INSTRUCTIONS :
8 Q.1 to Q.7 are one mark question. (Very short answer / MCQ)
8 Q.8 is two marks question, to be answered in about 30 words.
8 Q.9 & Q.10 are three marks questions, to be answered in about 50 words.
8 Q.11 & Q.12 are five marks questions, to be answered in about 70 words.
1. White light is composed of ____________ colours.
(1) six (2) eight (3) seven (4) none of these
2. An image that cannot be obtained on a screen is called ________ image.
(1) real (2) virtual (3) point (4) none of these
3. The amount of heat produced in a electric wire depends on its
(1) material (2) length (3) thickness (4) all of these
4. Electric bell uses __________.
(1) bar magnets (2) electromagnets (3) natural magnets (4) none of these
5. The sideways reversal of the image by plane mirror is called _______.
(1) lateral inversion (2) regular reflection (3) diffuse reflection (4) none of these
6. Give one use of a concave mirror.
7. Name the safety device used to protect from short circuit.
8. Draw the circuit diagram to represent the circuit shown in figure.
9. David is observing his image in a plane mirror. The distance between the mirror and his image is 4 m.
If he moves 1 m towards the mirror. What will be the distance between David and his image?
10. State any three characteristics of the image formed by a plane mirror.
11. State three differences between a convex mirror and a concave mirror.
12. Explain principle and working of electric bell ? Draw figure.
if you answer all the questions right and according to the instructions then I will make you the brainist promise
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Answer:
oo bhai isne to one exam ka question paper hi post kar dala
i think will can solve this problem