12th Class FSC Part 2 Physics Online Test

When an electron in an atom goes from a lower to higher orbit its:

• K.E increases , P.E decreases A
• K.E increases , P.E increases B
• K.E decreases , P.E increases C
• K.E decreases , P.E decreases D

The wave form of alternating voltage is a

• Cotangent curve A
• Cosine curve B
• Sine curve C
• Tangent curve D

The resistance between the inverting (-) and non inverting inputs is called Input resistance and is the order of.

• Ohms A
• Kilo Ohms B
• Mega Ohms C
• Thounds Ohms D

Electrons are

• Hadrons A
• Laptons B
• Quarks C
• Baryons 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

The Basic circuit element in a D.C. circuits which controls the current and voltage is

• Resistor
  A
• Inductor B
• Capisitor
  C
• Transistor D

A capacitor stores energy in the form of.

• Magnetic field A
• Heat energy B
• Electrical energy C
• Mechanical energy D

The anodes in cathode ray oscilloscope.

• Control number of waves A
• Control brightness of sept formed B
• Accelerate as well as focus beam C
• Negative potential w.r.t to chithode D

The SI unit of resistivity is.

• Ohm m-2 A
• Ohm m-1 B
• Ohm m C
• Ohm D

The SI unit of stress is same as that of.

• Pressure A
• Force B
• Momentum C
• Work D

The line radiations emitted from by hydrogen filled discharge tube can be analyzed into.

• Band spectrum A
• Line spectrum B
• Continuous spectrum C
• Absorption spectrum D

• Wien's constant A
• Planck's constant B
• Davison constant C
• Lumber's constant D

The induced emf in a coil is proportional to:

• Magnetic flux through the coil A
• Rate of change of Magnetic flux through the coil B
• Area of the coil C
• Product of magnetic flux flux and area of the coil D

The relative permitivity of air is

• 79.5 A
• 1.006 B
• 1.06 C
• 1.0006 D

The concept of direction is purely

• Relative A
• Absolute B
• Relative to the motion C
• None of these D

The power factor of RL series circuit is.

• 0 A
• 1 B
• Less then 1 C
• More than one D

A PN junction can not be sued a.

• Rectifier A
• Amplifier B
• Detector C
• LED D