Technical Subject 2010

A 6-volt lead-acid battery has an internal resistance of 0.01 ohm. How much current will flow if the battery has a

short circuit?

• 60A

• 600A

• Infinity

• Zero

A binary alloy of copper and zinc.

• Bronze

• Brass

• Alnico

• Steel

The resistance of a conductor when its temperature is increased

• Increases

• Remain constant

• Varies

• Decreases

A voltage source of 20V is applied across the terminals of a 2.5-ohm rheostat. Calculate the power dissipated

in the rheostat?

• 160W

• 100W

• 150W

• 180W

Unit of electrical pressure is

• Watt

• Ampere

• Ohm

• Volt

Two resistors of resistances 5 ohms and 7 ohms are connected in series across a 60-volt source. What is the

power absorbed in the 5-ohm resistor?

• 50W

• 25W

• 125W

• 100W

When using ohms law, E divided by I would solve for

• Watts

• Amperage

• Voltage

• Resistance

In resistance color coding, red color is assigned to a value

• 3

• 0

• 2

• 1

An electric iron takes 3 ½ amps. If the heating element has a resistance of 40 ohms, what is its power

consumption?

• 0.45kW

• 0.49kW

• 0.35kW

• 0.51kW

Another name for a secondary cell

• Wet cell

• Storage cell

• Dry cell

• Disposable cell