Question 1: Example of vector quantity ?
Answer: Velocity, acceleration, moment, displacement, force, electric field intensity, magnetic flux
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Question 2: Examples of scalar quantity ?
Answer: Work, time, mass, distance, energy, pressure, speed, temperature
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Question 3: The resultant of two forces acting on an object is maximum if the angle between them is ?
Answer: 0°
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Question 4: The terrestrial telescope has one extra lens more than the astronomical telescope. The extra lens is for ?
Answer: Erection of the image
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Question 5: What is the angle of dip at the magnetic equator ?
Answer: 0°
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Question 6: At resonance, the phase angle in an a.c. circuit is ?
Answer: 0°
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Question 7: The process of energy production in the sun is ?
Answer: Nuclear fusion
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Question 8: A transistor functions mainly as a ?
Answer: Switch and amplifier
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Question 9: Energy losses through eddy currents are reduced by using ?
Answer: Insulated soft iron wires
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Question 10: The effect of a particle in a fluid attaining its terminal velocity is that the ?
Answer: Weight is equal to the retarding force
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Question 11: Water is a poor thermometric liquid because it ?
Answer: Wet glass
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Question 12: To produce an enlarged and erect image with a concave mirror, the object must be positioned ?
Answer: Between the principal focus and the pole
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Question 13: The phenomenon that makes sound persist when its source has been removed is known as ?
Answer: Reverberation
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Question 14: The colours seen in soap bubbles are due to ?
Answer: Dispersion
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Question 15: The electromagnetic wave that can produce a heating effect on the environment is ?
Answer: Infra-red
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Question 16: Pure silicon can be converted to a p-type material by adding a controlled amount of ?
Answer: Trivalent atoms
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Question 17: The particle that is responsible for nuclear fission in a nuclear reactor is ?
Answer: Neutron
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Question 18: The carbon-granule microphone works on the principle of change in ?
Answer: Resistance
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Question 19: The phenomenon whereby the water droplets in the atmosphere combine with dust particles in the air to reduce visibility is ?
Answer: Fog
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Question 20: In a semi-conductor junction diode, as the depletion or barrier layer is forward biased, the layer ?
Answer: Narrows
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Question 21: As the pressure of a fluid increases, its viscosity ?
Answer: Increases
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Question 22: To change a d.c dynamo to a.c dynamo ?
Answer: Commutator should be replaced with slip rings
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Question 23: Transverse waves can be distinguished from longitudinal waves using the characteristic of ?
Answer: Polarization
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Question 24: The North pole of a magnet can never be separated from the South pole because of a property known as ?
Answer: Magnetic dipole
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Question 25: The charge carriers in gases are ?
Answer: Electrons and ions
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Question 26: The ray which causes gas molecules to glow is known as ?
Answer: Cathode ray
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Question 27: Lenz’s law is a law of the conservation of ?
Answer: Energy
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Question 28: The phenomenon of light bending round an obstacle is ?
Answer: Diffraction
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Question 29: The instrument that measures both a.c. and d.c. is ?
Answer: Moving iron ammeter
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Question 30: What is the leat possible error in using a rule graduated in centimeters ?
Answer: 0.5 cm
More Questions to be expected on JAMB Physics
Question 1: The object moves with uniform speed round a circle. Its acceleration has
Answer: Constant magnitude and varying direction
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Question 2: The motion of a moving skin of a talking drum can rightly be described as ?
Answer: Oscillatory
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Question 3: Isotopes are nuclei which has ?
Answer: The same atomic number but different mass number
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Question 4: The net charge on the atom is zero becuase
Answer: The neutrons form shield around the charged protons
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Question 5: Gases conduct electricity under
Answer: Low pressure and high voltage
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Question 6: For resonance to occur in a.c circuit containing a resistor, capacitor and inductor
Answer: When the frequency source is such that the reactance of the capacitor is equal to the inductive reactance
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Question 7: In a purely inductive circuit, the current
Answer: Lags behind the voltage in phase by 90 degree
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Question 8: The principle of operation of an induction coil is based on
Answer: Faraday’s law
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Question 9: A dynamo primarily converts
Answer: Mechanical energy into electrical energy
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Question 10: To convert a milliameter to an ammeter
Answer: A low resistance in series is required
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Question 11: In order to convert a galvanometer into an ammeter
Answer: A low resistance shunt is connected in parallel
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Question 12: If two parallel conductors carry currents flowing in the same direction, the conductors will
Answer: Attract each other
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Question 13: A calibrated potentiometer is used to measure the emf of a cell because the ?
Answer: Potentiometer takes no current from the cell
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Question 14: The resistance of an open series circuit is ?
Answer: lnfinite
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Question 15: When white light is dispersed by a spectrometer, the component having the shortest wavelength is
Answer: Violet
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