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Chapter 13 - Current and Electricity - 1
1.
An electric current is caused by the motion of _____________.
a) Neutrons
b) Protons
c) Electric changes
2.
In a metal the _______________ are not attached to individual atom.
a) Valence electrons
b) Valence Protons
c) Valence Neutrons
3.
The speed of randomly moving electrons depends upon ______________.
a) Length of the conductor
b) Temperature
c) Thickness of the conductor
4.
A steady current flows in a wire when a constant __________ is maintained across it.
a) Potential difference
b) Power
c) Current
d) Energy
5.
When current flows through conductor____________ is produced around it.
a) Electric lines
b) Electric field
c) Magnetic field
6.
The liquid which conducts current is known as____________.
a) Insulator
b) none is correct
c) Electrolyte
d) Conductor
7.
Positive electrode is known as__________.
a) Anode Rays
b) Anode
c) Anode Rays
d) Cathode
8.
Symbolically ohm’s law can be written as _________.
a) R=VI
b) V=IR
c) I=VR
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