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 531: In which of the following is surface tension important?
Options:
A) the floating of a ship in water
B) the floating of a dry needle in water
C) the floating of a baloon in air
D) the diffusion of sugar solution across a membrane
Show Answer
The correct answer is B .
-
Question 532:
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 .
-
Question 533: Two rays of light from a point below the surface of water are equally inclined to each other at 60o in water. What is the angle between the rays when they emerge into air? (Take the refractive index of water to be )
Options:
A) 41.8o
B) 44.1o
C) 60.0o
D) 83.6o
E) 120.0o
Show Answer
The correct answer is D .
-
Question 534: If a solid changes directly into a gas when heat is applied the process is called
Options:
A) vaporization
B) evaporation
C) sublimation
D) ionization
E) conversion
Show Answer
The correct answer is C .
-
Question 535: Three electric cells each of e.m.f 1.5V and internal resistance of 1.0 are connected in parallel across an external resistance of . Calculate the value of the current in the resistor
Options:
A) 0.5 A
B) 0.9A
C) 1.5A
D) 4.5A
Show Answer
The correct answer is C .
-
Question 536: A constant force of %n acts for a % seconds on a mass of 5kg initially at rest. Calculate the final momentum
Options:
A) 125kgms−1
B) 25kgms−1
C) 15kgms−1
D) 0kgms−1
Show Answer
The correct answer is B .
-
Question 537:
Fig 12 above shows the velocity time graph of a car which starts from rest and is accelerated uniformly at the rate of 3m sec-2 for 5 seconds. It attains a velocity which is maintained for a minute, The car is then brought to rest by a uniform retardation after another 3 seconds. calculate the total distance covered
Options:
A) 900m
B) 1920m
C) 960m
D) 860m
Show Answer
The correct answer is C .
-
Question 538: The function of a 5-A fuse included in a circuit supplying a household refrigerator with power is to keep the
Options:
A) Temperature of the refrigerator low and constant
B) keep current supplied to the refrigerator below 5A
C) Voltage supply constant
D) Current supplies to the refrigeration
Show Answer
The correct answer is B .
-
Question 539: A convex mirror is used as a driving mirror because i. its image is erect. ii. it has a large field of view. iii. it has a long focal length. Identify the CORRECT statement(s)
Options:
A) i andiii only
B) i and ii only
C) ii and iii only
D) i, ii, and iii only
E) i only
Show Answer
The correct answer is B .
-
Question 540:
An object 40 cm high is 30cm from the pin hole camera. If the height of the image formed is 20 cm. What is the distance of the image from the pin height?
Options:
A) 15 cm
B) 70 cm
C) 40 cm
D) 40 cm
Show Answer
The correct answer is A .