The ionisation potential of hydrogen-atom is -13.6 eV. An electron in the groundstate
The ionisation potential of hydrogen-atom is -13.6 eV. An electron in the groundstate of a hydrogen-atom absorbs a photon of…
8 years ago
Physics
Radioactivity of a sample at T₁ time is R₁ and at time T₂ is R₂. If half-life
Radioactivity of a sample at T₁ time is R₁ and at time T₂ is R₂. If half-life of sample is…
8 years ago
Wires A and B are made from the same material. A has twice the diameter and three times
Wires A and B are made from the same material. A has twice the diameter and three times the length…
8 years ago
Which of the following will be σ if Y=2.4 η?
Which of the following will be σ if Y=2.4 η? Options (a) (-1) (b) 0.2 (c) 0.1 (d) (-0.25) Correct…
8 years ago
Length of second pendulum is
Length of second pendulum is Options (a) 100 cm (b) 60 cm (c) 120 cm (d) 80 cm Correct Answer:…
8 years ago
An object is attached to the bottom of a light vertical spring and set vibrating.
An object is attached to the bottom of a light vertical spring and set vibrating. The maximum speed of the…
8 years ago
Two discs of same material and thickness have radii 0.2 m and 0.6 m.
Two discs of same material and thickness have radii 0.2 m and 0.6 m. Their moments of inertia about their…
8 years ago
A ballet dancer, dancing on smooth floor, is spinning about a vertical axis
A ballet dancer, dancing on smooth floor, is spinning about a vertical axis with her arms folded with an angular…
8 years ago
A car is moving with uniform acceleration. It covers 200 m in 2 sec and 220 m
A car is moving with uniform acceleration. It covers 200 m in 2 sec and 220 m in next 4…
8 years ago
A boy playing on the roof of a 10m high building throws a ball with a speed
A boy playing on the roof of a 10m high building throws a ball with a speed of 10 m/s…
8 years ago