Unit - 6.1 Natural And Artificial Magnets — PHYSICS STD 6 — Question

Where is the earth's magnetic field:
(i) strongest and (ii) weakest?

Solve the following numerical problem.
An aeroplane leaves Bengaluru at 23:50 hours and reaches Chennai at 00.40 hours. Rewrite the statement using a 12- hour time format. Also, find the duration of the flight.

Define the term “weight of a body”

Why do school bags have broad straps ?

Light energy

Write the names of some transparent objects.

Select the correct statement :
(a) A wheel barrow is a lever of class I.
(b) The efficiency of a machine is always 100%
(c) Friction in moving parts of a machine reduces its efficiency.
(d) No lever has the mechanical advantage greater than 1.
(e) It is easier to lift a load vertically up than to push it along an inclined plane.
(f) A screw is made by two inclined planes placed together.

write the correct statement :
The distance of the planets and stars from earth is measured in millimetres.

What are molecules?

When is work said to be done by a force?