49753. The ‘Al Amin’ started publication from Calicut in October 1924 under the editorship of

49754. 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?

49755. 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

49756. What is the flux density when the flux is 5.5 Wb and the cross-sectional area is 6 × 10–3 m2?

49757. The unit for reluctance is

49758. If the steel disk in a crankshaft position sensor has stopped with the tab in the magnet's air gap, the induced voltage

49759. 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?

49760. 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)?

49761. What is the flux density in a magnetic field in which the flux in 0.1 m2 is 600 Wb?

49762. The unit for permeability is

49763. What is the magnetomotive force in a 75-turn coil of wire when there are 4 A of current through it?

49764. The direction of a magnetic field within a magnet is

49765. When the north poles of two bar magnets are brought close together, there will be

49766. The ability of a material to remain magnetized after removal of the magnetizing force is known as

49767. The voltage induced across a certain coil is 200 mV. A 120 resistor is connected to the coil terminals. The induced current is

49768. The induced voltage across a stationary conductor in a stationary magnetic field is

49769. An electromagnetic field exists only when there is

49770. When a solenoid is activated, the force that moves the plunger is

49771. What is the magnetomotive force (mmf) of a wire with 8 turns carrying three amperes of current?

49772. If a loop in a basic dc generator suddenly begins rotating at a faster speed, the induced voltage

49773. Lenz's law defines the polarity of the induced voltage.

49774. A magnetic field is made up of flux lines.

49775. Hysteresis is the number of lines of force per unit area in a magnetic field.

49776. If a conductor is moved back and forth at a constant rate in a constant magnetic field, the voltage in the conductor will reverse polarity.

49777. Materials with a low retentivity do not retain a magnetic field very well.

49778. Electromagnetic induction is the force that produces a magnetic field.

49779. The tesla is the unit of magnetic flux.

49780. Ampere-turn is the unit of magnetomotive force (mmf).

49781. A relay is an electromagnetically controlled mechanical device in which electrical contacts are opened or closed by a magnetizing current.

49782. Reluctance in a magnetic circuit is analogous to current in an electrical circuit.

49783. When the speed at which a conductor is moved through a magnetic field is increased, the induced voltage

49784. The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is

49785. For a given wirewound core, an increase in current through the coil

49786. If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density

49787. When the current through the coil of an electromagnet reverses, the

49788. Who was the first President of Nair Service Society

49789. As per Indian standards,only-------------welding shall be done for all joints in stainless steel for construction of a milk silo

49790. ----------pump is commonly used in dairy plants as a CIP return pump for cleaning solution that contains large amounts of air:

49791. If the moisture content of a food product on wet basis is 50%,the dry moisture content of the product is----------

49792. The theory applied for centrifugal separation of milk fat is----------

49793. How much resistance is required to limit the current from a 12 V battery to 3.6 mA?

49794. What is the voltage source for a circuit carrying 2 A of current through a 36 resistor?

49795. What is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source?

49796. How much voltage is needed to produce 2.5 A of current through a 200 resistor?

49797. When there is 12 mA of current through a 1.2 k resistor, the voltage across the resistor is

49798. A resistance of 3.3 M is connected across a 500 V source. The resulting current is approximately

49799. You are measuring the current in a circuit that is operated on an 18 V battery. The ammeter reads 40 mA. Later you notice the current has dropped to 20 mA. How much has the voltage changed?

49800. The current through a flashlight bulb is 40 mA and the total battery voltage is 4.5 V. The resistance of the bulb is approximately