Download presentation

Presentation is loading. Please wait.

Published byIrene Gammons Modified over 2 years ago

1
St Columba’s High School Electricity and Electronics Capacitors

2
The ‘coulomb per volt’ is a unit of 1.Charge 2.Energy 3.Capacitance 4.Potential difference :30

3
Capacitors store 1.Current 2.Charge 3.Voltage 4.Power :30

4
Capacitors 1.Block a.c. but pass d.c 2.Block d.c and a.c. 3.Block d.c. but pass a.c. :30

5
An 8 μF capacitor requires 1.1 μ C to charge it to 1 V 2.8 μC to charge it to 8 V 3.8 μC to charge it to 1 V 4.8 C to charge it to 8 μV :90

6
What does the shaded area under the graph represent ? 1.The capacitance of the capacitor 2.The working voltage of the capacitor 3.The charge stored on the plates of the capacitor 4.The energy stored in the capacitor :30

7
What is represented by the gradient of the graph shown ? 1.The energy stored by the capacitor 2.The capacitance of the capacitor 3.The charge stored 4.The Current flowing :30

8
A 500 μF capacitor has a potential difference of 20 V across it. The charge stored is 1.10 μC 2.10 mC 3.50 mC 4.0.04 μC :90

9
The energy stored in a 500 μF capacitor charged to a voltage of 20 V is : :90 1.0.005 J 2.0.05 J 3.0.01J 4.0.1 J

10
A resistor,R, and a capacitor,C are connected in series.Which graphs are correct for the capacitor charging up ? 1.A 2.B 3.C 4.D ABCDABCD :30

11
As the frequency of the supply is increased from 50 to 5000 Hz the reading on the ammeter will : 1.Remain constant 2.Decrease steadily 3.Increase then decrease 4.Increase steadily :30

12
The maximum value of the current flowing is : 1.0 A 2.0.5 mA 3.0.5 A 4.0.005 mA :90

13
If the resistance is increased what happens to the time it takes for the capacitor to charge ? 1.Increases 2.Stays the same 3.Decreases :30

14
A 25 μF capacitor is charged until the pd across it is 500 V. Calculate the charge stored. 1. 5.00 x 10 -8 C 2.2.00 x 10 -5 C 3.1.25 x10 -2 C 4.1.25 x 10 -4 C :90

15
Calculate the energy stored when the pd across the capacitor is 10 V. 1.0.4 mJ 2.2.5 mJ 3.10 mJ 4.20 mJ :90

16
Which answer describes what happens to the bulbs as the frequency is increased but the output voltage remains constant ? 1.P brighterQ unchanged 2.P unchangedQ brighter 3.P dimmerQ unchanged 4.P unchangedQ dimmer :30

Similar presentations

OK

Objectives: 1. Define and calculate the capacitance of a capacitor. 2. Describe the factors affecting the capacitance of the capacitor. 3. Calculate the.

Objectives: 1. Define and calculate the capacitance of a capacitor. 2. Describe the factors affecting the capacitance of the capacitor. 3. Calculate the.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on temples of india in hindi Maths ppt on circles class 10 Ppt on unity in diversity Ppt on union budget 2013 View ppt on iphone Ppt on indian musical instruments Cg ppt online registration 2012 Ppt on bluetooth hacking apps Free ppt on brain machine interface program Free ppt on moving coil galvanometer to ammeter