Which of the following is not a neutral refractory?
9. Which of the following is not a neutral refractory?
o Silicon carbide
o Chromite
o Graphite
o Magnesite
Ans: D
o Silicon carbide
o Chromite
o Graphite
o Magnesite
Ans: D
In the circuit shown, the ammeter reads 1 ampere and voltmeter 10 volts. The internal resistance of the ammeter is 1 ohm and that of voltmeter is 50 ohms. The value of R is _______.
(a) 111 .2 ohms (b) 120 ohms (c) 100 ohms (d) 112 ohms Ans: D
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