Magnetic Effect of Current — Physics STD 10 — Question

Why is the earth terminal of a plug made (i) thicker, (ii) longer?

What happens to the position of an element in the periodic table when it
emits a (i) β -particle, and (ii) γ-radiation? Give reasons for your answer.

A body is acted upon by two forces, each of magnitude F, but in opposite directions. State the effect of the forces when
(a) Both forces act at the same point of the body.
(b) The two forces act at two different points of the body at a separation d.

What are the factors on which the quantity of heat given to a body depends?

(a) At what voltage is current available in our household?
(b) How is the magnetic field due to a straight current carrying wire affected if current in the wire is decreased?
(c) How is the magnetic field due to a straight current carrying wire affected if current in the wire is reversed?

How do you account for the fact that two strings can be used to give notes of the same pitch and loudness but of different quality?

A monochromatic ray of light passes from air to glass. The wavelength of light in air is λ, the speed of light in air is c and in glass is ν. If the absolute refractive index of glass is 1.5, write down (a) the relationship between 𝒸 and ν, (b) the wavelength of light in glass.

A mass of 200 g of mercury at 100°C is poured into water at 20°C. If the final temperature of the mixture is 25°C, find the mass of water. (Sp. heat cap. of mercury is 140 J/kgK).