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WorksheetsElectromotive
Total questions: 15
Worksheet time: 8mins
Which converts chemical energy to electrical energy?
a. Alkaline and copper.
b. Acid and copper.
c. Cells and batteries.
d. Negative and positive.
Which converts mechanical energy into electrical energy by means of electromagnetic induction?
a. Oscillators
b. Generators
c. Terminators
d. Incubators
Friction between certain materials produces electrical energy, what type of energy is it?
a. Static electricity
b. Rubbing electricity
c. Friction electricity
d. Contact electricity
What type of energy converts light energy into electrical energy?
a. Piezo electric
b. Static electricity
c. Photo electric
d. Thermocouple
Thermocouple:
a. Converts water into electrical energy.
b. Converts heat energy into electrical energy.
c. Converts pressure into electrical energy.
d. Converts light into electrical energy.
What is an example of a primary cell?
a. Carbon-Fibre
b. Carbon-Zinc
C. Carbon-dioxide
d. Carbonate
What is an example of a secondary cell?
a. Iron
b. Copper
c. Aluminium
d. Lead-acid
What is this?
a. Alternator
b. Grinder
c. Generator
d. Starter motor
What does the image show?
a. Engine
b. Generator
c. Air compressor
Alternator
What are thermocouples used for?
a. Area measurement
b. Pressure measurement
c. Altitude measurement
d. Temperature measurement
What intrument or tool is used when measuring a specific gravity?
a. Hydraulic meter
b. Hydro meter
c. Scale
d. Thermometer
What is an electromotive force?
The force which causes charge to flow in an electrical circuit.
b. The force which causes voltage to flow in an electrical circuit.
c. The force which causes current to flow in an electrical circuit.
None of these
One dry cell with e.m.f value of 2V and internal resistance 1Ω is connected to one resistor 4Ω.
a. 0.5A
b. 0.4A
c. 2.0A
d. 2.5A
Electromotive = potential + voltage
force difference loss
E = V + v
E = V + Ir
Internal resistance, r = ?
a. (E – V)
2I
b.(V – E)
I
(E – V)
I
(I – V)
E
Which statement is FALSE about EMF?
a. There is voltage that flow in the circuit. voltmeter readings = p.d across resistance
b. Energy supply by a source to transfer a unit charge from one terminal to another terminal
c. There is current flow in the circuit. voltmeter readings = p.d across resistance
d. No current flow in the circuit, voltmeter readings = e.m.f
