V2/R=:
Power
Energy
Voltage
Resistance
The mirror whose inner surface is reflecting is called:
Concave mirror
Convex mirror
Mirror
Lens
Which component is output device of computer:
CPU
C.D
Keyboard
Monitor
Which is not an e.m.f source:
Generator
Solar cell
Battery
Rheostat
the resistance of conductor is inversely to:
temperature
length
area of cross section
pressure
Joule’s law is W=
IR/t
IRt2
IR2t
I2Rt