PHYSICS | Study Mode

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

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Correct option: B
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Question 2
A
Be a straight line
B
Curve inwards
C
Be a parabola
D
Curve outwards
Explanation

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Correct option: A
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Question 3
A
Temperature decreases
B
Slow evaporation
C
Temperature increases
D
Rapid evaporation
Explanation

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Correct option: D
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Question 4
A
\(\frac{g}{16}\)
B
\(\frac{g}{4}\)
C
\(\frac{4}{g}\)
D
\(\frac{16}{g}\)
Explanation
\(\frac{g}{R^2}\) = \(\frac{g}{4^2}\) = \(\frac{g}{16}\)

Correct option: A
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Question 5
A
I and II only
B
II and III only
C
I, II and III
D
I and III only
Explanation

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Correct option: D
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Question 6
A
Is quadrupled
B
Is halved
C
Remains the same
D
Is double
Explanation

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Correct option: D
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Question 7
A
80cm
B
40cm
C
50cm
D
70cm
Explanation

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Correct option: B
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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
Explanation

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Correct option: B
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Question 9
A
Prism binoculars
B
Telescope
C
Film projector
D
Microscope
Explanation

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Correct option: B
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Question 10
A
60
B
10
C
30
D
90
Explanation
M = \(\frac{y}{x}\) = \(\frac{30}{3}\)

= 10

Correct option: B

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