一带电粒子垂直磁感应线射入匀强磁场,则它作___运动; With the electric particle vertical magnetic induction line into the uniform magnetic field, it makes ___motion;
A.直线; straight lines;
B.变速率圆周; speed change rate of the circumference;
C.匀速率圆周; uniform speed of the circumference;
D.螺线; spiral;
第1题:
Magnetic dip is a measurement of the angle between the ______.
A.geographic pole and the magnetic pole
B.lubber’s line and true north
C.horizontal and the magnetic line of force
D.compass heading and the magnetic heading
第2题:
磁场(magnetic field)
第3题:
以一定速度v运动的带电粒子垂直进入匀强磁场B中最一般的运动形式是()。
第4题:
north magnetic pole
south magnetic pole
magnetic prime vertical meridian
magnetic equator
第5题:
voltage
current
power
frequency
第6题:
deviation
variation
compass error
dip
第7题:
the compass will become useless
man and animals will be confused as to directions
the magnetic strength of the Earth will disappear
the magnetic strength of the Earth will be stronger
第8题:
geographic pole and the magnetic pole
lubber's line and true north
horizontal and the magnetic line of force
compass heading and the magnetic heading
第9题:
动能不变
做匀速直线运动
速度不变
加速度不变
第10题:
An agonic line
The magnetic equator
A magnetic meridian
All of the above
第11题:
operation of electrical equipment and generators on board ship
the earth's magnetic field affecting the ship's hard iron during construction
the horizontal component of the earth's magnetic field acting on the horizontal soft iron
the vertical component of the earth's magnetic field acting on the vertical soft iron
第12题:
elevation
magnetic angle
vertical angle
dip
第13题:
带电粒子以一定速度垂直射入匀强磁场,若只考虑洛伦磁力,则粒子一定()。
第14题:
磁异常(magnetic anomaly)
第15题:
沿着电场线方向飞入匀强电场,电场力做功,动能增加
沿着磁感线方向飞入匀强磁场,磁场力做功,动能增加
垂直电场线方向飞入匀强电场,在电场中运动,电场力不做功
垂直磁感线方向飞入匀强磁场,在磁场中运动,磁场力不做功
第16题:
第17题:
degaussed
demagnetized
soaked
sandblasted
第18题:
The Flinders bar
The heeling magnet
Quadrantal soft iron spheres
Bar magnets in the binnacle
第19题:
needles are nearly in line with the meridian
vessel is near the magnetic poles
variation is near zero
vessel is near the magnetic equator
第20题:
we should not worry about the transition of the Earth’s magnetic field
the Earth’s magnetic field will not change for at least 2000 years
the Earth’s magnetic field has decreased its strength rapidly
the transition of the Earth’s magnetic field can be controlled by modern science
第21题:
like magnetic poles attract
unlike magnetic poles repel
unlike poles attract
the poles of the compass line up with the geographic poles of the earth
第22题:
第23题:
anchor chain
wire rope
connecting links
pendant wires
第24题:
the lines of force cross the equator on a 0°-180°alignment
the quadrantal error is 0°
there is no vertical component of the Earth's magnetic field
the intercardinal headings have less than 1°