Free Printable DC Circuits 8

1.

This is the symbol for a...

a)

Light Emitting Diode

b)

Light Dependent Resistor

c)

Fuse

d)

Cell

2.

This is the symbol for a...

a)

Fuse

b)

Wire

c)

Light Emitting Diode

d)

Heater

3.

What is the correct symbol for a LDR (light dependent resistor)?

a)

b)

c)

d)

e)

4.

What does LDR stand for?

a)

Light dependent resistor

b)

Light emitting diode

c)

Light emitter resistor

d)

Light diode resistor

5.

Which of the following is an application of LDR?

a)

Used in light sensitive circuit

b)

Used in heat sensitive circuit

c)

Used in rectifier circuit

d)

Used in amplifier circuit

6.

What is the correct symbol for the LED?

a)

b)

c)

d)

e)

7.

What happens to the resistance of LDR when the light intensity increases?

a)

increases

b)

decreases

c)

does not change

d)

first increases then decreases

8.

What happens to the ammeter reading when the light intensity increases?

a)

increases

b)

decreases

c)

does not change

d)

first increases then decreases

9.

A circuit is set up with an LDR and a fixed resistor as shown. When it is bright, the LDR gives a resistance of 1 kΩ. When it is dark, the LDR gives a resistance of 10 kΩ. What is the voltmeter reading when it is bright?

(Enter your answer without unit)

(a)

10.

A circuit is set up with an LDR and a fixed resistor as shown. When it is bright, the LDR gives a resistance of 1 kΩ. When it is dark, the LDR gives a resistance of 10 kΩ. What is the voltmeter reading when it is dark?

(Enter your answer without unit)

(a)

DC Circuits 8

Total questions: 10

Worksheet time: 10mins

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