Options:
- A. ? = NIAB cos?
- B. ? = NIAB sin?
- C. ? = NIAB tan?
- D. ? = NIAB
View Answer
D. ? = NIAB
Physics
The standard vector symbol for flux density is ____________________?
Options:
- A. M
- B. L
- C. H
- D. B
View Answer
B. L
Magnetic flux and flux density are related by___________________?
Options:
- A. magnetic flux = flux density / area
- B. magnetic flux = flux density x area
- C. flux density = magnetic flux area
- D. flux density = magnetic flux x area
View Answer
B. magnetic flux = flux density x area
An electron enters a region where the electric field E is perpendicular to the magnetic field B. It will suffer no deflection if_________________?
Options:
- A. E = BeV
- B. B = eE/V
- C. E = BV
- D. E = BeV/2
View Answer
C. E = BV
The charged particle enters the uniform magnetic field in such a way that its initial velocity is not perpendicular to the field the orbit will be__________________?
Options:
- A. a circle
- B. a spiral
- C. an ellipse
- D. helix
View Answer
D. helix
n instrument which can measure potential without drawing any current is_____________________?
Options:
- A. voltmeter
- B. galvanometer
- C. cathode ray oscilloscope (CRO)
- D. ammeter
View Answer
C. cathode ray oscilloscope (CRO)
Value of permeability of free space in SI units is___________________?
Options:
- A. 4?x10-9 WbA-1m-1
- B. 4?x10-7 WbA-1m-1
- C. 4?x10-10 WbA-1m-1
- D. 4?x10-8 WbA-1m-1
View Answer
B. 4?x10-7 WbA-1m-1
When the coil of the galvanometer is in equilibrium then the deflecting couple is____________________?
Options:
- A. zero
- B. equal to the restoring couple
- C. greater than the restoring couple
- D. smaller than the restoring couple
View Answer
B. equal to the restoring couple
The magnetic field strength of solenoid is__________________?
Options:
- A. B = ?NI
- B. B = ?N/I
- C. B = ?nI
- D. Both B and C
View Answer
D. Both B and C
Which one of the following is not an electromechanical instrument ?
Options:
- A. galvanometer
- B. voltmeter
- C. ammeter
- D. AC transformer and DC generator
View Answer
D. AC transformer and DC generator