Physics FSC Part 2 Chapter 14 Online MCQ's Test

Brightness of screen of CRO controlled by

• Grid A
• Filament B
• Anode C
• Cathode D

• 
  A
• 
  B
• 
  C
• None of the above D

A battery is used in

• ohmmeter A
• Ammeter B
• Galvanometer C
• Voltemeter D

Which one has the least resistance.

• Galvanometer A
• Ammeter B
• Ohm meter C
• Volta meter D

The dimensions of magnetic flux are

• M¹L^-2T¹A¹ A
• MLT^-2A^-1 B
• ML²T²A^-1 C
• ML²T^-2A^-1 D

A current carrying conductor experience maximum magnetic force in a uniform magnetic field when it is placed.

• Perpendicular to field A
• Parallel to field B
• At an angle of 60 ^o to the field C
• None of these D

When a charge is projected perpendicular to a uniform magnetic field, tis path is

• Spiral A
• Helix B
• Ellipse C
• Circular D

A sensitive galvanometer is

• Unstable A
• Stable B
• Moderate C
• Both B and C D

The function of three anodes a C.R.O is

• To accelerate electrons only A
• To focus the electrons only B
• To control the brightness of spot on screen C
• To accelerate and focus the electrons D

The value of e/m is smallest for

• Proton A
• Electron B
• Beta particle C
• Positron D

The force on a charge particle moving parallel to magnetic field is:

• Maximum A
• Minimum B
• Zero C
• None of these D

The Grid 'G' in cathode ray oscilloscope.

• Accelerate as well as focus electron beam A
• Control no. of electrons beam B
• Is at - Ve potential with respect to cathode. C
• Both d and b  D

The unit of permiability of free space is:

• T.m/A A
• T.m²/A B
• T.m/A² C
• None of these D

In order to measure potential difference voltmeter is always connected in.

• Series A
• Parallel B
• Both a and b C
• Neither in series nor in parallel D

The SI Unit of magnetic induction is.

• Weber A
• Tesla B
• Gauss C
• Newton D

An AVO meter can also be called as.

• Digital multimeter A
• Digital voltmeter B
• Digital ammeter C
• Digital ohm meter D

The acceleration of an electron of mass m and charge e, moving with uniform speed v at right angles to a magnetic field of flux density B, is given by

• 
  A
• 
  B
• 
  C
• Bevm D