Units and measurement (voltage, current, resistance, power) MCQs

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1. The SI unit of electric current is:





2. The SI unit of voltage is:





3. The unit of electrical resistance is:





4. The SI unit of electrical power is:





5. Which of the following is the correct formula for electrical power?
𝑃
=
𝑉
Γ—
𝐼
P=VΓ—I
𝑃
=
𝑉
+
𝐼
P=V+I
𝑃
=
𝐼
/
𝑉
P=I/V
𝑃
=
𝑅
/
𝑉
P=R/V
𝑃
=
𝑉
Γ—
𝐼
P=VΓ—I





6. One kilowatt is equal to:





7. The formula to calculate resistance is:
𝑅
=
𝐼
/
𝑉
R=I/V
𝑅
=
𝑉
/
𝐼
R=V/I
𝑅
=
𝑃
Γ—
𝑉
R=PΓ—V
𝑅
=
𝑉
Γ—
𝐼
R=VΓ—I
𝑅
=
𝑉
/
𝐼
R=V/I





8. What is the unit of charge?





9. If 1 A of current flows through a conductor for 1 s, the total charge is:





10. Power is related to energy as:
𝑃
=
𝐸
Γ—
𝑑
P=EΓ—t
𝑃
=
𝐸
/
𝑑
P=E/t
𝑃
=
𝑑
/
𝐸
P=t/E
𝑃
=
𝐸
P=E
𝑃
=
𝐸
/
𝑑
P=E/t





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