Page 688 - SUBSEC October 2017_Neat

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6. A 3V battery of negligible internal Item 8 refers to the following diagram
resistance is connected to six identical which shows a positive point charge in free
resistors as shown in the diagram below. space. The distances from the charge to
points X and Y are shown.

X Y
R R r 4r

Y 8. What is the ratio of the electric field

3V R R strength at X, to the field strength at Y?

X (A) 1:4
(B) 4:1
R R (C) 16:1
(D) 1:16

9. The force per unit charge on a positive
What is the potential difference between test charge placed at a point in a field is
X and Y? called

(A) 1.0V (A) electric energy
(B) 1.5V (B) electric potential
(C) 2.0V (C) dielectric constant
(D) 3.0V (D) electric field strength

7. In a closed circuit or loop, the algebraic Item 10 refers to the following diagram
sum of the e.m.f. is equal to the algebraic
sum of the products of current and resist-
ance.

Which of the following statements is correct? A B

(A) This is Kirchhoff’s first law
which is a consequence of
conservation of energy. 10. Each capacitor in the diagram above has
capacitance C. What is the effective
(B) This is Kirchhoff’s first law capacitance between A and B?
which is a consequence of
conservation of charge. (A) 3C
5
(C) This is Kirchhoff’s second law
which is a consequence of (B) C
conservation of energy. 4

(D) This is Kirchhoff’s second law (C) 5C
which is a consequence of 3
conservation of charge.
(D) 4C

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02238010/SPEC 2017