17. (a) Define the unit of resistance (or Define the unit "ohm").
(b) What happens to the resistance as the conductor is made thinner?
(c) Keeping the potential difference constant, the resistance of a circuit is doubled. By how much does the
current change?
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Answer:
A The ohm (symbol: Ω) is the SI derived unit of electrical resistance, named after German physicist Georg Ohm.
B when the conductor is made thinner, its area of cross-section will decrease, since resistance is inversely proportional to the area of the conductor. Therefore, its resistance will increase.
C If the voltage is constant, the resistance is doubled and the current becomes half.
Explanation:
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