S3 Electricity

5 (1 rating)

by Graham Case

| 17 QuestionsNote from the author:

Heat

1

1

Which image shows the correct placement of the measuring devices?

A

B

C

D

2

1

Use the diagram below to deduce the charges of A and B.

A is positive, B is positive

A is positive, B is negative

A is negative, B is positive

A is negative , B is negative

3

1

A resistor has a potential difference of 12V across it and a current flowing through it of 2A. What is the Power dissipated in the resistor?

24W

6W

24J

6J

4

1

Which of the following graphs of Current against Potential Difference represents an Ohmic Conductor?

A

B

C

D

5

1

A current of 2A flows through a conductor. How much charge flows through the conductor in 2 minutes?

1C

4C

60C

240C

6

1

Decide which arrangement of resistors gives the highest Total Resistance.

A

B

C

D

7

1

An electrical heater is rated P =1250W, V= 110V. Which fuse would be the most appropriate to use?

3 Amp fuse

5 Amp fuse

9 Amp fuse

13 Amp fuse

8

1

In an electrical circuit, the conventional direction for current is always from the positive terminal of a battery to the negative terminal, however, the electrons flow in the opposite direction.

True

False

9

1

The resistance of a lamp decreases with increasing voltage, as this causes the temperature of the filament to increase.

True

False

10

1

What is the total resistance of a 12 Ohm resistor and a 4 Ohm resistor when connected in parallel?

48 Ohms

16 Ohms

3 Ohms

0.33 Ohms

11

1

Electrons flow in a given direction in a complete electrical circuit since the emf of a battery provides an electrical field in the wires.

True

False

12

1

What is the emf of a battery if 12 Coulombs of charge gain 48 Joules of energy when they pass through the terminals of the battery.

0.25 V

4.0 V

12 V

576 V

13

1

In a series circuit consisting to two resistors, the voltage across each resistor is the same as the voltage across the battery.

True

False

14

1

Potential difference is another name for voltage, and is measured in volts.

True

False

15

1

When a polythene rod is rubbed with a cloth, it becomes negatively charged as protons are transferred from the rod to the cloth due to friction.

True

False

16

1

If a component is Ohmic, that means that the current flowing through the component is directly to the voltage across it. This means that the resistance of the component stays the same.

True

False

17

1

An LDR can be used to detect light conditions because the resistance of an LDR increases with increasing light intensity.

True

False

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