WorksheetsElectrical Concepts Quizs
Total questions: 19
Worksheet time: 10mins
Meter used in an electrical installation for recording the energy used?
A kilowatt hour meter
A voltmeter
An ammeter
A power factor meter
Makes use of the magnetic effect of an electric current?
Electric doorbell
Electric fan
Electric heater
Electric toothbrush
Does NOT conduct electricity?
Glass
Copper
Aluminum
Iron
Maximum current drawn by a cooker with 4 x 1.5 kW hot plates, a 2 kW grill, and a 3.5 kW oven supplied from a 230 V AC supply
30A
40A
50A
60A
Not an expression of 1 micrometer
1000000m
0.001m
1e-6m
1000mm
Quantity symbol for Impedance?
Z
R
X
Y
Magnetic effect of an electric current is put to use in a
Transformer
Inductor
Solenoid
Capacitor
Total resistance of a series circuit consisting of three resistors with values of 100Ω, 250Ω, and 350Ω
600Ω
700Ω
800Ω
750Ω
EMF, pd, and voltage are measured using the same unit.
watts
ohms
volts
amperes
Calculate the resistance of a resistor which absorbs 5000W when a current of 15A passes through it.
10 Ω
15 Ω
22.22 Ω
30 Ω
A resistor network with three resistors 9Ω, 3Ω, 2Ω are connected in parallel. What will their combined resistance be?
105 ohms
1.5 ohms
6 ohms
4 ohms
Two values of a right-angled triangle used to calculate the tangent of an angle
Adjacent and Opposite
Hypotenuse and Opposite
Adjacent and Hypotenuse
Opposite and Angle
Resistance of a copper wire if length is halved and cross-sectional area is doubled
1.5Ω
2.0Ω
2.5Ω
3.0Ω
An Electric storage heater uses the heating method of?
Conduction
Radiation
Convection
Induction
If a motor’s input is 75 Watts and its output is 50 Watts, what is the efficiency of the motor?
50%
66.60%
75%
80%
Given the formula: Force (Newtons) = Mass (kg) × acceleration (m/s²), a body is accelerated at 2 m/sec² when a force of 10 Newtons is applied. What is the mass of the body?
3 Kg
4 Kg
5 Kg
6 Kg
Voltage can be present without current.
Voltage can exist in a circuit even if there is no current flowing.
Current can exist without voltage in a circuit.
Voltage and current are always present together in a circuit.
Voltage is the same as current in electrical circuits.
SI unit of measurement symbol for Luminous intensity is cd (candela).
cd (candela)
lm (lumen)
lx (lux)
W (watt)
Statement that is not true
Watts is equal to amps/volts
Watts is equal to volts/amps
Watts is equal to amps times volts
Watts is equal to volts divided by amps
