In the circuit diagram below, 10 units of electric charge move past point x every second What is the current in the circuit _______

(a)

10 A

(b)

1 A

(c)

10 V

(d)

1 V

In the circuit shown, which switches (L, M or N) must be closed to light up the bulb?

 

(a)

switch L only

(b)

switch M only

(c)

Switch M and N only

(d)

either switch L or switches M and N

Small amounts of electrical current are measured in milliampere (mA). How many milliampere are there in 0.25 A ?

(a)

2.5 mA

(b)

25 mA

(c)

250 mA

(d)

2500 mA

In which of the following circuits are the bulb connected in series?

(a)

(b)

(c)

(d)