1. The radius of curvature of a convex mirror is 24 cm. What is its focal length ?
(24 cm, 6 cm, 12 cm, 3 cm)
Answer : 12 cm
$$f = \frac{R}{2}$$
$$= \frac{24}{2}$$
= 12
2. The magnetic field around a current carrying conductor AB is given in the figure. Based on Maxwell's right hand screw rule, find the direction of the current through the conductor ?
Answer : A to B
3. Which of the following figure represent the critical angle ?
Answer : Figure B
4. The order of various colours observed in the spectrum of sunlight is given below. Choose the correct order.
(a) Blue, Violet, Green, Red
(b) Violet, Blue, Yellow, Red
(c) Violet, Yellow, Blue, Green
(d) Green , Yellow, Orange , Blue
Answer : b) Violet. Blue,yellow, Red
5. Write any two products obtained while coal is distilled in the absence of air.
Answer : Coal gas, Ammonia
(24 cm, 6 cm, 12 cm, 3 cm)
Answer : 12 cm
$$f = \frac{R}{2}$$
$$= \frac{24}{2}$$
= 12
2. The magnetic field around a current carrying conductor AB is given in the figure. Based on Maxwell's right hand screw rule, find the direction of the current through the conductor ?
Answer : A to B
3. Which of the following figure represent the critical angle ?
4. The order of various colours observed in the spectrum of sunlight is given below. Choose the correct order.
(a) Blue, Violet, Green, Red
(b) Violet, Blue, Yellow, Red
(c) Violet, Yellow, Blue, Green
(d) Green , Yellow, Orange , Blue
Answer : b) Violet. Blue,yellow, Red
5. Write any two products obtained while coal is distilled in the absence of air.
Answer : Coal gas, Ammonia
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