Page 687 - SUBSEC October 2017_Neat

- 3 -

1. A 3V battery causes a current of 0.5 A to 4. The variable resistor is adjusted to provide
flow along a wire for 4 seconds. What is a smaller resistance. Which changes BEST
the quantity of charge that passes in this describe the changes in the ammeter and
time? voltmeter readings?

(A) 0.125 C Ammeter Voltmeter
(B) 1.5 C Reading Reading
(C) 2 C (A) decrease increase
(D) 6 C
(B) decrease decrease
(C) increase increase
2. Energy per unit of charge is a measure of (D) increase decrease

(A) power
(B) capacitance 5. The cell in the following diagram has an
(C) electric field strength e.m.f of 9.0V. The reading on the high
(D) potential difference resistance voltmeter is 5.0V.

3. A current of 0.25 A flows in a uniform
wire of length 2 metres and cross-
sectional area 2 x 10 m , when the
2
-9
potential difference across the wire is
4.25 V. What is the resistivity of the I V
material from which the wire is made?

(A) 5.9 x 10 Ωm 17Ω
-11
(B) 4.25 x 10 Ωm
-9
(C) 1.7 x 10 Ωm
-8
(D) 3.4 x 10 Ωm
-8
What is the current I?
Item 4 refers to the following diagram
which shows an arrangement of electrical (A)
components in a circuit.

(B)

A (C)

(D)
V

GO ON TO THE NEXT PAGE
02238010/SPEC 2017