The component of vector A=2i+3j along the vector i+j is
Options
(a) 5/√2 (b) 10√2 (c) 5√2 (d) 5
Correct Answer:
5/√2
Explanation:
No explanation available. Be the first to write the explanation for […]
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 […]
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 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
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?
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.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
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=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?
Options
(a) Speed (b) Velocity (c) Acceleration (d) Both (b) and (c)
Correct Answer:
Both (b) and (c)
Explanation:
No explanation available. […]
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