Physics
Current electricity
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#9 The temperature coefficient of resistance is positive for
A) Metals
B) Semiconductors
C) Insulators
D) All of these
Answer: A
#10 The temperature coefficient of resistance is negative for
A) Metals
B) Semiconductors
C) Insulators
D) All of these
Answer: B
#11 If two resistors of resistance R each are connected in series, the equivalent resistance is
A) R
B) 2R
C) R/2
D) 4R
Answer: B
#12 If two resistors of resistance R each are connected in parallel, the equivalent resistance is
A) R
B) 2R
C) R/2
D) 4R
Answer: C
#13 Kirchhoff's first law is based on conservation of
A) Charge
B) Energy
C) Momentum
D) Mass
Answer: A
#14 Kirchhoff's second law is based on conservation of
A) Charge
B) Energy
C) Momentum
D) Mass
Answer: B
#15 The SI unit of electrical power is
A) Watt
B) Joule/second
C) Both A and B
D) Neither A nor B
Answer: C
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