- battery rack
- battery vehicle
- bayonet cap
- bayonet coupling
- bayonet joint
- bayonet socket
- beacon light
- bass boost
- bass respond
- battery
- battery circuit
- battery resistance
- battery-powered
- bayonet holder
- beam
- beam shaping
- bearing current
- beat frequency
- beating
- Becquerel cell
- belt fork
- belted cable
- bench
- bench anvil
- bending fatigue
- bending loss
- bending test
- beta particle
- beta ray
- betatron
- bias
- bias circuit
- bias current
- bias generator
- bias potentiometer
- bias source
- bias types
- bias winding
- biased relay
- bidirectional coupler
- bidirectional motor
- bidirectional network
- bidirectional switch
- bifilar
- bifilar electrometer
- bifilar winding
- bifurcating box
- binaural broadcast
- binaural tape
- bilevel operation
- billing
- bimetallic contact
- bin card
- binaural amplifier
- binding post
- bioelectric
- biphase
- biphase current
- bipolar circuit
- bipolar electrode
- bipolar line
- bipolar machine
- bipolar winding
- bistable relay
- blade
- blade ring
- blanking pulse
- bimetal
- bimetallic switch
- bimetallic wire
- bimorph cell
- binary digit
- binary scale
- binaural
- binaural disk
- Bitter figure
- black level
- blackening
- blast burner
- blast pipe
- blast valve
- block reactance
- blocked impedance
- blocking capacitor
- blocking period
- bleeder
- blip
- blocking oscillator
- blooming
- bobbin insulator
- Bohr magneton
- boiler data
- boiler department
- bonding jumper
- booster amplifier
- booster generator
- boots
- bordering tool
- bottom bearing
- bounce