Major Competitive Exams
Q. What is the union of the sets I = {1, 2} and J = {2, 3}?
A.
{1, 2, 3}
B.
{1, 2}
C.
{2, 3}
D.
{1, 2, 2, 3}
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Solution
The union of two sets includes all unique elements from both sets. Thus, I ∪ J = {1, 2, 3}.
Correct Answer: A — {1, 2, 3}
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Q. What is the union of the sets {1, 2} and {2, 3}?
A.
{1, 2}
B.
{1, 2, 3}
C.
{2, 3}
D.
{1, 2, 2, 3}
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Solution
The union of two sets includes all elements from both sets without duplicates. Thus, {1, 2} ∪ {2, 3} = {1, 2, 3}.
Correct Answer: B — {1, 2, 3}
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Q. What is the union of the sets {a, b} and {b, c}?
A.
{a, b}
B.
{a, b, c}
C.
{b, c}
D.
{a, c}
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Solution
The union of two sets is the set of elements that are in either set. Here, {a, b} ∪ {b, c} = {a, b, c}.
Correct Answer: B — {a, b, c}
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Q. What is the unit of angular momentum in the SI system?
A.
kg·m/s
B.
kg·m^2/s
C.
kg·m^2/s^2
D.
Joule
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Solution
The unit of angular momentum is kg·m^2/s.
Correct Answer: B — kg·m^2/s
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Q. What is the unit of capacitance?
A.
Farad
B.
Coulomb
C.
Volt
D.
Ohm
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Solution
The unit of capacitance is the Farad (F), which is defined as one coulomb per volt.
Correct Answer: A — Farad
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Q. What is the unit of electric charge in the SI system? (2019)
A.
Coulomb
B.
Ampere
C.
Volt
D.
Ohm
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Solution
The unit of electric charge is Coulomb (C).
Correct Answer: A — Coulomb
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Q. What is the unit of electric charge?
A.
Volt
B.
Ampere
C.
Coulomb
D.
Ohm
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Solution
The unit of electric charge is the Coulomb.
Correct Answer: C — Coulomb
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Q. What is the unit of electric current?
A.
Volt
B.
Ohm
C.
Ampere
D.
Coulomb
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Solution
The unit of electric current is Ampere (A).
Correct Answer: C — Ampere
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Q. What is the unit of electric field strength?
A.
Volt per meter
B.
Coulomb per meter
C.
Newton per coulomb
D.
Joule per coulomb
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Solution
The electric field strength is defined as the force per unit charge, which is measured in volts per meter (V/m).
Correct Answer: A — Volt per meter
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Q. What is the unit of electric field?
A.
Volt
B.
Newton/Coulomb
C.
Coulomb
D.
Joule
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Solution
The electric field is defined as the force per unit charge, hence its unit is Newton per Coulomb (N/C).
Correct Answer: B — Newton/Coulomb
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Q. What is the unit of electric potential?
A.
Coulomb
B.
Volt
C.
Joule
D.
Newton
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Solution
The unit of electric potential is the Volt (V), which is defined as one Joule per Coulomb.
Correct Answer: B — Volt
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Q. What is the unit of electrical charge?
A.
Volt
B.
Ampere
C.
Coulomb
D.
Ohm
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Solution
The unit of electrical charge is the Coulomb.
Correct Answer: C — Coulomb
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Q. What is the unit of electrical conductivity? (2023)
A.
Ohm
B.
Siemens
C.
Volt
D.
Ampere
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Solution
The unit of electrical conductivity is Siemens (S).
Correct Answer: B — Siemens
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Q. What is the unit of electrical resistance?
A.
Volt
B.
Ampere
C.
Ohm
D.
Watt
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Solution
The unit of electrical resistance is Ohm.
Correct Answer: C — Ohm
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Q. What is the unit of enthalpy?
A.
Joules per mole (J/mol)
B.
Calories per mole (cal/mol)
C.
