Resistive Circuits

Question 1

What 3 equations do we use to calculate power

A) a Resistor has a power rating of 0.063W and a resistance of 100 ohms what is the max voltage that can be applied

A) a Resistor has a power rating of 72w and a resistance of 4700 ohms what is the max voltage that can be applied

Answer 1

Question 2

how do you calculate resistivity

Answer 2

Question 3

Derive the gain for the following circuit

Answer 3

Question 4

How do you compensate for non-ideal behaviour of a resistive circuit

Answer 4

Question 5

Answer 5

Question 6

What is the piezo-resistive effect?

Answer 6

Question 7

What changes in resistance are experienced by the Two strain gauges

Answer 7

A Strain gauge must be mounted in a way that the active axis is inline with the direction being measured

Question 8

How do you calculate gauge factor

Answer 8

Question 9

Draw a Lateral Load cell

Answer 9

Question 10

Draw a Load cell that measured torque

Answer 10

Question 11

How do you calculate change in resistance in load cell

In terms of Force, Young’s modulus , Area Gauge factor and nominal resistance

Answer 11

Question 12

How do you calculate change in resistance in load cell

Answer 12

Question 13

Explain a problem with stain gauges

Answer 13

Change in resistance can be very low,
small difference in voltage
Requires an op amp

Question 14

Derive the change in voltage of a Wheatstone bridge

Answer 14

Question 15

What is a 1/4 bridge

Name problem with a 1/4 bridge

Answer 15

Question 16

Answer 16

Question 17

Answer 17