Science
Vinita and Ahmed demonstrated a circuit that operates the two headlights and the two sidelights of a car, in their school exhibition. Based on their demonstrated circuit, answer the following questions.
(i) State what happens when switch A is connected to
(a) Position 2
(b) Position 3
(ii) Find the potential difference across each lamp when lit.
(iii) Calculate the current
(a) in each 12 Ω lamp when lit.
(b) In each 4 Ω lamp when lit.
OR
(iv) Show, with calculations, which type of lamp, 4.0 Ω or 12 Ω, has the higher power.
Related Questions
The below image shows a thin lens of focal length 5 m.
(i) What is the kind of lens shown in the above figure?
(ii) If a real inverted image is to be formed by this lens at a distance of 7 m from the optical centre, then show with calculation where should the object be placed?
(iii) Draw a neatly labelled diagram of the image formation mentioned in (ii).
A 10 cm long pencil is placed 5 cm in front of a concave mirror having a radius of curvature of 40 cm.
(i) Determine the position of the image formed by this mirror.
(ii) What is the size of the image?
(iii) Draw a ray diagram to show the formation of the image as mentioned in the part (i).
The table given below shows the hints given by the quiz master in a quiz.
S. No. HINT (i) Substance 'C' is used as a preservative. (ii) 'C' has two carbon atoms; 'C' is obtained by the reaction of 'A' in presence of alkaline Potassium permanganate followed by acidification. (iii) Misuse of 'A' in industries is prevented by adding Methanol, Benzene, and pyridine to 'A'. (iv) 'F' is formed on heating 'A' in presence of conc Sulphuric acid. (v) 'F' reacts with Hydrogen gas in presence of Nickel and Palladium catalyst. Based on the above hints answer the following questions
(a) Give the IUPAC names of A and F
(b) Illustrate with the help of chemical equations the changes taking place. (A ⟶ C and A ⟶ F)
OR
(b) Name the chemical reactions which occur in steps 2 and 5. Identify the compounds formed in these steps if 'A' is replaced with its next homologue.
Figures (a) to (d) given below represent the type of ear lobes present in a family consisting of 2 children – Rahul, Nisha and their parents.
Excited by his observation of different types of ear lobes present in his family, Rahul conducted a survey of the type of ear lobes found {Figure (e) and (f)} in his classmates. He found two types of ear lobes in his classmates as per the frequency given below:
Sex Free Attached Male 36 14 Female 31 19 On the basis of above data answer the following questions.
(a) Which of the two characteristics - 'free ear lobe' or 'attached ear lobe' appears to be dominant in this case? Why?
(b) Is the inheritance of the free ear lobe linked with sex of the individual? Give reason for your answer.
(c) What type of ear lobe is present in father, mother, Rahul and his sister Nisha? Write the genetic constitution of each of these family members which explains the inheritance of this character in this family?
(Gene for Free ear lobe is represented by F and gene for attached ear lobe is represented by f for writing the genetic constitution).
OR
(c) Suresh's parents have attached ear lobes. What type of ear lobe can be seen in Suresh and his sister Siya? Explain by giving the genetic composition of all.