1000+ Physics Questions for SSC CGL Tier 1, Tier 2 Exam Pdf - 2

Question: 6

Carriers of electric current in superconductors are

(A) phonons

(B) holes

(C) photons

(D) electron

Question: 7

The electric field intensity on the surface of a charged conductor is

(A) directed along 45° to the surface

(B) directed tangentially to the surface

(C) directed normally to the surface

(D) zero

Question: 8

Energy stored in the choke coil in the form of

(A) magnetic energy

(B) electric energy

(C) heat

(D) none of these

Question: 9

Radioactivity was discovered by

(A) M. Curie

(B) H. Becquerel

(C) W. Roentgen

(D) J.J. Thomson

Question: 10

The diameter of optical fibre is

(A) 10^-2 cm

(B) 10^-3 cm

(C) 10^-4 cm

(D) 10^-5 cm