CBSE Class 8 Answered
Three plotting compasses are placed close to a current carrying wire wrapped around an insulator as shown in fig.How many compass needles will change direction if the current through the wire is increased?
Asked by m.nilu | 18 Nov, 2018, 10:27: AM
Expert Answer
At the locations, where compass A and compass C are placed as shown in figure, magnetic field lines are parallel to axis of coil.
Note that axis of coil is marked in figure. Field lines are marked in blue colour. compass deflection is shown in red color.
At the location, where compass B is placed, field lines are making some angle with the direction of axis of the coil.
This angle depends on the current passing through the coil.
Hence only deflection of compass-B will change according to the current passing through the coil.
Answered by Thiyagarajan K | 18 Nov, 2018, 10:50: PM
Application Videos
-
Friction and its factors
This video describes the friction and the factors affecting and cause of fr... -
ContactandNonContactForce
This video describes the difference of contact and non-contact forces and t... -
CalculatingPressure
This video describes the relation between pressure force and area -
ForceandEffects
This video defines the force and describes the effects of the force -
Atmospheric pressure
This video defines atmospheric pressure and cause of it and state the atmos...
Concept Videos
-
Physical Properties of Metals and Non-metals
This video explains the physical properties of metals and non-metals. -
Chemical Properties of Metals and Non-metals - 1
This video explains the reaction of metals and non-metals with oxygen. -
Flame
This video explains the structure of a flame. -
Light
Explanation of types of reflection with examples. -
Force and Pressure
Concept of pressure,its formula & SI units. Pressure exerted by liquids.
CBSE 8 - Science
Asked by r68091982 | 19 Apr, 2024, 07:32: PM
ANSWERED BY EXPERTCBSE 8 - Science
Asked by hiteshsisara973 | 23 Mar, 2024, 02:04: PM
ANSWERED BY EXPERTCBSE 8 - Science
Asked by thaman070410 | 13 Mar, 2024, 10:52: AM
ANSWERED BY EXPERTCBSE 8 - Science
Asked by tanishktayal26 | 09 Mar, 2024, 10:54: PM
ANSWERED BY EXPERTCBSE 8 - Science
Asked by sunitha.budhala | 06 Mar, 2024, 09:01: PM
ANSWERED BY EXPERTCBSE 8 - Science
Asked by vijaykumarreddych09 | 27 Feb, 2024, 08:32: PM
ANSWERED BY EXPERTCBSE 8 - Science
Asked by kavithac166 | 26 Feb, 2024, 07:10: PM
ANSWERED BY EXPERTCBSE 8 - Science
Asked by sunita.sain0107 | 24 Feb, 2024, 11:13: PM
ANSWERED BY EXPERTCBSE 8 - Science
Asked by muppurugeethanjali | 19 Feb, 2024, 06:45: PM
ANSWERED BY EXPERT
