A body of mass 3 kg acted upon by a constant force is displaced by S meter
A body of mass 3 kg acted upon by a constant force is displaced by S meter, given by relation S=1/3t², where t is in second. Work done by the force in2 seconds
Options […]
Physics
Two bodies of masses m and 4 m are moving with equal K.E. The ratio of their linear
Two bodies of masses m and 4 m are moving with equal K.E. The ratio of their linear momenta is
Options
(a) 1:2 (b) 1:1 (c) 4:1 (d) 1:4
Correct Answer:
1:2
Explanation: […]
A bus is moving with a velocity of 5 ms⁻¹ towards a huge wall.
A bus is moving with a velocity of 5 ms⁻¹ towards a huge wall. The driver sounds a horn of frequency 165 Hz. If the speed of sound in air is 335 ms⁻¹, the numebr […]
An engine is moving towards a wall with a velocity 50 ms⁻¹ emits a note of 1.2 kHz.
An engine is moving towards a wall with a velocity 50 ms⁻¹ emits a note of 1.2 kHz. Speed of sound in air=350 ms⁻¹. The frequency of the note after reflection from the wall as […]
White light reflected from a soap film (Refractive Index =1.5) has a maxima
White light reflected from a soap film (Refractive Index =1.5) has a maxima at 600 nm and a minima at 450 nm with no minimum in between. Then, the thickness of the film is
Two coherent sources of intensity ratio α interfere. In interference pattern,
Two coherent sources of intensity ratio α interfere. In interference pattern, Imax – Imin/ Imax+ Imin is equal to
Options
(a) 2α/1+α (b) 2√α/1+α (c) 2α/1+√α (d) 1+α/2α
Correct Answer:
2√α/1+α
Explanation:
No […]
If a carnot engine is working with source temperature at 227⁰C and sink
If a carnot engine is working with source temperature at 227⁰C and sink temperature at 27⁰C, its efficiency will be
Options
(a) 40% (b) 10% (c) 67% (d) 50%
Correct Answer:
40%
Explanation: […]
If the pressure of gas is increased from 1.01×10⁵ Pa to 1.165×10⁵ Pa and volume
If the pressure of gas is increased from 1.01×10⁵ Pa to 1.165×10⁵ Pa and volume is decreases by 10% at constant temperature then the bulk modulus of the gas is
Options
(a) 15.5×10⁵ […]
If the angle of minimum deviation is 60° for an equilateral prism, then the refractive
If the angle of minimum deviation is 60° for an equilateral prism, then the refractive index of the material of the prism is
Options
(a) 1.41 (b) 1.5 (c) 1.6 (d) 1.73
Correct […]
A microscope is having objective of focal length 1 cm and eye-piece of focal length 6 cm.
A microscope is having objective of focal length 1 cm and eye-piece of focal length 6 cm. If tube length is 30 cm and image is formed at the least distance of distinct vision, what […]