n a specimen of cast iron, a field strength of 400 AT/m cause a flux density of 0.6 T. In a specimen of silicon steel, the same value of H would cause B to be

A)
0.6 T
B)
less than 0.6 T
C)
more than 0.6 T
D)
0.6 T or less than 0.6 T

Correct Answer : Option (D) :   0.6 T or less than 0.6 T

Explanation : Since μr for silicon steel is more than that of cast iron, flux density will be more than 0.6 T.

Recently Updated in Networks Analysis and Synthesis Questions
Ohm's law is valid for
A)
dc voltage and current
B)
ac voltage and current
C)
dc and ac voltages and currents
D)
all voltages and current

Correct Answer :   all voltages and current

Explanation : KCL and KVL are valid for voltages and currents of all wave shapes during transient as well as steady state conductions.

If e = 110 sin (ωt + p/3) and i = 5 sin (ωt - p/3), the impedance of the circuit is
A)
 
11 Ω
B)
16 Ω
C)
22 Ω
D)
30.8 Ω

Correct Answer :   22 Ω

Explaination :

Two phasors having rms values V1 and V2 which are added to give a phasor having rms value V3. V3 is maximum if phase angle between V1 and V2 is
A)
 
90°
B)
 
180°
C)
 
270°
D)
 
360°

Correct Answer :  

 
360°

Explaination : Sum of phasors is maximum if they are in phase and 360° = 0.

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