PES SS 1 Physics 3rd Term 3rd Test
  • 1. The work done when a force acts on a charge from an electric point to another is known as
A) Resistivity
B) Electric field intensity
C) Conductivity
D) Electric potential
  • 2. Which Faraday's law relates the mass of a librated substance directly to the quantity of charge that passed through it
A) First
B) Fourth
C) Second
D) Third
  • 3. In the electrolysis of aqueous solution of sodium chloride using carbon electrode, which substance is discharged at the anode?
A) b
B) a
C) d
D) c
  • 4. The balance length on a meter bridge is achieved using
A) Galvanometer
B) Rheostat
C) Jockey
D) Variable resistor
  • 5. Which of these is used to convert a galvanometer to an ammeter?
A) Multiplier
B) Wheatstone bridge
C) Shunt
D) Potentiometer
  • 6. Which of these is not a component of a voltmeter ?
A) Electrode
B) Galvanometer
C) Cell
D) Electrolyte
  • 7. The pressure at which current flows is its
A) Charge
B) Electromotive force
C) Resistance
D) Voltage
  • 8. One of these is a positive ion
A) Anion
B) Cathode
C) Cation
D) Anode
  • 9. What is the formula for calculating the force between two protons?
A) Q/ 4π£oR
B) Qq/ 4π£oR²
C) Q/ 4π£oR²
D) qq/ 4π£oR²
  • 10. The permittivity of free space k is given as
A) 9×10⁹ u/F
B) 1.6×10-⁹ C
C) 8.85×10-¹² u/F
D) 3×10⁸ m/s
  • 11. A cell that cannot be reused is a
A) Secondary cell
B) Fuel cell
C) Primary cell
D) Reserve cell
  • 12. What class of lever is a plier?
A) Second
B) Third
C) First
D) Forth
  • 13. In which lever is the load in-between the fulcrum and the effort?
A) First
B) Forth
C) Second
D) Third
  • 14. The output of a machine is
A) Mechanical advantage of the machine
B) Velocity ratio of the machine
C) Work done by the machine
D) Work done on the machine
  • 15. Which of these may not be a cause of the different formulas for calculating the efficiency of the different machines?
A) Velocity ratio
B) Mechanical advantage
C) Type of machine
D) None
  • 16. Ohm's law states that
A) The current flowing through a conductor between two points is directly proportional to the voltage across the two points, provided the temperature remains constant.
B) The extension of a material is directly proportional to the load or force applied if the elastic limit is not exceeded
C) The induced current flows in such a way as to oppose the motion producing it
D) The diffusion of a gas is inversely proportional to the square root of its vapour density at constant temperature
  • 17. One example of amorphous substances is
A) Sugar
B) None
C) Salt
D) Glass
  • 18. A type of force that exists in between molecules of different substances is
A) Cohesion
B) Viscosity
C) Adhesion
D) Fricton
  • 19. The energy that a cell can supply before a circuit is completed is known as
A) EMF
B) Voltage
C) Current
D) Resistance
  • 20. One of these occurs before current is allowed to flow through a voltmeter during electrolysis
A) Movement of ions the their respective electrodes
B) Deposition of substances at the electrodes
C) Formation of a compound by the liberated substances
D) Dissociation of the electrolyte into constituent ions
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