Capacitor

1. Which of the following statements DOES NOT describe a capacitor an electrical device?

• A. It stores charge and electrical potential energy.

• B. It is manufactured in many sizes and shapes.

• C. It is used to smooth out unwanted fluctuations due to power surges in electronic circuits.

• D. It allows current to pass through in any condition.

Two capacitors X and Y of capacitances 2 F and 4 F respectively are connected in series with

a 12 battery. Which of the following statements is CORRECT?

• The effective capacitance is 6 F.

• Capacitors have the same charge of 36 C.

• The potential difference across the capacitor X is 8 V.

• The potential difference across the capacitors Y is 12 V.

Tags

NGSS.HS-PS3-5

Which of the following statements is NOT TRUE about capacitance?

• The ratio of the total charge on either plate to the potential difference between both

  plates.

• The unit is CV^-1

• A device consist two metal plates separated by insulator.

• The unit is Farad.

Three capacitors 1.0 $\mu$   F, 1.5  $\mu$  F and 2.0  $\mu$  F are connected in series. What is the equivalent
capacitance of the capacitors? 

• 4.50  $\mu$  F

• 2.17  $\mu$  F

• 0.46  $\mu$  F

• 0.25  $\mu$  F

 What is the potential difference across a capacitor on a 5 $\mu$   F when the charge of capacitor is
120  $\mu$  C?

• 21 V

• 22 V

• 23 V

• 24 V

Two capacitors, 1.0 $\mu$   F and 0.5  $\mu$  F are connected in series to a 100 V current supply. What is
the amount of charge stored in the 1.0  $\mu$  F?

• 150  $\mu$  C

• 100  $\mu$  C

• 50  $\mu$  C

• 33  $\mu$  C

Capacitor C₁ is connected across a battery of 5 V. An identical capacitor C₂ is connected

across a battery of 10 V. Which one has the most charge?

• C₁

• C₂

• both have the same charge

• it depends on other factors

Two capacitors of capacitance C₁ and C₂ are connected in parallel. What is the effective

capacitance?

• C₁C₂

• C₁+C₂

• $\frac{1}{C_1}+\frac{1}{C_2}$

• $\frac{C_1C_2}{C_1+C_2}$

Tags

NGSS.HS-PS2-4

Which of the following statements is described a charge on capacitors P, Q and R as shown

in FIGURE 17.1.

• The charge in P is more than the charge in Q and R.

• The charge in Q is more than the charge in P and R.

• The charge in R is more than the charge in P and Q.

• The total charge in Q and R is more than the charge in P.

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Which of the following statement are CORRECT about the FIGURE 17.2?

• Charge across $C_2$ and $C_3$ are same.

• Voltage across $C_1$ and $C_2$ are same.

• Total capacitance is 2.25 $\mu$ F

• Total voltage across $C_2$ and $C_3$ are 16 V