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 331:
The diagram above shows a plank RS pivoted its center of gravity O and is in equilibrium with the weight P and Q. If a weight 2P is added to P the plank will be in equilibrium again by
Options:
A) moving Q nearer to O
B) moving P nearer to O
C) addding a weight Q to Q
D) moving P further away from O
Show Answer
The correct answer is B .
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Question 332: In a common emitter configuration, the output voltage is through the
Options:
A) Resistor
B) Base
C) Collector
D) Emitter
Show Answer
The correct answer is D .
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Question 333: Which of the following statements about radioactivity are true? i. alpha particle is positively charged ii. Beta particle is negatively charged iii. Gamma ray is neutral iv. Beta particle has the same mass as helium atom v. Gamma ray is charged
Options:
A) i, ii, iii and iv only
B) iv and v only
C) i, ii and iii only
D) i, ii and v only
E) all
Show Answer
The correct answer is C .
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Question 334: An electric heater with a p.d of 240 V connected across its terminals has a total resistance of 960Ω. find the power rating of the heater.
Options:
A) 0.25 W
B) 4.00 W
C) 38.40W
D) 60.00W
Show Answer
The correct answer is D .
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Question 335:
What is the resultant capacitance of the circuit?
Options:
A) 1.5µF
B) 18.0µF
C) 6.0µF
D) 6.8µF
E) 8.83µF
Show Answer
The correct answer is A .
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Question 336: The general gas law can be written as
Options:
A) PV ÷ T = a constant
B) PV = a constant
C) v/t = a constant
D) p/T = a constant
Show Answer
The correct answer is A .
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Question 337: Three cells each of e.m.f. 1.5v and an internal resistance of 1.0 are connected in parallel across a load resistance of 2.67. Calculate the current in the load?
Options:
A) 0.26A
B) 0.41A
C) 0.50A
D) 0.79A
Show Answer
The correct answer is C .
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Question 338: Which of the following is a property of steel?
Options:
A) it cannot retain its magnetism longer than iron
B) it can be used for making temporary magnets
C) it can be used for making permanent magnets
D) it can easily be magnetized and demagnetized
Show Answer
The correct answer is C .
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Question 339:
Which of the following statements is correct about the angle of dip at various points on Earth?
Options:
A) The angle of dip is zero at the equator and 90 degrees at the magnetic poles.
B) The angle of dip is greater at higher altitudes than at lower altitudes
C) The angle of dip is positive in the northern hemisphere and negative in the southern hemisphere.
D) The angle of dip is constant at all points on Earth
Show Answer
The correct answer is A .
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Question 340: An object placed on the principle axis of a convex lens of focal length 10m produces a real image of double magnification. The image distance from the lens is
Options:
A) 30cm
B) 25cm
C) 20cm
D) 15cm
E) 10cm
Show Answer
The correct answer is A .