IMPORTANT QUESTIONS

1. Q41 In each of the following questions, a statement of Assertion (A) is given followed by a corresponding statement of Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below: Assertion (A): In a series circuit, the current is constant throughout the electric circuit. Reason (R): All electric devices need equal currents to operate properly.

   • (a) Both (A) and (R) are true and (R) is the correct explanation of (A).
   • (b) Both (A) and (R) are true but (R) is not the correct explanation of (A).
   • (c) (A) is true but (R) is false.
   • (d) (A) is false but (R) is true.

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2. Q42 Which of the following is not attracted by a magnet:

   • (a) Steel
   • (b) Cobalt
   • (c) Brass
   • (d) Nickel

   Easy View solution
3. Q43 On the basis of the case study and the related studied concepts. Rohan had a toothache and went to the dentist for investigations. After examining him, the doctor found a plaque on his teeth. The sticky, colorless or pale yellow film was deposited on his teeth due to the left food containing sugars etc on the teeth it might be due to improper cleaning of the teeth. The unhygienic conditions result in the formation of this layer and thus proper cleaning and maintenance of oral hygiene is necessary. Name the hardest material found in our body.

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4. Q44 Why are testes located outside the abdominal cavity?

   Medium View solution
5. Q45 List the properties of magnetic field lines?

   Hard View solution
6. Q46 List four essential components of an electric circuit and give the function of each.

   Hard View solution
7. Q47 Why is electromagnetic induction so called?

   Medium View solution
8. Q48 When is ovulation most likely to occur?

   • (a) About halfway between the start of one menstruation and the next.
   • (b) At the end of one menstruation.
   • (c) 1-5 days before the start of menstruation.
   • (d) 5-10 days after the start day of menstruation.

   Easy View solution
9. Q49 Find the average speed of a car which travels the first 30 km at a speed of 40 km/h and the remaining 20 km at a speed of 60 km/h?

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10. Q50 Define the phenomenon by which band of seven colors produced when a ray of light passes through a prism?

    Hard View solution