independent voltage sourceindestructibleindeterminateindexindex of refractionindex registerindexingindicationindicatorindirectindirect addressindirect measurementindirect operationindirect scanningindirectly controlled variableindirectly heated cathode unipotential cathode heater type cathodeindirectly ionizing particlesindistinctindiumindium antimonideindium antimonide detectorindium arsenideindium phosphideindividualinduceinducedinduced chargeinduced conductivityinduced currentinduced electron emissioninduced emfinduced voltageinductanceinductance bridgeinductance capacitanceinductance matrixinductance mutualinductance selfinductance switchinductioninduction brazinginduction coilinduction compassinduction conduction heaterinduction couplinginduction currentinduction fieldinduction furnaceinduction generatorinduction hardening