WorksheetsPre-UPS 2: C3 and C4 DP024
Total questions: 20
Worksheet time: 20mins
Which factor does NOT affect the resistance?
Type of material
Mass of the material
Length of material
Area of the material
The picture shows an electrical circuit. What is TRUE about the electrical circuit?
The same current flows through all three light bulbs.
The same voltage across through all three light bulbs.
The current is divided between the three light bulbs.
The voltage is divided between the three light bulbs.
The picture shows an electrical circuit. What is TRUE about the electrical circuit?
The same current flows through all three light bulbs.
The same voltage across through all three light bulbs.
The current is divided between the three light bulbs.
The voltage is divided between the three light bulbs.
In parallel circuit, if one of the light bulbs burns out, what will happen to the rest?
The other bulbs will get dimmer.
If one light goes out, they all go out.
If one light goes out, it does not affect the others.
The battery will become stronger.
In series circuit, if one of the light bulbs burns out, what will happen to the rest?
The other bulbs will get dimmer.
If one light goes out, they all go out.
If one light goes out, it does not affect the others.
The battery will become stronger
Two identical filament lamps P and Q, a switch S are connected to a battery as shown. With the switch S opened, both lamps will light up with normal brightness. Assume that the lamps do not fuse. When the switch S is closed,
both lamps become brighter.
both lamps become dimmer.
P is brighter, but Q is dimmer.
P is not lighted, but Q is brighter.
If the voltage is increased and the resistance stays the same, current will ……
increase.
decease.
stay the same.
changes.
If the voltage stays the same and the resistance is increased, current will ……
increase.
decrease.
stay the same.
changes.
According to Ohm’s law, if you were to triple the voltage of a circuit without changing the resistance, what would happen to the flow of current?
It would stay the same.
It would increase by 2x.
It would increase by 3x.
It would decrease by 3x.
According to Ohm’s law, if you were to double the voltage and double the resistance, what would happen to the flow of current?
It would stay the same.
It would increase by 2x.
It would increase by 3x.
It would decrease by 3x.
Combined capacitance is equal to the ……
sum of all capacitance of capacitors.
product of all the capacitance.
difference between the capacitors.
average between the capacitors.
Which of the following statements DOES NOT describe a capacitor an electrical device?
It stores charge and electrical potential energy.
It is manufactured in many sizes and shapes.
It is used to smooth out unwanted fluctuations due to power surges in electronic circuits.
It allows current to pass through in any condition.
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
A battery is attached to three different capacitors connected in parallel. Which of the following statements is true?
Potential difference across the capacitor with the smallest capacitance is the largest.
The capacitor with the largest capacitance carries the smallest charge.
The potential difference across the three capacitors is the same, and the equivalent capacitance is greater than any of the three capacitors.
All three capacitors have the same charge, and the equivalent capacitance is greater than the capacitance of any of the capacitors in the group.
You double the voltage across a certain conductor and you observe the current increases double times. What can you conclude?
Ohm’s law is obeyed since the current still increases when V increases
Ohm’s law is not obeyed
This has nothing to do with Ohm’s law
None of the above.
What happens to the charge in a capacitor during the discharging process?
Increases over time.
Decreases over time.
Remains the same.
Unchanged.
During charging a capacitor through a resistor …….
the current in the circuit increases linearly with time.
the current in the circuit decreases linearly with time.
the current in the circuit increases exponentially with time.
the current in the circuit decreases exponentially with time.
Which of the following statements is described a charge on capacitors P, Q and R as shown in figure below
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.
Which of the following statement are CORRECT about the figure below?
Charge across C2 and C3 are same.
Voltage across C1 and C2 are same.
Total capacitance is C1 + C2 + C3.
Charge across C1 and C3 are same.
In the circuit shown, capacitor C is initially uncharged. At time t = 0, the switch S is closed. Which of the following statements is correct regarding the charging of the capacitor?
Immediately after S is closed, the current in the circuit rise slowly until a maximum value.
The capacitor is fully charged after a time t = CR.
Immediately after S is closed, the current in the circuit is a maximum, the current then decreases.
The current in the circuit at any time only depends on the resistance R and is independent of the capacitance C.
