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Oh thanks >.>
Ignore my post .. I see how it is.
Oh sorry man i swear i did not see ur reply , my mistake !!! ur post is helpful though so thank u and sorry again
PEACE
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Oh thanks >.>
Ignore my post .. I see how it is.
thanks =]Moment= forceX perpendicular distance of the line of action of force to the pivot
moment of a force= force x perpendicular distance from the force to the pivotHey
anyone knows the formula of the moment of force??
http://www.passmyexams.co.uk/GCSE/physics/electric-motors.html#2Can someone explain the left-hand and right-hand rules?
anytimeAWESOME! Thanks alot
Actually it says on the front of the exam, 3 significant figures and 2 decimal places for angles.whatever u feel like
Sensitivity:to increase the sensitivity of a thermometer you have to increase the length of the capillary tube and and to increase the range u have to have a finer capillary tube and a larger bulb right? Anything for linearity? no right?
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Physics (0625)/0625_w10_qp_31.pdf
Anyone can please explain how to answer the first and last questions? please.
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Physics (0625)/0625_w10_qp_31.pdf
Anyone can please explain how to answer the first and last questions? please.
thanx!!accelerationg anode only accelerates the electrons ... it has high dc voltage connected across it ! focuscing anode makes the electrons in a beam ! usally they both r intergrated n made into one
6 b)(i) it says it's almost parallel to AE, so the angle of incidence is 90 degrees
it says the ray is ALMOST parallel to AE - that means it has an angle of incidence of ALMOST 90.
thanks alotSensitivity:
To increase, decrease diameter of capillary tube or use a liquid with higher expansivity.
Range:
Opposite to sensitivity
Increase diameter of capillary tube or use liquid with lower expansivity
Linearity:
If a thermometer isn't linear then all you can do is replace the liquid with a linear liquid
THANK U SOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO MUCH6 b)(i) it says it's almost parallel to AE, so the angle of incidence is 90 degrees
6 b)(ii) at critical angle the refracted ray is at 90 degrees while here the incident ray is 90 degrees. So that refracted ray in this case is the critical angle which is 43 degrees.
6 b)(iii) refractive index= sin i/sin r so sin 90/sin 43 = 1.47
it says the ray is ALMOST parallel to AE - that means it has an angle of incidence of ALMOST 90.
Mark scheme says anything between 88-90 is acceptable, so I'd write 89.
The critical angle occurs when the ray going from more optically dense medium to less optically dense medium is refracted with an angle of refraction of 90*. b)i) Is that but opposite - you're looking at the refracted ray of angle 90* as an incident ray of angle 90* - so the critical angle is 43*
refractive index = 1/sinC where C is the critical angle
so n=1/sin43 = 1.466
left hand rule is used to determine the direction of force if given direction of current and magnetic field. On your left hand raise your thumb(will represent force) ,make your first finger face with the direction of magnetic field, your second middle finger should be perpendicular to the first finger and facing the direction of current, the ndirection where your thumb looks is the direction of force. i found a video on youtube showing you what i just said hope it helps,Can someone explain the left-hand and right-hand rules?
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