Saturday, 9 September 2017
Class 10 - Physics - Light and Reflection - Magnification Chart For Mirrors (#cbseNotes)
Light and Reflection -
Magnification Chart For Mirrors
Q: What is Magnification?
Answer: The ratio of height of image to the height of an object is known as magnification of an image and is denoted as m.
Image height h' -v
m = -------------------- = ---- = ----
Object height h u
The +ve value of magnification represents virtual image of an object.
The -ve value of magnification represents real image of an object.
Q: Using magnification formula, prove that image formed by a plane mirror is at the same distance as object but behind the mirror. It is given that in plane mirror, object height and image height are equal.
Friday, 8 September 2017
CBSE Class 8 - Computers - Half Yearly Question Paper (2017-18) (#cbsePapers)
CBSE Class 8 - Computers - Half Yearly Question Paper (2017-18)
Chapters covered are:1. HTML designing
2. MS Word - Mail Merge
3. MS Access
CBSE Class 7 - Maths - Chapter 2 - Decimals - Multiplication and Division (Worksheet) (#cbseNotes)
Chapter 2 - Decimals - Multiplication and Division (Worksheet)
Multiplying Decimals
Q1. Multiply the decimals.
⑴ 4.4 ✕ 4.6
⑵ 9.06 ✕ 54
⑶ 4.23 ✕ 2.41
⑷ 8.13 ✕ 3.6
Q2. Solve:
⑴ ____ ✕ 53.99 = 539.9
⑵ 87.13 ✕ ____ = 87130
⑶ 10 ✕ _____ = 913
⑷ _____ ✕ 1000 = 85300
⑸ 88.233 ✕ 100 = _____
Q3. Convert to fractions and multiply.
⑴ 87.0 ✕ 5.2
⑵ 34.10 ✕ 70.20
CBSE Class 10 - Light - Reflection From Mirrors (Worksheet) (#cbseNotes)
Light - Reflection From Mirrors (Worksheet)
1. We get a diminished image with a concave mirror when the object is placed ____.
2. The drivers mirror used in automobiles is ____.
3. The distance of focus F from the pole P is termed as the ..................... of the mirror.
4. Mirror formula is ____.
Thursday, 7 September 2017
CBSE Class 11 - Business Studies - Chapter 4 - Business Services - Features Of Service (#cbseNotes)
Business Services - FEATURES OF SERVICES
Business services are essential and indispensable to the smooth flow of trade and industry.
Examples of business services are:
- Banking
- Insurance
- Transport
- Warehousing
- Communication
Types Of Services
1. Social Services: Provided voluntarily to achieve certain goals e.g. health care and education services provided by NGOs.
2. Personal Services: Services which are experienced differently by different customers.
e.g. tourism, restaurants etc.
3. Business Services: Services used by business enterprises for the conduct of their activities.
e.g. Banking, Insurance, communication, warehousing and transportation.
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