Question

In hydrogen atom which quantity is integral multiple of  

(a) Angular momentum

(b) Angular velocity

(c) Angular acceleration

(d) Momentum

Answer

(a) Angular momentum

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

An object is placed first at infinity and then at 20 cm from the object side focal plane of the convex lens. The two images thus formed are 5 cm apart. The focal length of the lens is

(a) 5 cm  

(b) 10 cm

(c) 15 cm

(d) 20 cm

If T is the half life of a radioactive material, then the fraction that would remain after a time   is

(a)   

(b)  

(c)  

(d)  

When a radioactive substance emits an a -particle, its position in the periodic table is lowered by

(a) One place

(b) Two places

(c) Three places

(d) Four places

A wire is broken in four equal parts. A packet is formed by keeping the four wires together. The resistance of the packet in comparison to the resistance of the wire will be

(a) Equal

(b) One fourth

(c) One eight

(d)  

On charging by conduction, mass of a body may:
Which type of a physical quantity is electric current?
As the net electric flux through a closed surface is zero, the total charge contained in the closed surface is also:

A bi-convex lens made of glass (refractive index 1.5) is put in a liquid of refractive index 1.7. Its focal length will

(a) Decrease and change sign

(b) Increase and change sign

(c) Decrease and remain of the same sign

(d) Increase and remain of the same sign

The resistance of a galvanometer is 90 ohms. If only 10 percent of the main current may flow through the galvanometer, in which way and of what value, a resistor is to be used

(a) 10 ohms in series

(b) 10 ohms in parallel

(c) 810 ohms in series

(d) 810 ohms in parallel

Two charged particles traverse identical helical paths in a completely opposite sense in a uniform magnetic field.