Page 2 - X-CBW-ELECTRICITY

B. The current will increase because the resistance of copper decreases with
an increase in temperature.
C. The current will decrease because the resistance of copper increases with
an increase in temperature.
D. The current will decrease because the resistance of copper decreases
with an increase in temperature.
5. Priya has three resistors each of resistance 2 Ω. Which of the following 1
resistances will she NOT be able to get by combining these resistors is
different combinations?
A. 0.67 Ω
B. 0.75 Ω
C. 3 Ω
D. 6 Ω
6. A cylindrical copper wire X of length l and radius r has a resistance R and 1
resistivity ρ. Another copper wire Y has a length 2l and a radius 2r. Which of
the following rows in the table shows the correct resistance and resistivity
of the copper wire Y?

A. I
B. II
C. III
D. IV
7. The variable resistor R is connected in a circuit, as shown below. A variable 1
resistor is one whose resistance can be changed.

The resistance of R is increased. What will happen to the voltmeter readings
V1 and V2?
A. V1 increases; V2 increases
B. V1 increases; V2 decreases
C. V1 decreases; V2 increases
D. V1 decreases; V2 decreases