Second Year Physics Chapter 14 Online MCQ Test for 2nd Year Physics Chapter 14 Electromagnetism Preparation

The magnetic field  inside solenoid is given:

• μ_∘nI² A
• μ_∘nI B
• μ_∘n/1² C
• μ_∘I/n D

An electron enters the magnetic field at right angle from left, B is into paper. The electron will be deflected.

• upward A
• To ward right B
• Down ward C
• Toward left D

μ_∘ (Ampere's constant) has value. 

• 4πx10^-7 WbA^-1m^-1 A
• 4πx10^-17 Wbm² B
• 4πx10⁷ WbA^-1m^-1 C
• 4πx10-27 Wb/m² D

If the length of solenoid is doubled but N same, B inside the solenoid becomes.

• Half A
• Doubled B
• One fourth C
• Four times D

Brightness of screen of CRO controlled by

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

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

An electron moves at 2 x 10² m/sec perpendicular to magnetic field of 2T what is the magnitude of magnetic force:

• 1 x 10^-6 N A
• 6.4 x 10^-17 N B
• 3.6 x 10^-24 N C
• 4 x 10⁶ N D

If the length and number of turns of a solenoid are doubled strength of magnetic field with.

• Be doubled A
• Become half B
• Not change C
• Be four time D

The magnetic force is simply a

• Reflecting force A
• Deflecting force B
• Restoring force C
• Gravitational force D

The brightness of the spot of CRO screen is controlled by.

• Anode A
• Cathode B
• Grid C
• Deflecting plates D

If current flowing through a solenoid becomes four times, then magnetic field inside becomes.

• two times A
• three times B
• four times C
• Half D

The value of e/m is smallest for

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

The sum of electric and magnetic force is called.

• Maxwell force A
• Lorentz force B
• Newton's force C
• Centripetal force D

NIBA =

• cθ A
• θ/c B
• c²θ C
• c²/θ 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

1 tesla =

• 1 MAm^-1 A
• 1NA^-1m B
• 1NA^-1m^-1 C
• None of above D

If a low resistance is connected parallel to a galvanometer then galvanometer is converted.

• Ammeter A
• Voltammeter B
• Ohmmeter C
• Multimeter D