Question

Instructions:-
1. Answer all the questions choose the correct answer from the given options and
corresponding letter A/B/C/D in the space given.
ii. Each question carries one mark.
(A) 38°
C) 37°
1. Choose the correct mirror formula among the following.
(A) 1/f=1/v-1/4
(B) 1/f= 1/v +1/u
C) 1/u=1/f+ 1/v
(D) 1/f= 1/u-1/v
2. The geometric centre of the mirror is
(A) Pole
(B) focus
C) centre of curvature
(D) point of incidence
3. The characteristics of the image formed by convex mirror is
(A) real image
(B) same size as that of object
C) enlarged
(D) diminished
4. The normal temperature of human body in Celsius scale is
(B) 39°
(D) 98.4°
5. The lower and upper fixed scales of farm heat sale are
(A) 30,100
(B) 32,212
C) 35, 70
(D) 273, 373
6. The device which converts chemical energy into electrical energy is
(A) Battery
(B) fan
C) Electric motor
(D) dynamo
7. Which of the following is an insulator of electricity
(A) Copper
(B) Tungsten
C) Iron
(D) Mica
8. The material which has highest resistance value is
(A) Copper
(B) Tungsten
C) Iron
9. Which of the following does not depends on electromagnet
(D) Mica
(A) Fan
(B) Bulb
(D) Bell
C) Loud Speaker
10. Magnetic field due to current carrying solenoid resembles the magnetic field due t
(A) Straight wire carrying current
(B) ring carrying current
C) Bar Magnet
(D) Horse shoe Magnet
11. The law of octaves was given by
(A) Mendeleev
(B) Newlands
C) Lothar Meyer
(D) Dobereener
12. Among the third period elements the strong metal is
(AP
(B) AI
C) Na
(D) CI​

Answer 1

1) B) 1/f= 1/v +1/u

2) A) Pole

3) D) Diminished

4) D) 98.4°

5) A) 30100

6) A) Battery

7) A) Copper

8) B) Tungsten

9) A) Fan

10) C) Bar magnet

11) B) J.A.R Newlands

12) C) Na. Sodium

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