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 401:
Each of the figures in the diagram above represent two current carrying conductors situated close to each other. In which two diagrams, are the forces between the two wires attractive
Options:
A) I and V
B) I and II
C) II and IV
D) II and V
E) III and IV
Show Answer
The correct answer is C .
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Question 402:
A force of 5N act at a point Y on a rod XYZ as shown in the diagram above, if XY is 2m. What is the moment of the force about point X?
Options:
A) 0Nm
B) 3Nm
C) 7Nm
D) 10Nm
Show Answer
The correct answer is A .
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Question 403:
A gas at a volume of V in a container at pressure p is compressed to one-fifth of its volume. What will be its pressure if the magnitude of its original temperature T is constant?
Options:
A)
B)
C) p
D) 5P
Show Answer
The correct answer is D .
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Question 404: Under what conditions are cathode rays produced in a discharge tube?
Options:
A) High pressure and low voltage
B) High pressure and high voltage
C) Low pressure and low voltage
D) Low pressure and high volatge
Show Answer
The correct answer is D .
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Question 405: A palm fruit dropped to the ground from the top of a tree 45m tall. How long does it take to reach the ground? (g = 10ms-2)
Options:
A) 9s
B) 4.5s
C) 6s
D) 7.5s
E) 3s
Show Answer
The correct answer is E .
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Question 406: A gramophone record takes 5s to reach its constant angular velocity of 4 rads-1 from rest. Find its constant angular acceleration.
Options:
A) 0.4 rads-2
B) 0.8 rads-2
C) 1.3 rads-2
D) 20.0 rads-2
Show Answer
The correct answer is B .
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Question 407: The colours seen on soap bubbles are due to
Options:
A) Diffraction
B) Refraction
C) Dispersion
D) Interference
Show Answer
The correct answer is D .
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Question 408: A weightless vessel of dimensions 4m x 3m x 2m is filled with a liquid of density 1000kgm-3 and sealed. What is the maximum pressure this container can exert on a flat surface? [g = 10ms-2]
Options:
A) 9 x 104NM-2
B) 4 x 104NM-2
C) 3 x 104NM-2
D) 2 x 104NM-2
Show Answer
The correct answer is D .
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Question 409: 250g of lead at 170oC is dropped into 100g of water at 0oC. If the final temperature is 12oC, the specific heat of lead is (specific heat of water is 4,200J/kgoC)
Options:
A) 39.5J/kgoC
B) 50.4J/kgoC
C) 127.6J/kgoC
D) 154.6J/kgoC
E) 173.4J/kgoC
Show Answer
The correct answer is C .
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Question 410: An electric cell has an internal resistance of 2 ohms. A current of 0.5A is found to flow when a resistor of 5 ohms resistance is connected across it. What is the electromotive force of the cell?
Options:
A) 5 volts
B) 3.5 volts
C) 2.5 volts
D) 1 volts
E) 10 volts
Show Answer
The correct answer is B .