- availability
- ayrton shunt
- B battery
- B-supply
- bable clamp
- back contact
- back discharge
- back porch
- backfire
- backlighting
- backup
- backup line
- backward wave
- Bacon cell
- automatic switch
- avalanche transistor
- axial leads
- B-display
- bable box
- automatic starter
- automation
- axial armature
- bactericidal lamp
- bad contact
- bakelite
- bakelized
- baking varnish
- balanced amplifier
- balanced circuit
- balanced current
- balanced currents
- balanced line
- balanced load
- balanced modulator
- balancing capacitor
- balancing coil
- balancing reaction
- bale cargo
- ball crusher
- ball grinder
- ball test
- ballast
- ballast resistor
- ballast tube
- ballastic galvanometer
- ballasting circuit
- banana plug
- band spread
- band switch
- bandoliered components
- bank
- base electrode
- base insulator
- base load
- basket coil
- bass compensation
- battery backup
- battery capacity
- battery charging
- battery electrode
- battery frame
- battery jar
- battery terminal
- bayonet base
- banked winding
- bar armature
- bar electromagnet
- barrel winding
- barretter
- barrier region
- bearing ball
- beat note
- bel
- bell battery
- bell push
- bell transformer
- bar suspension
- bar winding
- bare cable
- bare conductor
- barium titanate
- barrel
- barrier
- base
- base contact
- base plate
- base resistance
- basic current
- basic industry
- basic module
- basic voltage
- basket winding
- bass
- bass reflex
- batch calibration
- battery charge
- battery charger
- battery clip
- battery framework
- battery operation