity on earth when the body is thrown making an angle of 45^owith the horizontal is

One reaction which might be used for controlled nuclear fusion is shown ${}_3^{7}Li{+}_1^{2}H\to 2{(}_2^{4}He)+X$
What is particle X?

What is eV (electron-volt) a unit of ? How is it related to its S.I. unit?

Which of the following is not an example of a bio-mass energy source?

Two plane mirrors are placed parallel to each other. A man is standing at the mid-point of the distance between these two mirrors. Find the number of images formed. (Mirrors are kept symmetrically) [Distance between mirrors is 100 cm]