Question

C.
d.
b. soft iron
it burns in oxygen with a dazzling white flame
it reacts with cold water to form magnesium oxide and evolves hydrogen gas
it reacts with hot water to form magnesium hydroxide and evolves hydrogen gas
Q3. The material of the core of a strong Electromagnet is
it reacts with steam to form magnesium hydroxide and evolves hydrogen gas
d. inversely proportional to r?
a.
b.
a. Steel
Q4. The magnetic field around a current carrying conductor is
d. brass
c. wrought iron
a. directly proportional to r
b. directly proportional to r?
05. The strength of the magnetic field of a solenoid does not depend upon
c. inversely proportional to r
a. current through it
b. core of the coil
Q6. Give two examples each of of the metals that are good conductor and poor conductors 0
d. area of the coil
respectively.
Q7. Generally when metals are treated with mineral acids, hydrogen gas is liberated but whe
metals (except Mn and Mg) are treated with HNO3, hydrogen is not liberated, Why?
28. Metals replace hydrogen from dilute acids, whereas non metals do not. why?
9. What is an electromagnet? Draw a circuit diagram to show how a soft iron piece can b
transformed into an electromagnet.
10. How does the strength of the Magnetic field at
c. number of turns of the coil​

Answer 1

Answer:

a

b

c

d

e

21

Explanation:

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to connect hogyq