General Physics Questions And Answers, Set 67

 

General Physics Questions And Answers

Q1. 

Which error is removed when the known and unknown resistances are interchanged in a Meter Bridge?

Ans.

End error

Q2. 

How many resistances are used in a Wheatstone bridge?

Ans.

4

Q3. 

Which instrument is used as the null detector in the Wheatstone bridge?

Ans.

Galvanometer

Q4. 

The equation of a balanced Wheatstone bridge is PR = QS.

Ans.

False

Q5. 

Identify the definition of sensitivity of a galvanometer from the following.

Ans.

Ratio of deflection in the galvanometer to the unit change in unknown resistance

Q6. 

Identify the type of materials which have resistivities in the range of 10-8 Ωm to 10-6 Ωm.

Ans.

Conductors

Q7. 

Which of the following is a widely used variety of commercial resistor?

Ans.

Wire-bound resistor

Q8. 

Identify the wrong statement describing the color code for carbon resistors.

Ans.

The third band indicates the third significant figure

Q9. 

If the fourth band of the carbon resistor is absent, it implies there is no tolerance.

Ans.

False

Q10. 

‘X’ is a type of commercial resistor made from a mixture of clay, carbon black, and resin binder which are pressed and then molded into cylindrical rods by heating. Identify X.

Ans.

Carbon resistors

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