MCQ Class 7 Science Chapter 10 Electric Current and its Effects Advertisement MCQ’s For All Chapters – Science Class 7th 1. In making a batterypositive terminal of one cell is connected to the negative terminal of the next cellpositive terminal of one cell is connected to the positive terminal of the next cellnegative terminal of one cell is connected to the negative terminal of the next cellnone of the aboveQuestion 1 of 102. Where can the key or switch be placed in the circuit?Left side of the batteryRight side of the batteryCan be placed anywhere in the circuitNear the positive terminal of the bulbQuestion 2 of 103. Which one of the following is based on the heating effect of current?GeyserHair dryerImmersion rodAll of theseQuestion 3 of 104. The coil of wire contained in an electric heater is known ascomponentelementcircuitspringQuestion 4 of 105. The amount of heat produced in a wire depends onmateriallengththicknessall of theseQuestion 5 of 106. Which mark is necessary on electric appliances?AGMARKISIFICCIKSKQuestion 6 of 107. When an electric current flows through a copper wire AB as shown in Figure, the wire deflects a magnetic needle placed near itbecomes red hotgives electric shockbehaves like a fuseQuestion 7 of 108. Choose the statement which is not correct in the case of an electric fuse.Fuses are inserted in electric circuits of all buildings.There is a maximum limit on the current which can safely flow through the electric circuits.There is a minimum limit on the current which can safely flow in the electric circuits.If a proper fuse is inserted in a circuit it will blow off if current exceeds the safe limit.Question 8 of 109. When a switch is in OFF position. (i) circuit starting from the positive terminal of the cell stops at the switch. (ii) circuit is open. (iii) no current flows through it. (iv) current flows after some time. Choose the combination of correct answer from the following:all are correct(ii) and (iii) are correctonly (iv) is correctonly (iv) is correctQuestion 9 of 1010. Which of the following precautions need not be taken while using electric gadgets / appliances/circuit?We should never touch a lighted electric bulb connected to the mains.We should never experiment with the electric supply from the mains or a generator or an inverter.We should never use just any wire or strip of metal in place of a fuse.We should never turn the switch in ON position.Question 10 of 10 Loading...
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