Free Printable Electrical Scientific Principles 202

Worksheets

Electrical Scientific Principles 202

Total questions: 30

Worksheet time: 23mins

Name

Class

Date

What Is The Frequency used In The UK

50hz

60hz

55hz

70hz

What current is produced if we have a 230v supply with an appliance of 1500w?

1000A

2.9A

6.5A

13A

What size conductor is typically used for sockets in a domestic dwelling?

1.5mm

2.5mm

4mm

0.75mm

If we have a motor with 50% efficiency but at 100% efficiency needs 3KW, What power will it draw?

3Kw

2Kw

2.5Kw

6Kw

What frequencies are most electrical items made to be compatible with?

50hz

60hz

55hz

65hz

What is the correct formulas for calculating amperes?

V $\div$ I

V $\div$ R

P $\div$ V

I $\div$ R

What is one effect caused by electrical current?

(a)

What potential is produced across a resistance of 15 ohms if a current of 12 amperes are flowing through it?

230V

240V

200V

180V

What is the current flowing in the circuit when 198 volts is present across a resistance of 3.3 ohms?

50A

57A

60A

59A

10.

Four resistors in series have a voltage drop across them of 37V, 55V, 29V & 119V calculate the supply voltage.

230V

250V

240V

300V

11.

A joint in a cable has the resistance of 0.0428 ohms. Calculate the power developed in the joint when a current of 30 amperes is flowing in the cable.

37.76W

38.52W

38.54W

37.98W

12.

Calculate the power loss in a cable of 0.27 ohms when a current of 36 amperes is flowing.

349.92W

226W

225W

349.96W

13.

Calculate the weight of a car weighing 1.8 metric tons when subjected to earths gravity.

17659N

17653N

17658N

17586N

14.

Calculate the weight of a car weighing 1.74 metric tons when subjected to the moons gravity.

2822N

2822.28N

2282.82

2228.28

15.

Calculate the mass of a car having a weight of 15,500N when subjected to the earths gravitational force.

1600Kg

1500Kg

1600.02Kg

1580.02Kg

16.

Calculate the work done by a force of 240N moves an object 2.9m

696Nm

688Nm

704Nm

703Nm

17.

What is Fleming's left hand motor rules?

Voltage

Electromagnetic field

Direction of force / motion

Current

18.

How can the direction of rotation be changed on a single phase capacitor start induction motor?

Add a capacitor in parallel to the supply

Reverse the supply connections to the motor

Reverse the capacitor connections

Reverse the connections to the start winding

19.

A sine wave has a RMS voltage of 110v; calculate the peak voltage.

155.56v

165.5v

155.65v

165.4v

20.

Under what fault conditions would a RCD operate?

Open circuit in an earth conductor

Phase to earth fault

Open circuit fault in a phase conductor

Phase to neutral fault

21.

Which earthing arrangement uses a copper rod?

TNCS

TNS

22.

If a kettle has a supply voltage of 230V and a power of 3000W, what would the current be?

(a)

23.

Calculate the mass in Kg of a rocket on the moon when the rocket has a weight of 26,578N.

43 Tons

43.109Kg

43109.516Kg

43.109516 Tons

24.

A sine wave has a peak voltage of 230V; calculte the rms value.

162.63V

70.71V

174.69V

84.77V

25.

A sine was has a peak voltage of 400V; calculate the average value.

258.4

246.7

265.3

254.8

26.

A sine wave has a RMS of 400V; calculate the peak voltage

565.95V

655.95V

565.69V

695.96V

27.

What is the value of this resistor?

1K Ohms

2K Ohms

270 Ohms

370 Ohms

28.

Name the two main parts of the atom.

Proton

Neutron

Matter

Electron

29.

The voltage drop in a cable carrying 13 amperes is 3.7 volts, calculate the power wasted in the cable.

41.6W

56.4W

48.1W

18.4W

30.

If a coil of cable, 50m in length, has a conductor resistance of 0.357 ohms, calculate the value for 700m of the same cable.

4.998 Ohm

4.898 Ohms

5 Ohms

4.99 Ohms

Reset

Electrical Scientific Principles 202

Total questions: 30

Worksheet time: 23mins

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