The electric potential across part AB of a circuit is 5 V; point A being at higher potential. If a charge of 5 Cmoves from A to Ba then energy released as
5 joules
25 joules
10 joules
100 joules
Correct Answer :
B. 25 joules
Related Questions
The emf produced in a wire by its motion across a magnetic field does not depend upon the
Diameter of the wire
Length of the wire
Orientation of the wire
Flux density of the field
There are how many compounds available in nature?
300a000
Unlimited
What is the SI unit of specific resistance or resistivity?
Ohm-circular mil per inch
Ohm-circular mil per foot
Ohm-m
Ohm-cm
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Mmf
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R eluctivity
A principle that states that only two electrons with different spins are allowed to exist in a given orbit
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Pauli exclusion principle
Avogadro's principle
Coulomb's principle
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ferromagnetic
paramagnetic
non-magnetic
What is the SI unit of conductivity?
Ohms/m
Ohms-m
Siemens-m
Siemens/m
What is the reluctance of a magnetic path having a length of 2x 10^-3m and crosssectional area of 2.5 x 10^-3 m^2?
6366 A, t/Wb
6000 A, t/Wb
8x10^-3 A, t/Wb
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A length of wire has a resistance of 10 ohms. What is the resistance of a wire of the same material three times as long and twice the cross-sectional area?
30 ohms
20 ohms
15 ohms
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1.3 x 10^-19
1.4 x 10^-19
1.5 x 10^-19
1.6 x 10^-19
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Coulomb's law
Joule's law
Faraday's law
Ohm's law
A negatively charge body has
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excess of protons
excess of electrons
deficit of neutrons
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ACmotors
Permanent Magnets
DC generators
Three charges of +5 Ca -6 C and +9 C are placed inside a sphere. What is the total flux passing through the surface of sphere?
8 C
14 C
20 C
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Rotation
Repulsion
Torque action
Who developed the electromagnetic theory of light in 1862?
Heinrich Rudolf Hertz
Wilhelm Rontgen
James Clerk Maxwell
Andre Ampere
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45o
60o
30o
90o
Referred to as the specific reluctance of a material
Resistivity
Reluctivity
Conductivity
Permeability
Electric lines of force leave or enter the charge surface at an angle of
30o
45 o
90o
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The emf induced in a coil due to the changing current of another neighboring coil is called
Mutually induced emf
Self induced emf
Statically induced emf
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Is found by the right hand rule
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5 × 10^-5 N/Wb
500 × 10^3 N/Wb
4 × 10^7N/Wb
4 × 10^7N/Wb
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Alnico
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Hipernik
Manganin
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The magnetic flux can be changed.
Hysteresis can be decreased.
Magnetic materials can be used.
Abundance of ferromagnetic material that can be temporarily magnetized.
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By using a common core
By moving the coils closer
By moving the coils apart
By increasing the number of turns of either coil
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Soft magnetic materials
Hard magnetic materials
High hysteresis loss materials
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increases
decreases
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becomes infinite
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1 electron
+1 C
-20 C