In DC potentiometer measurments, a second reading is often taken after reversing the polarities of the DC supply and the unknown voltage and the average of the two reading is taken. This is with a view of eliminate the effects of

Measurement and Instrumentation
In DC potentiometer measurments, a second reading is often taken after reversing the polarities of the DC supply and the unknown voltage and the average of the two reading is taken. This is with a view of eliminate the effects of

Stray thermal emfs.

Stray magnetic fields.

Errorneous standardisation.

Ripples of the DC supply.

Stray thermal emfs.

Stray magnetic fields.

Errorneous standardisation.

Ripples of the DC supply.

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Measurement and Instrumentation
For power measurement of three phase circuit by two wattmeter method, when the value of power factor is less than 0.5 lagging

Both give the same readings

Pressure coil of the wattmeter will become ineffective.

One of the wattmeters will read zero

One of the wattmeter connections will have to be reversed

Both give the same readings

Pressure coil of the wattmeter will become ineffective.

One of the wattmeters will read zero

One of the wattmeter connections will have to be reversed

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Measurement and Instrumentation
A DC potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18 V obtains balances at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of test cell is

1.5 V.

1.34 V.

1.7 V.

1 V.

1.5 V.

1.34 V.

1.7 V.

1 V.

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Measurement and Instrumentation
An induction wattmeter can be used for

Ac only

Both DC and AC

Dc only

Any of the listed here

Ac only

Both DC and AC

Dc only

Any of the listed here

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Measurement and Instrumentation
A CRO probe has an impedance of 500 kΩ in parallel with a capacitance of 10 pF. The probe is used to measure the voltage between P and Q as shown in figure. The measured voltage will be

4.38 V.

5 V.

4.54 V.

3.53 V.

4.38 V.

5 V.

4.54 V.

3.53 V.

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Measurement and Instrumentation
The quantity 1/√(∈0 × μ0) in SI units has the

none of these.

speed of light.

both ‘a’ and ‘b’.

dimension LT-1.

none of these.

speed of light.

both ‘a’ and ‘b’.

dimension LT-1.

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Measurement and Instrumentation

Measurement and Instrumentation In DC potentiometer measurments, a second reading is often taken after reversing the polarities of the DC supply and the unknown voltage and the average of the two reading is taken. This is with a view of eliminate the effects of

Measurement and Instrumentation For power measurement of three phase circuit by two wattmeter method, when the value of power factor is less than 0.5 lagging

Measurement and Instrumentation A DC potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18 V obtains balances at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of test cell is

Measurement and Instrumentation An induction wattmeter can be used for

Measurement and Instrumentation A CRO probe has an impedance of 500 kΩ in parallel with a capacitance of 10 pF. The probe is used to measure the voltage between P and Q as shown in figure. The measured voltage will be

Measurement and Instrumentation The quantity 1/√(∈0 × μ0) in SI units has the

Measurement and Instrumentation
In DC potentiometer measurments, a second reading is often taken after reversing the polarities of the DC supply and the unknown voltage and the average of the two reading is taken. This is with a view of eliminate the effects of

Measurement and Instrumentation
For power measurement of three phase circuit by two wattmeter method, when the value of power factor is less than 0.5 lagging

Measurement and Instrumentation
A DC potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18 V obtains balances at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of test cell is

Measurement and Instrumentation
An induction wattmeter can be used for

Measurement and Instrumentation
A CRO probe has an impedance of 500 kΩ in parallel with a capacitance of 10 pF. The probe is used to measure the voltage between P and Q as shown in figure. The measured voltage will be

Measurement and Instrumentation
The quantity 1/√(∈0 × μ0) in SI units has the