Physics

Question 1

1Find the total resistance of 4 Ω, 10 Ω and 8 Ω in series.

Easy

A. 320 Ω B. 14 Ω C. 2.11 Ω D. 22 Ω

Question 2

2A p.d. of 9 V is applied across a 3 Ω resistor. Find the current.

Easy

A. 27 A B. 3 A C. 12 A D. 0.333 A

Question 3

3A current of 3 A flows through a 10 Ω resistor. The p.d. across it is ___ V.

Easy

Your answer (fill in the blank)

Question 4

4Resistivity is measured in

Medium

A. ohm per metre B. siemens C. ohm D. ohm metre (Ω m)

Question 5

5A cell of e.m.f. 12 V and internal resistance 0.5 Ω is connected to a 10 Ω resistor. Find the current.

Medium

A. 1.143 A B. 1.2 A C. 24 A D. 1.263 A

Question 6

6Which device does NOT obey Ohm's law?

Medium

A. a metal wire at constant temperature B. a standard resistor C. a constantan wire D. a semiconductor diode

Question 7

7An ammeter is connected

Easy

A. across the supply only B. in series and has a very low resistance C. in parallel and has a high resistance D. in parallel with low resistance

Question 8

8The e.m.f. of a cell is

Medium

A. the current it supplies B. its internal resistance C. the total energy given to each coulomb of charge D. the p.d. across the load only

Question 9

9Adding resistors in parallel increases the total resistance.

Easy

A. True B. False

Question 10

10A p.d. of 240 V is applied across a 6 Ω resistor. Find the current.

Easy

A. 40 A B. 1,440 A C. 246 A D. 0.025 A