Both A and B
D.
Liters per mole (L/mol)
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Solution
Enthalpy can be expressed in both Joules per mole and Calories per mole.
Correct Answer: C — Both A and B
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Q. What is the unit of entropy?
A.
J/mol·K
B.
J/K
C.
K
D.
J/mol
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Solution
The unit of entropy is Joules per mole per Kelvin (J/mol·K).
Correct Answer: A — J/mol·K
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Q. What is the unit of force in the International System of Units (SI)? (2019)
A.
Joule
B.
Newton
C.
Pascal
D.
Watt
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Solution
The unit of force in the SI system is the Newton (N), which is defined as the force required to accelerate a one-kilogram mass by one meter per second squared.
Correct Answer: B — Newton
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Q. What is the unit of force in the SI system?
A.
Joule
B.
Newton
C.
Pascal
D.
Watt
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Solution
The SI unit of force is the Newton.
Correct Answer: B — Newton
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Q. What is the unit of force? (2020)
A.
Newton
B.
Joule
C.
Pascal
D.
Watt
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Solution
The unit of force is Newton (N).
Correct Answer: A — Newton
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Q. What is the unit of frequency?
A.
Hertz
B.
Decibel
C.
Newton
D.
Joule
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Solution
The unit of frequency is Hertz (Hz), which measures cycles per second.
Correct Answer: A — Hertz
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Q. What is the unit of gravitational potential?
A.
J/kg
B.
N/kg
C.
J
D.
kg
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Solution
The unit of gravitational potential is Joules per kilogram (J/kg).
Correct Answer: A — J/kg
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Q. What is the unit of heat in the SI system?
A.
Joule
B.
Calorie
C.
Watt
D.
Newton
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Solution
The SI unit of heat is the Joule.
Correct Answer: A — Joule
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Q. What is the unit of impedance in an AC circuit?
A.
Ohm
B.
Farad
C.
Henry
D.
Coulomb
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Solution
The unit of impedance in an AC circuit is Ohm, which is the same as resistance.
Correct Answer: A — Ohm
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Q. What is the unit of inductance?
A.
Ohm
B.
Henry
C.
Farad
D.
Coulomb
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Solution
The unit of inductance is Henry (H).
Correct Answer: B — Henry
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Q. What is the unit of inductive reactance? (2020)
A.
Ohm
B.
Henry
C.
Farad
D.
Tesla
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Solution
Inductive reactance (X_L) is measured in Ohms (Ω), which is the same unit used for resistance.
Correct Answer: A — Ohm
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Q. What is the unit of magnetic field strength (B)?
A.
Tesla
B.
Weber
C.
Henry
D.
Ampere
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Solution
The unit of magnetic field strength is Tesla (T).
Correct Answer: A — Tesla
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Q. What is the unit of magnetic field strength as defined by the Biot-Savart Law?
A.
Tesla
B.
Newton
C.
Coulomb
D.
Ampere
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Solution
The unit of magnetic field strength is Tesla (T).
Correct Answer: A — Tesla
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Q. What is the unit of magnetic field strength as derived from Biot-Savart Law?
A.
Tesla
B.
Ampere
C.
Weber
D.
Henry
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Solution
The unit of magnetic field strength is Tesla (T), which is derived from the Biot-Savart Law.
Correct Answer: A — Tesla
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Q. What is the unit of magnetic field strength as derived from the Biot-Savart Law?
A.
Tesla
B.
Newton per Coulomb
C.
Volt per meter
D.
Ampere
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Solution
The unit of magnetic field strength is Tesla (T), which is derived from the Biot-Savart Law.
Correct Answer: A — Tesla
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Q. What is the unit of magnetic field strength as per Ampere's Law?
A.
Coulomb
B.
Tesla
C.
Henry
D.
Ohm
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Solution
The unit of magnetic field strength is Tesla (T), which is derived from Ampere's Law.
Correct Answer: B — Tesla
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