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)

The direction of conventional current is ------------ to electron flow.

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opposite

One unit of coulomb is charge of approximately ------------ protons or electrons.

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6.242 x 10¹⁸

--------- is used to measure the electric current.

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Ammeter

In conducting materials electrons are ------------- bounded with atoms.

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loosely

S.I. unit of Electrical conductivity of a conductor is -----------

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Siemens/meter (S/m)

Electron flow is in the same direction to conventional current flow.

(a) True

(b) False

The fuse wire does not melts whenever there is overload in the wiring.

(a) True

(b) False

In a parallel circuit, the electric components are divided into branches.

(a) True

(b) False

The representation of the electric current is A.

(a) True

(b) False

The electrical conductivity of the semiconductor is in between a conductor and an insulator.

(a) True

(b) False

Cell

(1)

A complete path for the flow of an electric current

Switch

(2)

Used to open or close a circuit

Circuit

(3)

safety device used in electric circuit

Miniature circuit Breaker

(4)

Reset by hand, circuit becomes complete once again

Fuse

(5)

A device which converts chemical energy into electrical energy.