The angle between the two vectors A = 3i+4j+5k and B = 3i+4j-5k will be
The angle between the two vectors A = 3i + 4j + 5k and B = 3i + 4j – 5k will be
Options
(a) 90ﾟ (b) 0ﾟ (c) 60 ﾟ (d) 45ﾟ
Correct […]
Physics
A particle is released from rest from a tower of height h, i.e,t₁ : t₂ : t₃ is
A particle is released from rest from a tower of height 3h, the ratio of time of fall for equal heights h (t₁ : t₂ : t₃ is)
Options
(a) √3 : √2 : 1 […]
A particle moves in a circle of radius 5 cm with constant speed and time period
A particle moves in a circle of radius 5 cm with constant speed and time period 0.2πs. The acceleration of the particle is
Options
(a) 15 m/s² (b) 25 m/s² (c) 36 m/s² (d) […]
If the dimensions of a physical quantity are givenby Mᵃ Lᵇ Tᶜ, then the physical
If the dimensions of a physical quantity are givenby Mᵃ Lᵇ Tᶜ, then the physical quantity will be:
Options
(a) Velocity if a= 1, b = 0, c = – 1 (b) Acceleration […]
Young’s modulus of the material of a wire is 18×10¹¹ dyne cm⁻².its value in SI is
Young’s modulus of the material of a wire is 18 x 10¹¹ dyne cm⁻². Its value in SI is
Options
(a) 18 x 10¹⁵ Nm⁻² (b) 18 x 10¹⁰ Nm⁻² (c) 18 x 10⁹ […]
Let A = i Acosθ +j B sinθ be any vector.Another vector B which is normal to A is
Let A = i Acosθ +j B sinθ be any vector.Another vector B which is normal to A is
Options
(a) i B cosθ + i B sinθ (b) i B sinθ + j […]
If a vector 2i+3j+8k is perpendicular to the vector 4j-4i+αk, then value of α is
If a vector 2i+3j+8k is perpendicular to the vector 4j-4i+αk, then value of α is
Options
(a) -1 (b) 1/2 (c) -(1/2) (d) 1
Correct Answer:
-(1/2)
Explanation:
No explanation available. Be the first […]
The radius of a ball is(5.2±0.2)cm.The percentage error in the volume of the ball
The radius of a ball is(5.2±0.2)cm.The percentage error in the volume of the ball is approximately
Options
(a) 11 % (b) 4 % (c) 7 % (d) 9 %
Correct Answer:
11 %
Explanation: […]
If the angular momentum of any rotating body increase by 200 % , then the increase
If the angular momentum of any rotating body increase by 200%, then the increase in its kinetic energy
Options
(a) 400 % (b) 800 % (c) 200 % (d) 100 %
Correct Answer:
800 […]
The physical quantity which does not have the same dimensions as the other three is
The physical quantity which doesnot have the same dimensions as the other three is
Options
(a) spring constant (b) surface tension (c) surface energy (d) acceleration due to gravity
Correct Answer:
acceleration due […]