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.
-
Question 721:
The diagram above shows the velocity-time graph of a vehicle. Its acceleration and retardation respectively are
Options:
A) 8.0 ms-2, 4,0 ms-2
B) 4.0 ms-2, 8.0 ms-2
C) 4.0 ms-2, 2.0 ms-2
D) 2.0 ms-2, 4.0 ms-2
Show Answer
The correct answer is C .
-
Question 722: The speed of light in air is 3 x 108ms-1. What is the speed in glass with a refractive index of 1.50?
Options:
A) 1.5 x 108ms-1
B) 3.0 x 108ms-1
C) 2.0 x 108ms-1
D) 6.0 x 108ms-1
Show Answer
The correct answer is C .
-
Question 723: Calculate the angle of minimum deviation of a 60o prism of a refractive index [sin-10.75 = 49o]
Options:
A) 38.00o
B) 19.47o
C) 16.25o
D) 49o
Show Answer
The correct answer is A .
-
Question 724: Which of the following statements are true about the spring balance and the chemical balance? i. both are used to measure the mass of an object. ii. either of them may be used to measure the weight of an object. iii. the spring balance works on the principle of Hooke's law while the chemical balance works on the principle of moments. iv. a change in gravity does the readings of a spring balance but not that of a chemical balance.
Options:
A) i, and iv
B) ii and iii
C) ii and iv
D) i, ii and iii
E) i and iii
Show Answer
The correct answer is C .
-
Question 725:
A given mass of gas has a pressure of 80 Nm at a temperature of 47 C. If the temperature is reduced to 27 C with volume remaining constant, the new pressure is?
Options:
A) 46.0 Nm
B) 75.0 Nm
C) 80.0 Nm
D) 85.3 Nm
Show Answer
The correct answer is B .
-
Question 726: If the stress on a wire is 107NM-2 and the wire is stretched from its original length of 10.00 cm to 10.05 cm. The young's modulus of the wire is
Options:
A) 5 . 0 x 104 Nm-2
B) 5 . 0 x 105 Nm-2
C) 2 . 0 x 108 Nm-2
D) 2 . 0 x 109 Nm-2
Show Answer
The correct answer is D .
-
Question 727: Lodestone is a natural magnet, it points at
Options:
A) N – W when suspended freely
B) N–S when suspended freely
C) S – E when suspended freely
D) S–W when suspended freely
Show Answer
The correct answer is B .
-
Question 728:
A body is acted upon by forces applied at points P and Q as shown above their resultant is equal to
Options:
A) 2√5N in adirection N 56° E
B) 2√5N in adirection N 56° W
C) 2√13N in adirection N 56◦ E
D) 2√13N in adirection N 56° W
E) √10N in adirection N 56° E
Show Answer
The correct answer is C .
-
Question 729: The principle of transmissibility of pressure in a fluid at rest in all directions is known as
Options:
A) Archimede's principle
B) Flotation Principle
C) Newton's lwa
D) Pascal's law
E) Boyle's law
Show Answer
The correct answer is D .
-
Question 730: A sonometer wire of length 100cm under a tension of 10N, has a frequency of 250Hz. Keeping the length of the wire constant, the tension is adjusted to produce a new frequency of 350Hz. The new tension is
Options:
A) 5.1N
B) 7.1N
C) 14.0N
D) 19.6N
Show Answer
The correct answer is D .