Prog Mock

What is Ohms Law?

• P=IxR

• V=I/R

• V=IxR

• P=IxV

• R=PL/A

Which 3 elements are used in the power triangle?

• Resistance

• Volts

• Resistivity

• Current

• Watts

Transpose the formula A = B - C to make B the subject

• B = A - C

• B = C - A

• B = A + C

• B = A x C

If a resistor is rated at 200 milliohms, what is that in ohms?

• 2 ohms

• 0.2 ohms

• 0.002 ohms

• 0.0002 ohms

What resistance is given by a lamp using 6A of current on a 400v supply?

• 406 ohms

• 66.6 ohms

• 2400 ohms

• 0.015 ohms

There are 3 resistors connected in parallel in a circuit with a resistance of 3 ohms each. What is the total circuit resistance?

• 9 ohms

• 27 ohms

• 0.33 ohms

• 1 ohm

There are 2 resistors connected in series, a 3 ohms resistor and a 4 ohm resistor. Which of the following quantities has the same value in each resistor?

• Power

• Current

• Voltage

• Resistance

A circuit has 4 resistors connected in series. The total resistance will be:

• Less than the smallest resistor

• Less than the largest resistor but more than the smallest

• More than the largest resistor

• More than the smallest resistor but less than the largest

What is the length of a 4mm² aluminium conductor that has a resistivity of 0.0265 microohms/metre and a resistance of 0.53 ohms?

• 80 Metres

• 8 Metres

• 0.8 Metres

• 800Metres

How much power is used by a 16A appliance operating at 230v?

• 3.68kw

• 14.38kw

• 0.07kw

• 246kw