Measurement and Calculation (Pretest)

Unit of Electrical Current

• Volt

• Ohms

• Ampere

• Kilo

Is a two terminal device that conduct current more easily in only one direction.

• LED

• Capacitor

• Resistor

• Diode

The unit of electric power

• Watt

• Ohm

• Kilo

• Ampere

Sometimes referred to as "volt-ohm-meters", abbreviated as VOM is an electronic measuring instrument that combines several functions in one unit.

• Try Square

• Analog Multimeter

• Steel rule

• Protractor

If the range multiplier is selected to X10 and the ohmmeter scale needle pointer stops at 5, what is the correct answer?

• 50 volts

• 50 ohms

• 15 ACV

• 25 DCV

If the pointer stopped at minor division scale 13 and the range used 50 DCV, so the reading is

• 13 ACV

• 15 DCV

• 13 DCV

• 50 ACV

If the pointer stopped at minor division scale 43 and the range used 250 ACV, so the reading is

• 215 ACV

• 15 volts

• 250 DCV

• 10 Ohms

A rheostat has a 1.5 A of current, what adjusted value of resistance will cause power dissipation of 12 W?

• 48 Ohms

• 17.9 V

• 2A

• 8 Ohms

An 8 Ohms loudspeaker is producing a power of 32 W, what is the current drain?

• 2 A

• 48 Ohms

• 36 W

• 8 Ohms

Suppose the heater dissipated a power of 100 W and a current drain of 1 A. How much is the voltage applied across the heater?

• 48 V

• 19 V

• 100 V

• 2 A