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 751:
Which of the following materials is a good insulator?
Options:
A) Silver
B) Water
C) Rubber
D) Copper
Show Answer
The correct answer is C .
-
Question 752:
The main factor which affects the speed of sound wave is the?
Options:
A) properties of the medium
B) amplitude of the sound wave
C) intensity of the sound wave
D) loudness of the sound wave
Show Answer
The correct answer is A .
-
Question 753: A 24V potential difference is applied across a parallel combination of four 6-ohms resistor, The current in each resistor is
Options:
A) 1A
B) 4A
C) 16A
D) 18A
E) 36A
Show Answer
The correct answer is B .
-
Question 754:
I. Force (N)
II.Torque (NM)
III. Current (A)
IV. Power (W)
Which of the above are the correct S. I: units of the quantities indicated?
Options:
A) I and II only
B) I and III only
C) I, II and III only
D) I, III and IV only
Show Answer
The correct answer is D .
-
Question 755: A person can focus objects when they lie beyond 75 cm from his eyes. The focal length of the lens required to reduce his least distance of distinct vision to 25 cm is?
Options:
A) 37.50 cm
B) 75.00 cm
C) 18.75
D) 25.00 cm
Show Answer
The correct answer is A .
-
Question 756: An ebonite rod rubbed with fur attracts a glass rod rubbed with silk because
Options:
A) ebonite has a negative charge while glass has a positive charge
B) ebonite has a positive charge while glass has a negative charge
C) both have negative charges
D) both have positive charges
Show Answer
The correct answer is A .
-
Question 757: Two liquids L1 and L2 are contained in a U - tube. The height and the density of L1 are 8 cm and 103 kgm-3 respectively. If the density of L2 is 800 kgm-3, its height measured from the same level is
Options:
A) 8 cm
B) 10 cm
C) 16 cm
D) 12 cm
Show Answer
The correct answer is B .
-
Question 758: Which of the following best describes the energy changes which take place when a steam engine drives a generator which lights a lamp?
Options:
A) heat light sound kinetic
B) kinetic light heat electricity
C) heat kinetic electricity heat light
D) electricity kinetic heat v light
E) heat sound kninetic v electricity
Show Answer
The correct answer is C .
-
Question 759:
The momentum of a car moving at a constant speed in a circular track
Options:
A) can be both positive and negative
B) can be zero depending on its position in the track
C) can be zero depending on its position in the track
D) a centrifugal
Show Answer
The correct answer is C .
-
Question 760: A car accelerates uniformly from rest at 3ms-2. its velocity after traveling a distance of 24m is
Options:
A) 12ms-1
B) 144ms-1
C) 72ms-1
D) 36ms-1
Show Answer
The correct answer is A .