Electricity and Circuits - SS1 Physics Past Questions and Answers - page 2
A resistor has a resistance of 100 ohms. If a current of 2 amperes flows through it, what is the voltage across the resistor?
50 volts
200 volts
100 volts
2 volts
If the resistance of a conductor is increased while keeping the voltage constant, what happens to the current flowing through the conductor?
It decreases
It increases
It remains the same
It becomes zero
A resistor has a resistance of 5 ohms. If a current of 2 amperes flows through it, what is the voltage across the resistor?
Using Ohm's Law: V = I x R
V = 2 A x 5 Ω
V = 10 volts
A circuit has a voltage of 12 volts applied across a resistor with a resistance of 3 ohms. What is the current flowing through the resistor?
Using Ohm's Law: I = V / R
I = 12 V / 3 Ω
I = 4 amperes
A circuit has a voltage of 24 volts applied across a resistor, and a current of 2 amperes flows through it. What is the resistance of the resistor?
Using Ohm's Law: R = V / I
R = 24 V / 2 A
R = 12 ohms
In a series circuit, the current passing through each component is:
Different
The same
Dependent on resistance
Dependent on voltage
In a parallel circuit, the voltage across each component is:
Different
The same
Dependent on resistance
Dependent on current
In a series circuit, the total resistance is equal to:
The sum of individual resistances
The product of individual resistances
The difference of individual resistances
The average of individual resistances
In a parallel circuit, the total resistance is:
Greater than the smallest individual resistance
Less than the smallest individual resistance
Equal to the sum of individual resistances
Independent of individual resistances
In a parallel circuit, the total current is:
Greater than the smallest individual current
Less than the smallest individual current
Equal to the sum of individual currents
Independent of individual currents