3_4 Generation of Electricity

Thermocouple harnesses are made from the same materials as the thermocouple so that.

• mini junctions are not formed.

• the resistance is not increased beyond limits.

• they will not corrode.

Point A on the armature of the generator shown is producing.

• minimum current.

• zero current.

• maximum current.

A piezoelectric device generates electricity through.

• friction.

• light.

• pressure.

A photozoidal cell produces electricity when subjected to.

• light.

• pressure.

• heat.

A thermocouple indicator is basically a type of.

• millivoltmeter.

• milliammeter.

• milliohmeter.

A light/heat sensitive cell is a.

• transistor.

• diode.

• transducer.

The diagram shows a current carrying conductor (A) in a magnetic field. The conductor will move.

• upwards.

• sideways.

• downwards.

A component that produces an output voltage due to incident light is called a.

• liquid crystal.

• solar cell.

• light emitting diode.

The flux density of a magnetic field is 1.5T. The length of the conductor in the field is 2 m and the speed of the conductor is 10 m/s. The EMF induced is.

• 0.3 V.

• 7.5 V.

• 30 V.

A conductor is placed in a magnetised coil. What will happen?.

• Nothing will happen unless the conductor is moved.

• The conductor will move.

• A force will be created.