A particle has initial velocity (2i⃗+3j⃗) and acceleration (0.3i⃗+0.2j⃗). The magnitude of velocity after 10 seconds will be:
Options
(a) 9 √2 units (b) 5 √2 units (c) 5 units (d) 9 units
Correct […]
If force(F),velocity(v) and time(T) are taken as fundamental units, then the dimensions of mass are
Options
(a) [FvT⁻¹] (b) [FvT⁻²] (c) [Fv⁻¹T⁻¹] (d) [Fv⁻¹T]
Correct Answer:
[Fv⁻¹T]
Explanation:
Force = Mass x Acceleration
F […]
The dimension of 1/2ε₀E², where ε₀ is permittivity of free space and E is electric field, is:
Options
(a) ML²T⁻² (b) ML⁻¹T⁻² (c) ML²T⁻¹ (d) MLT⁻¹
Correct Answer:
ML⁻¹T⁻²
Explanation:
1/2 ?￢ﾂﾀE² represents […]
If two vectors 2i+3j+k and -4i-6j-λk are parallel to each other, then the value of λ is
Options
(a) 0 (b) -2 (c) 3 (d) 4
Correct Answer:
-2
Explanation:
No explanation available. Be […]
At what angle should the two forces 2P and √2 P act,so that the resultant force is P√10?
Options
(a) 45ﾟ (b) 60ﾟ (c) 90ﾟ (d) 120ﾟ
Correct Answer:
45ﾟ
Explanation:
No explanation available. […]
A bullet is shot from a riffle. As a result the rifle recoils.The kinetic energy of riffle as compared to that of bullet is
Options
(a) less (b) greater (c) equal (d) cannot be concluded
Correct […]
A body is rolling down an inclined plane. If KE of rotation is 40% of KE in a transitory state, then their body is a
Options
(a) ring (b) cylinder (c) hollow ball (d) solid ball
Vectors A⃗, B⃗ and C⃗ are such that A⃗ . B⃗ = 0 and A⃗ . C⃗ = 0 Then the vector parallel to A⃗ is
Options
(a) B⃗ and C⃗ (b) A⃗ x […]
A moving neutron collides with a stationary α-particle.The fraction of the kinetic energy lost by the neutron is
Options
(a) 16/25 (b) 9/25 (c) 3/5 (d) 2/5
Correct Answer:
16/25
Explanation:
No explanation […]
If force(F),length(L) and time(T) be considered fundamental units, then the units of mass will be
Options
(a) [FLT⁻²] (b) [FL⁻²T⁻¹] (c) [FL⁻¹T²] (d) [F²LT⁻²]
Correct Answer:
[FL⁻¹T²]
Explanation:
Force = Mass x Acceleration [F] […]
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