Atomic Spectra… | NUST Entrance Test Physics

During the transition of electron of hydrogen atom from higher orbit to third orbit, a photon of:

Difficulty: Easy

A:

Lyman series is emitted

B:

Balmer series is emitted

C:

Paschen series is emitted

D:

Brackett series is emitted

Only those orbits are allowed for the electrons of hydrogen atom for which orbital angular momentum is equal to an integral multiple of:

Difficulty: Easy

A:

2h

B:

\frac{nh}{2\pi}

C:

2\pi h

D:

\frac{h}{2\pi}

mvr is an expression for:

Difficulty: Easy

A:

Linear momentum

B:

Angular momentum

C:

Momentum of a force

D:

Torque

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