Magnetic Effects of Electric Current Class X

1. List the properties of magnetic lines of force.
Ans. Properties of magnetic field lines of force as follows:
a. Outside a magnet, the field lines are directed from N-pole of magnet towards S-pole and inside the magnet lines are directed form S-pole to N-pole.
b. Magnetic field lines are closed curves.
c. No two magnetic field lines intersect each other’s.
d. Relative strength of magnetic field lines is given by degree of closeness of the filed lines

Control And coordination Class 10 Very important Questions

1.Mention one function for each of these hormones.
i) Thyroxine
ii) Insulin
iii) Adrenaline
iv) Growth hormone
v) Testosterone.

Ans.(i) Thyroxin – Control overall metabolic rate of the body (carbohydrate, protein and fat metabolism
(ii) Insulin – Conversion of glucose to glycogen in liver and muscles, thus decreases blood glucose level.
(iii) Adrenalin – increases heart beat, blood pressure and blood glucose level.
(iv) Growth hormone – Body growth and development of bones.
(v) Testosterone – Development of male sex organ sand secondary sex characteristics like moustache, beard & voice