Explore topic-wise MCQs in Engineering.

Find the total current through R₃ in the given circuit.

A 680 load resistor, R_L, is connected across a constant current source of 1.2 A. The internal source resistance, R_S, is 12 k. The load current, R_L, is

Find the current through R₂ of the given circuit.

Which of the following capacitors is polarized?

In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues?

When a 6 V battery is connected across the primary of a transformer with a turns ratio of 8, the secondary voltage is

What is the coefficient of coupling for a transformer in which 4% of the total flux generated in the primary does not pass through the secondary?

A 12 kHz voltage is applied to a 0.33 F capacitor, and 200 mA of rms current is measured. What is the value of the voltage?

A 0.01 F capacitor equals how many picofarads?

A sine wave voltage is applied across a capacitor. When the frequency of the voltage is decreased, the current

Of the following capacitors, which one has the highest dielectric constant?

A 4.7 M resistor is in series with a 0.015 F capacitor. The combination is across a 12 V source. How long does it take the capacitor to fully charge?

A capacitor of 0.02 F is larger than

Five time constants are required for a capacitor to charge fully or discharge fully.

Capacitance is directly proportional to plate area and plate separation.

The true power in a capacitor is zero.

A capacitor blocks ac but passes dc.

Energy is stored by a capacitor in a magnetic field.

X_C is inversely proportional to frequency and capacitance.

Voltage leads current by 90 in a capacitor.

Total parallel capacitance is less than that of the smallest capacitor in parallel.

The ohm is the unit of capacitance.

The dielectric constant is the ability of a material to establish an electric field.

An uncharged capacitor and a 1 k resistor are connected in series with a switch and a 6 V battery. At the instant the switch is closed, the voltage across the capacitor is

When the voltage across a capacitor is tripled, the stored charge

A 330 pF capacitor and a 220 pF capacitor are each connected across a 6 V dc source. The voltage across the 330 pF capacitor is

When the plate area of a capacitor increases,

Referring to circuit given, if R₁ is changed to a 68 resistor, what will be the current through it?

A 12 mA current source has an internal resistance, R_S, of 1.2 k. The equivalent voltage source is

An 18 V source has an internal resistance of 70 . If a load resistance of 33 is connected to the voltage source, the load power, P_L, is

A 120 load is connected across an ideal voltage source with V_S = 12 V. The voltage across the load

A 120 load is connected across a voltage source with V_S = 12 V and R_S = 8 . The voltage across the load is

Referring to the given circuit, the voltage and current for the load resistor, R_L, is

Find the current in R₂ of the given circuit, using the superposition theorem.

A basic one-loop dc generator is rotated at 90 rev/s. How many times each second does the dc output voltage peak (reach maximum)?

A 470 R_L is connected across a voltage source, V_S, of 120 V. The source's internal resistance, R_S, is 12 . What is the output voltage across the load?

The direction of a magnetic field within a magnet is

There is 900 mA of current through a wire with 40 turns. What is the reluctance of the circuit if the flux is 400 Wb?

The ability of a material to remain magnetized after removal of the magnetizing force is known as

When the north poles of two bar magnets are brought close together, there will be

The unit for permeability is

What is the magnetomotive force in a 75-turn coil of wire when there are 4 A of current through it?

The induced voltage across a stationary conductor in a stationary magnetic field is

The voltage induced across a certain coil is 200 mV. A 120 resistor is connected to the coil terminals. The induced current is

A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will

The unit for reluctance is

What is the reluctance of a material that has a length of 0.07 m, a cross-sectional area of 0.014 m², and a permeability of 4,500 Wb/At m?

A 2 R_L is connected across a voltage source, V_S, of 110 V. The source's internal resistance is 24 . What is the output voltage across the load?

If the steel disk in a crankshaft position sensor has stopped with the tab in the magnet's air gap, the induced voltage

When a solenoid is activated, the force that moves the plunger is