12th Class FSC Part 2 Physics Online Test

The electromagnetic spectrum contains

• Radio waves A
• X-rays B
• Microwaves C
• All of these D

Maximum Compton shift is observed at.

• 30^oC A
• 90^oC B
• 45^oC C
• 180^oC D

The solid with definite M.L are called:

• Crystalline A
• Amorphous B
• Polymeric C
• None of above D

Two parallel wires carrying currents in the opposite direction.

• Repel each other A
• Attract each other B
• Have no effect upon each other C
• They cancel out their individual magnetic fields. D

• Lenz's law A
• Faraday's law B
• Ampere's law C
• None of these D

Selenium is a

• Insulator A
• Photoconductor B
• Conductor C
• First insulator then conductor D

Binding energy for deuteron nucleus is given by

• 2.8 MeV A
• 2.23 MeV B
• 2.28 MeV C
• 2.25 MeV D

When platinum wire is heated, it changes to cherry red at temperature.

• 500^oC A
• 900^oC B
• 1100^oC C
• 1300^oC D

The domain theory of magnet is important to explain the behaviour of

• Diamagnets A
• Paramagnets B
• Ferromagnets C
• All of these D

At resonance frequency, the impedance of RLC series circuit is.

• Maximum A
• Minimum B
• Zero C
• Infinite D

The quantity of U in the naturally occurring uranium is.

• 0.2% A
• 0.3% B
• 0.7% C
• 0.4% D

When a PN-Junction is reverse biased the depletion region is.

• Widened A
• Narrowed B
• Normal C
• None of these D

When platinum is heated is become dull red at:

• 900°C A
• 500°C B
• 800°C C
• 1100°C D

A particles equal or greater in mass than of protons are called.

• Baryons A
• Leptons B
• Mesons C
• Quarks D

The circuit of full wave rectification consist of

• Three diodes A
• Four diodes B
• Two diodes C
• One diode D

The most refined form of matter is:

• Smoke A
• Light B
• Ice C
• Fog D

Photo diode is used for detection of.

• Heat A
• Magnet B
• Current C
• Light D