The potential energy of a system increases if work is done
The potential energy of a system increases if work is done
Options
(a) upon the system by a non conservative force (b) by the system against a conservative force (c) by the system […]
Easy
Which one of the following is not a unit of young’s modulus?
Which one of the following is not a unit of young’s modulus?
Options
(a) Nm⁻¹ (b) Nm⁻² (c) Dyne cm⁻² (d) Mega pascal
Correct Answer:
Nm⁻¹
Explanation:
No explanation available. Be the first […]
IF A⃗ and B⃗ are two vectors and θ is the angle between them
If A and B are two vectors and θ is the angle between them, if (A x B) = √3 (A. B), the value of θ is
Options
(a) 45° (b) 30° (c) 90° […]
The quantity having the same units in all systems of unit is
The quantity having the same units in all systems of unit is
Options
(a) mass (b) time (c) length (d) temperature
Correct Answer:
time
Explanation:
In FPS and MKS and SI system, […]
Given A=4i+6j and B=2i+3j. Which of the following is correct?
Given A=4i+6j and B=2i+3j. Which of the following is correct?
Options
(a) A x B =0 (b) A.B=24 (c) (|A|/|B|)=1/2 (d) A and B are anti parallel
Correct Answer:
A x B =0
Explanation: […]
A boy standing at top of a tower of 20 m height drops a stone
A boy standing at top of a tower of 20 m height drops a stone.assuming g=10 ms⁻²,the velocity with which it hits the ground is
Options
(a) 20 m/s (b) 40 m/s (c) 5 […]
Which of the following quantities has units but not dimensions
Which of the following quantities has units but not dimensions
Options
(a) displacements (b) angle (c) couple (d) speed
Correct Answer:
angle
Explanation:
Angle as well as solid angle do not have dimensional formula […]
In the equation y=asin(?t+kx),the dimensionals formula of ? is
In the equation y=a sin(?t+kx),the dimensional formula of ? is
Options
(a) [M⁰L⁰T⁻¹] (b) [M⁰LT⁻¹] (c) [ML⁰T⁰] (d) [M⁰L⁻¹T⁰]
Correct Answer:
[M⁰L⁰T⁻¹]
Explanation:
Angle is dimension less quantity. So the argument (?t-kx) is […]
What determines the nature of the path followed by the particle?
What determines the nature of the path followed by the particle?
Options
(a) Speed (b) Velocity (c) Acceleration (d) Both (b) and (c)
Correct Answer:
Both (b) and (c)
Explanation:
No explanation available. […]
If the error in the measurement of momentum of particle is (+100%)
If the error in the measurement of momentum of particle is (+100 % ), then the error in the measurement of kinetic energy is
Options
(a) 100 % (b) 200 % (c) 300 % […]