A ship A is moving westwards with a speed of 10 km/h .The time after
A ship A is moving westwards with a speed of 10 km/h .The time after which the distance between them becomes shortest, is
Options
(a) 0 h (b) 5 h (c) 5√2 h (d) […]
Questions
If A=4i+4j+4k and b=3i+j+4k, then angle between vectors A and B is
If A=4i+4j+4k and b=3i+j+4k, then angle between vectors A and B is
Options
(a) 180ﾟ (b) 90ﾟ (c) 45ﾟ (d) 0ﾟ
Correct Answer:
90ﾟ
Explanation:
No explanation available. Be the first to write the […]
If h is planck’s constant and λ is wavelength, h/λ has dimensions of
If h is planck’s constant and λ is wavelength, h/λ has dimensions of
Options
(a) momentum (b) energy (c) mass (d) velocity
Correct Answer:
momentum
Explanation:
Dimension of Planck’s constant = ML²T⁻¹
Dimension for wavelength […]
The horizontal range and the maximum height of a projectile are equal
The horizontal range and the maximum height of a projectile are equal. The angle of projection of the projectile is :
Options
(a) θ = tan⁻¹(1/4) (b) θ = tan⁻¹(4) (c) θ = tan⁻¹(2) […]
A missile is fired for maximum range with an initial velocity of 20 m/s
A missile is fired for maximum range with an initial velocity of 20 m/s. If g = 10 m/s², the range of the missile is
Options
(a) 40 m (b) 50 m (c) 60 […]
If R is the radius of the earth and g is the acceleration due to gravity
If R is the radius of the earth and g is the acceleration due to gravity on the earth surface, the mean density of the earth is
Options
(a) 4πG/3gR (b) 3πG/4gR (c) 3g/4πRG […]
Which of the following pairs of quantities does not have same dimensional
Which of the following pairs of physical quantities does not have same dimensional formulae?
Options
(a) work and torque (b) angular momentum and Planck’s constant (c) tension and surface tension (d) impulse and linear […]
A particle moves a distance x in time but according to equation x=(t+5)⁻¹
A particle moves a distance x in time but according to equation x=(t+5)⁻¹.The acceleration of particle is proportional to
Options
(a) (velocity)³/² (b) (distance)² (c) (distance)⁻² (d) (velocity) ²/³
Correct Answer:
(velocity)³/²
Explanation:
No […]
Which of the following physical quantities has neither dimensions nor unit
Which of the following physical quantities has neither dimensions nor unit
Options
(a) Angle (b) luminous intensity (c) coefficient of friction (d) current
Correct Answer:
coefficient of friction
Explanation:
No explanation available. Be […]
300j work is done in sliding a 2kg block up an inclined plane of height 10m
300j work is done in sliding a 2kg block up an inclined plane of height 10m.Taking g=10 ms⁻², work done against friction is
Options
(a) 200 j (b) 100 j (c) Zero (d) […]