AIIMS CRE Electrical JE/AE Mock Test- 9 - NEET MCQ

The internal resistance 10Ω of a voltage source is and has 10 volts at its terminals. Find the maximum power that can be transferred to the load.

The Req for the circuit shown in figure is

A 3-phase induction motor is connected to a supply of normal voltage. The e.m.f. induced between the slip rings at standstill is 72 V and the resistance and standstill reactance/phase are 0.5 Ω  and 3.5 Ω  respectively. The rotor is joined to a star-connected resistance of  4 Ω/phase. The rotor phase current at starting will be

A 100 kVA, 2200/440 V transformer has primary values  R₁=0.3 Ω, X₁=1,1 Ω and secondary  
R₂=0.01Ω and X₂=0.035 Ω.values  and  What are the total copper losses?

The superposition theorem is used when the circuit contains-

The inductance of a moving iron instruments is given by L=100+4θ-θ2mH. If spring constant = 8×10^-3  then find deflection for a current of 4A –

A choke is used as a resistance in-

What is the device used to measure power known as?

The multiplier and the meter coil in a voltmeter are in-

To minimise the errors due to lead and contact resistances, low resistances used in electrical measurement work are provided with-

For n-type semiconductor, the doping material is-

Value of leakage reactance of synchronous machine is-

The ratio of number of carriers in germanium to that of silicon is-

What percent of total operating cost, fuel purchasing and handling is-

If 750 is flowing through the resistance, what is the voltage drop across the resistor?

Mutual inductance between two coils is 4H. If the current in one coil changes at the rate of 2 A/sec, then emf induced in the other coil is?

If the percentage reactance of the system upto fault point is 20% and base kVA is 10,000 then short-circuit kVA is

Figure shows the single line diagram of a 3-phase transmission line. The three phase short-circuit fault (i.e. symmetrical fault) will be

To prepare P-type semiconducting materials, the impurities to be added to silicon are-

If two capacitances C₁ and C₂ are connected in parallel, then the equivalent capacitance is given by-

A wattmeter is marked 15A/30A, 300V/600V, and its scale is marked up to 4500 watts. When the meter is connected for 30A, 600A, the point indicated 2000 watts. The actual power in the circuit is-

Compared to the beaking capacity of a circuit breaker, its making capacity should be-

In an ac circuit, V and I = (30-j10)A. The active and reactive power of the circuit are, respectively.

Which one of the following is a speed control method of their phase squirrel cage induction motor?

A transistor is operating in common emitter mode, as shown in the figure given below. The voltage (V_CE) is-

In a transformer, the core loss is found to be 46W at 50 Hz and is 80 W at 70 Hz, both losses being measured at the same peak flux density. The hysteresis loss and eddy current loss at 60 Hz is-

The controlling torque in gravity controlled meter is proportional to -