Explore topic-wise MCQs in Testing Subject.

This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.

1.

Energy of a photon of wavelength 5890A° emitted by sodium vapour lamp is

A. 2.1 J
B. 2.1 MeV
C. 2.1 eV
D. 2.1 Cal
Answer» D. 2.1 Cal
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