Question

direction of magnetic fielu mes.
AI
26. What is a solenoid ? Mention two ways to increase the strength of the field of a solenoid
SECTION C
27. You are provided with 90 mL of distilled water and 10 mL of concentrated sulphuric aci
prepare dilute sulphuric acid.
(i) What is the correct way of preparing dilute sulphuric acid ? Give reason
(ii) How will the concentration of H2O + ions change on dilution?
28. What is a homologous series of carbon compounds? Give an example and list its
characteristics.
OR
What are covalent compounds ? How are they different from ionic compounds ? List an
properties of covalent compounds.
29. List in tabular form three distinguishing features between autotrophic nutrition and hetero
nutrition.
AT 30. A cross was made between pure breeding pea plants one with round and
seeds.
green seeds​

Answer 1

26) Solenoid is a type of electromagnet, the purpose of which is to generate a controlled magnetic field through a coil wound into a tightly packed helix. The coil can be arranged to produce a uniform magnetic field in a volume of space when an electric current is passed through it.

• The strength of the magnetic field around a solenoid can be increased by:
• increasing the number of turns on the coil.
• increasing the current.
• placing an iron core inside the solenoid.