Assertion (A): A hot wire ammeter has a cramped scale.Reason (R): Th – McqOptions

MCQOPTIONS

1.	Assertion (A): A hot wire ammeter has a cramped scale.Reason (R): The heat is proportional to square of current.
A.	Both A and R are true and R is correct explanation of A
B.	Both A and R are true but R is not correct explanation of A
C.	A is true R is false
D.	A is false R is true
Answer» B. Both A and R are true but R is not correct explanation of A

Discussion

No Comment Found

Related MCQs

The accuracy of measurement by ohmmeter is very good.
The moving iron instruments are generally repulsion type.
Assertion (A): Many instruments use eddy current damping.Reason (R): Eddy currents set up a magnetic flux which opposes the original movement which generates them.
The angle δ for a mica capacitor is about
A meter has a square law scale. For 2 A current the deflection in 90°. For a deflection of 45°, the current is
Two voltmeters 0-250 V each having resistances of 5 k&ohm; and 10 k&ohm; respectively and are connected in series. To ensure that neither of them goes beyond scale the total voltage which can be applied should be less than
Two ammeters having resistances of 0.5 &ohm; and 0.25 &ohm; and having full scale reading of 25 A each are connected in parallel. To ensure that neither of them goes beyond scale, the total current should not be more than
A 0-200 V voltmeter has a sensitivity of 1 k&ohm; per volt. The resistance of voltmeter is
Which of the following voltmeters would you use for measuring voltage across 20 k&ohm; resistance?
Two ammeters A and B both 0-10 A have internal resistance of 1 &ohm; and 0.5 &ohm; respectively. They are connected in parallel. If total current is 15 A, then