1) If you comb your hair and the comb becomes negatively charged, then your hair
ID: 1865941 • Letter: 1
Question
1) If you comb your hair and the comb becomes negatively charged, then your hair becomes A) positively charged B) negatively charged C) uncharged 2) When a car is struck by lightning, the resulting electric field inside the car is A) normally huge, but for a brief time B) normally huge for a time longer than the lightning stroke itself. C) small enough to be safe for an occupant inside D) zero. 3) A metal ball hangs from the ceiling by an insulating thread. The ball is attracted to a positive-charged rod held near the ball. The charge of the ball must be A) positive B) negative C) neutral D) positive or neutral E) negative or neutral 4) What charge appears on the plates of a 2.0-uF capacitor when it is charged to 100 V? B) 100 C C) I 50 pC D) 200 uC 5) As more lamps are put into a parallel circuit, the overall current flowing from the battery A) increases B) decreases C) stays the sameExplanation / Answer
1. Hair becomes positively charged
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2. Since car acts as shell at that instant so net wlectric field inside car is zero.
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3.charged ball must be negatively charged in order to attracted by a positive charged rod.
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4.Q= VC= 2*100= 200 uC
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5.
More resistors in parallel , less will be the equivalent resistance of the circuit.
Lower resistance of circuit gives higher value of current for constant potential difference.
Option (a) is correct.
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Comment in case any doubt..goodluck
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