Electrical science basic equations

If the amount of work done by a force of 100N is 950Nm calculate the distance the object has moved.

• 95m

• 9.5m

• 9500cm

• 950cm

Calculate the power required to move a weight of 400N through a vertical distance of 6.5m in 5 seconds.

• 5101.2 watts

• 1.3 Kilo watts

• 307.69 watts

• 520 watts

A crowbar is used to lift a packing case with load of 500N, the load is 300mm from the fulcrum and the place effort is being placed is 1.5m from the fulcrum determine the effort required to life the packing case

• 100N

• 100KN

• 2.5KN

• 2.5N

A pulley system with 4 pulleys is shown to lift a 1250kg load determine the effort in newtons required to lift this object.

• 3065.63N

• 312.5N

• 5000N

• 509.68N

• 7.86 ohms

• 3.76 ohms

• 0.38 ohms

• 325 ohms

Two cables have equal resistance but on has a csa four times larger than the other what is different with the length of the thicker cable than the thinner cable?

• double the length

• 1/2 the length

• 4 times smaller

• 4 times larger

what is the potential voltage of a circuit if it has a resistance of 20 ohms and 15 amps is flowing through it?

• 300volts

• 1.33v

• 0.75v

• 750v

A cable has a resistance of 0.55 ohms and carries a current of 143.56 amps what will be the voltage drop in the cable?

• 3.83 v

• 78.96 v

• 261.02 v

• 3.83 KV

How many resistors of 0.76 ohms must be connected in series to give a total resistance of 4.46 ohms

There are four resistors in a series with a total resistance of 85 ohms if 3 of the resistors are valued as 5 ohms 10 ohms and 15 ohms what is the value of the final resistor?

• 2.83 ohms

• 10 ohms

• 55 ohms

• 30 ohms