Related Questions

The frequency of the oscillation generated by a magnetron, is mainly determined by
A The flux density of the external magnet
B The ratio of the dc cathode voltage to the magnetic flux density
C The number of the cavity resonators
D The dimension of each cavity resonator
A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will
A increase
B decrease
C remain unaffected
D have its shape changed
তড়িৎদ্বার দুটির বিজারণ বিভব যথাক্রমে -0.76 V এবং +0.80 V । এই তড়িৎদ্বার দুটি দ্বারা তৈরি কোষের মোট বিভব কত? (The reduction potentials of two electrodes same are -0.76 V and +0.80 V, respectively. what is the EMF of a cell constructed using these two electrodes?)
A -0.04 V
B +0.04 V
C -1.56 V
D +1.56 V
A rectangular plot of land has a fence along three of its four sides. The undenced side and the side opposite the unfenced side have a length that is three times thel length of the other two sides. If the area of the plot is 432 square feet, what is the total length id the fence in feet.
A 60
B 72
C 80
D 90
Which type of industries has potentials and prospects in Bihar?
A Oil Refinery
B Forest - based industry
C Sand - mining industry
D Agro - based industry
E More than one of the above
What will happen if the transformers working in parallel are not connected with regard to polarity?
A The power factor of the two trans-formers will be different from the power factor of common load
B Incorrect polarity will result in dead short circuit
C The transformers will not share load in proportion to their kVA ratings
D Cannot be determined
‘Series aiding’ is a term sometimes used to describe voltage sources of the same polarity in series.
A True
B False
When measuring AC (Alternating Current) with a multimeter, it is important to maintain the proper polarity.
A True
B FALSE
C MEM /C
D SYS:
E None of the above
To determine the polarity of the voltage drop across a resistor, it is necessary to know
A Value of current through the resistor
B Direction of current through the resistor
C Value of resistor
D E.m.f. in the circuit
The polarity of the induced voltage can be determined by using the left-hand generator rule.
A Yes
B No

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