20 Questions | Total Attempts: 117  Settings  There are 20 questions. If you score above 14/20, you will be allocated to SUPER EXPRESS path. If you score 14/20 and below, you will be allocated to EXPRESS path.

• 1.
One ______is the p.d. across a load if the work done to bring 1 C ofpositive charge across the load is 1 J.
• A.

Ohm

• B.

Ampere

• C.

Volt

• D.

None of the above

• 2.
To transfer 2.0C of charge from point A to B (where its potentialdifference is 4.0 V) in a circuit. How much energy is needed?
• A.

2.0 J

• B.

6.0 J

• C.

0.50 J

• D.

8.0 J

• 3.
4.0 J of electrical energy is converted to thermal energy when 6.0 C ofcharges pass through a resistor. What is the potential difference across the resistor?
• A.

0.67V

• B.

1.5V

• C.

24V

• D.

Cannot be determined due to lack of information

• 4.
This simplified diagram represents a cyclic movement of water where there is a pump, P, to pump water up to a higher level reservoir. The water flows down to the bottom reservoir, which is then again pumped up. Now imagine that this can represent an electric circuit. Where is the “resistor”?
• A.

The pump

• B.

The bottom reservoir

• C.

The part where the water fall through the pipe

• D.

The end of the pipe where the water gushes out into the bottom reservoir

• 5.
This simplified diagram represents a cyclic movement of water where there is a pump, P, to pump water up to a higher level reservoir. The water flows down to the bottom reservoir, which is then again pumped up. Now imagine that this can represent an electric circuit. How would you measure the “current” of this “circuit”?
• A.

Measure the rate of water flow

• B.

Measure the weight of the water

• C.

Measure the density of the liquid used

• D.

Measure the amount of energy required by the pump to pump the water up

• 6.
The carriers of a current in a wire are electrons. Each electron carries 1.6 x 10-19C of charge. The number of electrons per second passing any section of a wire carrying a current of 0.8 A is
• A.

3 x 10^18

• B.

5 x 10^18

• C.

8 x 10^18

• D.

8 x 10^19

• 7.
This simplified diagram represents a cyclic movement of water where there is a pump, P, to pump water up to a higher level reservoir. The water flows down to the bottom reservoir, which is then again pumped up. Now imagine that this can represent an electric circuit. What is analogous to the water in an electric circuit?
• A.

Conventional Current

• B.

Electron

• C.

Electromotive force

• D.

Potential difference

• 8.
This simplified diagram represents a cyclic movement of water where there is a pump, P, to pump water up to a higher level reservoir. The water flows down to the bottom reservoir, which is then again pumped up. Now imagine that this can represent an electric circuit. Identify the positive pole of the “battery” in this diagram
• A.

The left hand side of the top reservoir

• B.

The top part of the pump

• C.

The bottom part of the piping where the water flow from the top reservoir to the bottom

• D.

The right hand side of the bottom reservoir

• 9.
This simplified diagram represents a cyclic movement of water where there is a pump, P, to pump water up to a higher level reservoir. The water flows down to the bottom reservoir, which is then again pumped up. Now imagine that this can represent an electric circuit. Which part of the diagram will represent the battery?
• A.

The top reservoir

• B.

The pump

• C.

The piping

• D.

The bottom reservoir

• 10.
For a solid conductor, what is the name of the particle that carries a chargeand hence creates current call?
• A.

Electron

• B.

Proton

• C.

Neutron

• D.

None of the above

• 11.
Which of the following represent a light bulb?
• A.

I

• B.

Ii

• C.

Iii

• D.

Iv

• 12.
Which of the following represent a light emitting diode (LED)?
• A.

I

• B.

Ii

• C.

Iii

• D.

Iv

• 13.
______ is defined as the energy converted from electrical to other forms when one coulomb of electrical charge passes between the two points.
• A.

Current

• B.

Potential difference between any 2 points

• C.

Electromotive force

• D.

Resistance

• 14.
A current of 3.0 A flows through the filament of a torch bulb for half a minute. What is the amount of charge that flow through the filament during this time?
• A.

1.5 C

• B.

10 C

• C.

6.0 C

• D.

90 C

• 15.
A charge of 2C takes 4s to flow from one point to another in a circuit.  The magnitude of this current flow is ______A?
• 16.
The diagram shows a resistor connected to a cell of e.m.f. 2.0 V What is the current flowing through this circuit?
• A.

2.5 A

• B.

10 A

• C.

0.4 A

• D.

7.0 A

• 17.
The diagram shows a resistor connected to a cell of e.m.f. 2.0 V How much thermal energy is produced in the resistor in 6.0 s?
• A.

4.8 J

• B.

20 J

• C.

0.8 J

• D.

5.0 J

• 18.
The diagram shows a resistor connected to a cell of e.m.f. 2.0 V       How much energy would the cell have lost durings6.0 s?
• A.

4.8 J

• B.

20 J

• C.

0.8 J

• D.

5.0 J

• 19.
• A.

3 Ω

• B.

12 000 Ω

• C.

3000 Ω

• D.

2000 Ω

• 20.
Which graph represents an ohmic conductor ?
• A.

I

• B.

Ii

• C.

Iii

• D.

Iv

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