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Quiz 61
Mdcat-past-papers Quiz
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1201. Square of distance between two point charges. In Coulomb's law the value of constant "K" is:
9 × 10⁹
9 × 10⁹
9 × 10⁹
9 × 10⁹ N•m²/C²
1202. The relative permittivity of iron is in:
Tens
Hundreds
Thousands
Zero
1203. Which of the following quantities is correctly matched to its unit:
Electric charge: Ampere (A)
Current: Volt
Electric power: Watt (W)
Resistance: Coulomb
1204. What is the increase in force between two charges if the separation between them is decreased by 50 percent:
Becomes four times
Increases by half
Doubles
Triples
1205. According to Coulomb's law, what happens to the electrostatic force between the 2-point charges if the distance between them is doubled?
The force becomes one-fourth
The force doubles
The force becomes half
The force remains the same
1206. The property due to which a substance attracts or repels other body is called:
Current
Charge
Magnetic field
All are correct
1207. Force exerted by unit charge is called:
Charge density
Electric flux density
Electric field strength
Magnetic field
1208. The concept of electric field lines was introduced by:
M. Faraday
Michelson
Henry
Newton
1209. If we double the separation between two charges, then Coulomb's force will become:
Doubled
Half
4-times
¼
1210. The dimension of magnetic field strength is same as that of:
Magnetic flux
Magnetic induction
Work done
Magnetic force
1211. NaCl dissolves quickly in water due to:
Low εr
High εr
εr = 0
εr = ∞
1212. Electric field strength at position vector r = (-4i + 3j)m caused by point charge q = 5μC placed at origin is:
1440i + 1080j N/m
1240i + 1080j N/m
1240i + 1280j N/C
1240i + 1080j N/C
1213. Force experienced per unit positive charge at a point in an electric field is the definition of:
Electric potential energy
Electric field strength
Electric potential
Electric field
1214. A point charge has electric field strength E and potential V at some distance. What is the potential at a point where field is E/4?
V/4
V/2
4V
2V
1215. A charged particle is moving in a uniform electric field. Which quantity has a constant non-zero value?
Acceleration
Displacement
Rate of change of acceleration
Velocity
1216. Electric field intensity inside a hollow charged sphere is:
Maximum
Negative
Zero
Positive
1217. The formula V = W/qo represents:
Electric intensity
Electric power
Electric potential
Electric field gradient
1218. Electric intensity between two oppositely charged plates in the middle region is:
Non-uniform
Uniform
Cannot be predicted
Variable
1219. Which one of the following is NOT a feature of electric force?
They act on charges
They act on masses
They can be attractive
They can be repulsive
1220. The electric field intensity between two uniform, oppositely charged parallel plates is:
1 V/m
1 J/C
1 C/m²
1/sec
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