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Electro Magnetism

Q.1) The purpose of choke in a fluorescent lamp is

(A) To decrease the voltage momentarily

(B) To increase the flow of current

(C) To decrease the resistance

(D) To decrease the flow of current

Q.2) The cause of magnetism in materials is

(A) Electrons at rest

(B) Protons at rest

(C) All stationary neutrons

(D) Circular motion of electrons.

Q.3) Uniform magnetic field is represented by

(A) Closed curves

(B) Parallel lines

(C) Convergent lines

(D) Divergent lines

Q.4) What is the unit of electrical conductivity?

(A) Ohm

(B) Ohm-cu

(C) Mho

(D) Ohm/cu

Q.5) Who discovered the link between electricity and magnetism?

(A) Maxwell

(B) Diesel

(C) Michael faraday

(D) Volta

Q.6) Tesla is the unit of Magnetic field

(A) Induction

(B) Moment

(C) Area

(D) Flow

Q.7) Resistance of a conductor increases on

(A) Increasing length

(B) Decreasing area of cross-section

(C) Increasing temperature

(D) All of these

Q.8) Which of the following rated electric bulb?

(A) Power and current

(B) Power and voltage

(C) Current and voltage

(D) Energy and current

Q.9) Chemical energy is converted into electric energy

(A) Dynamo

(B) Electric Fan

(C) Battery

(D) Atom bomb

Q.10) Certain substances looses their electrical resistance completely at super low temperature such substances are called

(A) Super conductor

(B) Semi conductor

(C) Dielectric

(D) Perfect conductor

ਜੇਕਰ ਤੁਸੀ ਕਿਸੇ ਵੀ ਸਰਕਾਰੀ ਨੌਕਰੀ ਬਾਰੇ ਜਾਣਕਾਰੀ ਲੈਣਾ ਚਾਹੁੰਦੇ ਹੋ ਤਾ ਉੱਤੇ ਦਿੱਤੇ ਕੰਮੈਟ ਬਾਕਸ ਵਿੱਚ ਕੰਮੈਟ ਕਰ ਸਕਦੇ ਹੋ ਧੰਨਵਾਦ ਅਰਨ ਮਨੀ ਜੋਬਜ ਟੀਮ