GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 024
231). A transformer is a device for
A). stepping up (or down) dc voltage
B). generating electricity
C). stepping up (or down) ac voltage
D). converting ac into dc
Answer: stepping up (or down) ac voltage
232). In our houses we get 220 V ac. The value 220 represents
A). constant voltage
B). effective voltage
C). average voltage
D). peak voltage
Answer: effective voltage
233). The advantage of ac over dc is that
A). it contains more electrical energy
B). it is free from voltage fluctuations
C). its generation costs much less
D). it can be transmitted over long distances with minimum power loss
Answer: it can be transmitted over long distances with minimum power loss
234). The function of fuse in an electrical circuit is
A). to avoid electric shocks
B). to regulate the flow of current
C). to break the circuit in case of overloading or short-circuiting
D). none of these
Answer: to break the circuit in case of overloading or short-circuiting
235). In an electrical circuit, a fuse is connected
A). in the live wire
B). in the neutral wire
C). in the earth wire
D). anywhere - it makes no difference
Answer: in the live wire
236). lf a fuse blows frequently, one should
A). replace it with a thin wire
B). replace it with a thick copper wire
C). replace it with a paper clip
D). call an electrician
Answer: call an electrician
237). The material used for a fuse wire should have
A). high resistivity
B). high ductility
C). high melting point
D). low melting point
Answer: low melting point
238). One should not connect a number of electrical appliances to the same power socket because
A). this can damage the appliances
B). this can damage the domestic wiring due to overheating
C). the appliances will not get full voltage
D). the appliances will not get proper current
Answer: this can damage the domestic wiring due to overheating
239). An electrical appliance is earthed to
A). protect the appliance against any damage
B). prevent shocks
C). reduce consumption
D). avoid short-circuiting
Answer: prevent shocks
240). An electric bulb has a filament made of
A). copper
B). iron
C). lead
D). tungsten
Answer: tungsten
A). stepping up (or down) dc voltage
B). generating electricity
C). stepping up (or down) ac voltage
D). converting ac into dc
Answer: stepping up (or down) ac voltage
232). In our houses we get 220 V ac. The value 220 represents
A). constant voltage
B). effective voltage
C). average voltage
D). peak voltage
Answer: effective voltage
233). The advantage of ac over dc is that
A). it contains more electrical energy
B). it is free from voltage fluctuations
C). its generation costs much less
D). it can be transmitted over long distances with minimum power loss
Answer: it can be transmitted over long distances with minimum power loss
234). The function of fuse in an electrical circuit is
A). to avoid electric shocks
B). to regulate the flow of current
C). to break the circuit in case of overloading or short-circuiting
D). none of these
Answer: to break the circuit in case of overloading or short-circuiting
235). In an electrical circuit, a fuse is connected
A). in the live wire
B). in the neutral wire
C). in the earth wire
D). anywhere - it makes no difference
Answer: in the live wire
236). lf a fuse blows frequently, one should
A). replace it with a thin wire
B). replace it with a thick copper wire
C). replace it with a paper clip
D). call an electrician
Answer: call an electrician
237). The material used for a fuse wire should have
A). high resistivity
B). high ductility
C). high melting point
D). low melting point
Answer: low melting point
238). One should not connect a number of electrical appliances to the same power socket because
A). this can damage the appliances
B). this can damage the domestic wiring due to overheating
C). the appliances will not get full voltage
D). the appliances will not get proper current
Answer: this can damage the domestic wiring due to overheating
239). An electrical appliance is earthed to
A). protect the appliance against any damage
B). prevent shocks
C). reduce consumption
D). avoid short-circuiting
Answer: prevent shocks
240). An electric bulb has a filament made of
A). copper
B). iron
C). lead
D). tungsten
Answer: tungsten
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