Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.
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Question 161: An astronomical telescope is said to be in normal adjustment when the
Options:
A) eye is accommodated
B) focal length of objective lens is longer than that of eye piece
C) final image is at the near point of eye
D) final image is at infinity
Show Answer
The correct answer is D .
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Question 162:
I. Total internal reflection of light.
II. Conservation of light energy.
III. Relative motion of the earth, sun and moon.
IV. Rectilinear propation of light.
Which of the above is a phenomenon of total solar eclipse?
Options:
A) I and IV only
B) II and IV only
C) I and III only
D) III and IV only
Show Answer
The correct answer is D .
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Question 163: A metre rule is pivoted at its mid-point with a vertical force of 10N hanging from the distance 30cm from the mid-point. At what distance must a 15N force hang to balance the ruler horizontally?
Options:
A) 30cm
B) 10cm
C) 20cm
D) 25m
Show Answer
The correct answer is C .
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Question 164: When taking a penalty kick, a footballer applies a force of 30.0N for a period of 0.05s. if the mass of the ball is 0.075kg, calculate the speed with which the ball moves off.
Options:
A) 4.50ms-1
B) 11.25ms-1
C) 20.00ms-1
D) 45.00ms-1
Show Answer
The correct answer is C .
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Question 165: A body of mass 2kg moving vertically upwards has its velocity increased uniformly from 10ms-1 to 40ms-1 in 4s. Neglecting air resistance, calculate the upward vertical force acting on the body.[g = 10 ms-1]
Options:
A) 15N
B) 20N
C) 35N
D) 45N
Show Answer
The correct answer is C .
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Question 166:
Which process is responsible for production of energy in stars?
Options:
A) Nuclear reaction
B) Nuclear fission
C) Nuclear fusion
D) Radioactive decay
Show Answer
The correct answer is C .
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Question 167:
An object is placed 35 cm away from a convex mirror with a focal length of magnitude 15 cm. What is the location of the image?
Options:
A) 26.25 cm behind the mirror
B) 10.5 cm behind the mirror
C) 26.25 cm in front of the mirror
D) 10.5 cm in front of the mirror
Show Answer
The correct answer is A .
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Question 168: Which of the following types of motion are oscillatory? i.a diving board when used by a diver. ii. the motion of the balance wheel of a wrist watch. iii. the motion of the turn-table of a record player. iv. the motion of the center of a ten kobo piece as it rolls down an inclined plane. v. the motion of the needle of a D.C. ammeter into which a low A.C. current is passed
Options:
A) i and ii
B) i, ii and iii
C) ii, ii and iv
D) i, ii and v
E) iii, iv and iv
Show Answer
The correct answer is A .
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Question 169:
A 400 N box is being pushed across a level floor at a constant speed by a force P of 100 N at an angle of 30.0° to the horizontal, as shown in the the diagram below. What is the coefficient of kinetic friction between the box and the floor?
Options:
A) 0.19
B) 0.24
C) 0.40
D) 0.22
Show Answer
The correct answer is A .
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Question 170:
The pressure of two moles of an ideal gas at a temperature of 27oC and volume 10-2m3 is
[R = 8.313 J mol-1K-1]
Options:
A) 4.99 x 105 Nm-2
B) 9.80 x 103 Nm-2
C) 4.98 x 103 Nm-2
D) 9.80 x 105 Nm-2
Show Answer
The correct answer is A .