Options:
- A. NA-1m-1
- B. NAm-1
- C. NmA-1
- D. NmA-2
View Answer
A. NA-1m-1
Physics
If the plane of the rectangular coil is parallel to the magnetic field (i.e radial magnetic field) the torque on the coil is_____________________?
Options:
- A. ? = NIAB cos?
- B. ? = NIAB sin?
- C. ? = NIAB tan?
- D. ? = NIAB
View Answer
D. ? = NIAB
Electromagnetic waves travel in free space with the speed of___________________?
Options:
- A. ?-rays
- B. Positive rays
- C. Cathode rays
- D. More than sound waves
View Answer
A. ?-rays
A 100
Options:
- A. 32?
- B. 62?
- C. 50?
- D. 100?
View Answer
A. 32?
Two identical coaxial circular loops carry equal currents in the same direction. If the loops approach each other the current in______________?
Options:
- A. Each increase
- B. Each decrease
- C. Each remains the same
- D. One increases whereas that in the other decreases
View Answer
B. Each decrease
The unit vector in the direction of vector A = 2 i^ -2j^ + k^ is_______________?
Options:
- A. 2i^
- B. (2i^
- C. (2i^
- D. (2i^
View Answer
C. (2i^
An angle between two vectors A and B can be determined by_____________?
Options:
- A. Their dot product
- B. Their cross product
- C. Head to tail rule
- D. Right-hand rule
View Answer
A. Their dot product
Which one of the following radiation possesses maximum penetrating power ?
Options:
- A. X-rays
- B. B-rays
- C. ?-rays
- D. All have the equal penetrating powe
View Answer
C. ?-rays
Mass of neutron is________________?
Options:
- A. 1.67 x 10-31 kg
- B. 1.67 x 10-27 kg
- C. 9.1 x 10-31 kg
- D. 1.67 x 10-19 kg
View Answer
B. 1.67 x 10-27 kg
An elevator weighing 3.5 x 10-6 N is raised to a height of 1000 m in the absence of friction, the work done is_________________?
Options:
- A. 3.5 x 103 J
- B. 3.5 x 104 J
- C. 3.5 x 106 J
- D. 3.5 x 109 J
View Answer
D. 3.5 x 109 J