# PHYSICS | Study Mode

Question 1
A
Concave Mirror
B
Concave lens
C
Prism
D
Convex lens
##### Explanation

Question 2
A
Be a straight line
B
Curve inwards
C
Be a parabola
D
Curve outwards
##### Explanation

Question 3
A
Temperature decreases
B
Slow evaporation
C
Temperature increases
D
Rapid evaporation
##### Explanation

Question 4
A
$$\frac{g}{16}$$
B
$$\frac{g}{4}$$
C
$$\frac{4}{g}$$
D
$$\frac{16}{g}$$
##### Explanation
$$\frac{g}{R^2}$$ = $$\frac{g}{4^2}$$ = $$\frac{g}{16}$$

Question 5
A
I and II only
B
II and III only
C
I, II and III
D
I and III only

Question 6
A
B
Is halved
C
Remains the same
D
Is double

Question 7
A
80cm
B
40cm
C
50cm
D
70cm
##### Explanation

Question 8
A
Efficiency of a machine is always greater than I
B
Efficiency decreases with an increase in friction
C
Velocity ratio depends on friction
D
Mechanical advantage increases with an increase in friction

Question 9
A
Prism binoculars
B
Telescope
C
Film projector
D
Microscope

Question 10
A
60
B
10
C
30
D
90
##### Explanation
M = $$\frac{y}{x}$$ = $$\frac{30}{3}$$

= 10

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