DC Voltage
What is the source of electricity in batteries?
chemical reactions
If a circuit has a voltage of 12 volts and a resistance of 4 ohms, what is the current flowing through it?
3A
What do we call the force of gravity on an object?
weight
The weight of a box is 5N. Determine the mass of the box in grams.
500g
According to Hooke's Law, the tension force exerted on a spring is directly proportional to _____
The deformation or change in length of the spring
What is electrical current?
The flow of electric charge
In a parallel circuit, if you have three resistors with resistances of 3 ohms, 6 ohms, and 9 ohms, what is the equivalent resistance?
3 ohms
Name the force that acts in the opposite direction of the intended motion of an object.
friction
A box, of mass 800g, rests on a table.
Determine the magnitude of the normal reaction force acting on the box.
8N
When a rubber band is stretched, it follows Hooke's Law up to a point. Beyond that point, it no longer behaves elastically, and permanent deformation occurs. This point is known as _____
elastic limit
A battery supplies a voltage of 12 volts to a circuit. If two identical lamps are connected in series across it, what is the voltage across each lamp?
6V
In a circuit, three resistors are connected in parallel. The resistors have values of 10 ohms, 20 ohms, and 30 ohms, respectively. The voltage across the entire parallel circuit is 12 volts. What is the total current flowing through the circuit?
2.2A
List three ways where friction helps us in our daily life.
1) walking
2) writing
3) brakes on the car
How does the mass of the object affect the way it speeds up?
If you increase the mass of an object while keeping the force constant, the object will accelerate more slowly.
If a spring obeys Hooke's Law and has a spring constant (k) of 100 N/m, how much force is required to compress it by 0.2 meters?
20N
In a circuit, there are three identical components connected in parallel across a battery. If a current of 2.25A is supplied by the battery, what is the current flowing in each component?
0.75A
A resistor with a resistance of 50 ohms is connected to a 120-volt power source. Calculate the power dissipated in the resistor.
288W
What force causes a compass needle to align with the Earth's magnetic field?
magnetic field
A car is moving at a constant velocity of 30 m/s. If no net force is applied to the car, what will its velocity be after 10 seconds?
30 m/s
A spring with an initial length of 50cm is compressed by a force, resulting in a compression of 0.1m. What is the final length of the compressed spring?
0.4 m
You're using an oscilloscope with a vertical sensitivity of 0.2 V/div. When you measure a DC voltage, the luminous line on the screen moves 3 divisions upward. What is the DC voltage being measured?
0.6V
The power dissipated in a resistor when a current of 3A flows through it is 720W. Determine the resistance of the resistor.
80 ohms
When two bodies interact, the forces they exert on each other are ______ and _________.
opposite, equal
A book is sliding to the right on a table. If the book comes to a stop, what can you conclude about the net force acting on it?
The net force is to the left
A student applies a force of 25 N to stretch a spring of initial length Li = 10cm. If the spring is stretched to a length Lf = 15cm, what is the spring constant K of the spring in N/cm?
K =5 N/cm