Class 7 Science MCQs - Chapter 7

Electrical Circuits and Electric Currents Multiple Choice Questions (MCQ) PDF - 18

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Electrical Circuits and Electric Currents Questions & Answers PDF Download: MCQ Quiz 18

MCQ 86: Radio, TV, CD Player and sound system have

loudspeakers
microphones
antennas
cathode tubes

MCQ 87: A part of an electric circuit which is used to limit the amount of electric current flowing through the circuit is known as

diode
thermistor
radiator
resistor

MCQ 88: The slowing down of electrons depends upon

material
mass of conductor
volume of conductor
length of conductor

MCQ 89: When water is electrolyzed, the gas collected at cathode, is

sulphur
oxygen
hydrogen
sulphur dioxide

MCQ 90: For protection of electrical appliances

resistors can be used
fuses can be used
thick wires can be used
thin wires can be used

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